253results about How to "Strong contrast" patented technology

The invention relates to a method and a device for evaluating the pilling resistance of a yarn by an on-line inlet and outlet measurement mode. The method comprises the steps of input pre-evaluation, uniform winding forming, preparation of a test sample by carrying pressurizing friction, stable backing-off and on-line measurement, comparison and evaluation. The device comprises a yarn supply and recovery device, a yarn pilling condition measurement device and a winding friction mechanism. The yarn pilling condition measurement device comprises a capacitor plate, a static electricity generation device and a yarn hairness measurement system. The static electricity generation device comprises a prepositive static electricity generator and a post static electricity generator. The prepositive static electricity generator and the post static electricity generator are respectively arranged at both sides of the yarn hairness measurement system. The capacitor plate is arranged at the rear sideof the post static electricity generator. The winding friction mechanism comprises a winding drum. The separation position of the unwound yarn and the winding drum is provided with a backing-off tension measurement mechanism. The winding friction mechanism is connected with a reciprocating mechanism. In the invention, the yarn is used for directly testing and panel knitting is not used; and by taking a base yarn as the contrast, the method and the device are more accurate.

The invention provides a multi-target tracking method integrating obvious characteristics and block division templates. A target motion area is detected by adoption of RGB component background difference and an iterative threshold, and the adaptive ability of a motion detection algorithm to scene illumination change is improved. Based on target area block division, a motion pixel color saliency weighted block centroid model, block centroid shifting fusion and a scale updating method, the calculation efficiency is high, the resistance to partial occlusion is high, and the similar color scene jamming ability is strong. The problem of multi-target measuring-tracking distribution is solved by adoption of two-level data association, and an occluded local area can be accurately positioned. Therefore, adaptive template updating is guided by an occlusion matrix, a reliable global centroid transfer vector is obtained by making use of effective colors and motion information of blocks, and finally, continuous, stable and fast multi-target tracking in complex scenes is realized. The multi-target tracking method integrating obvious characteristics and block division templates is applied to fields like intelligent video surveillance, in-air multi-target tracking and attacking, and multi-task tracking intelligent robots.

The invention relates to an image and video amplification method and a relevant image processing device. The method comprises a preprocessing module and a composite amplification module, wherein the preprocessing module is used for executing high-pass filtering processing to an input image to extract the high-frequency part of the input image and is used for executing image decomposition processing to the input image to decompose the input image into smooth areas and marginal areas; and the composite amplification module is used for conducting amplification processing to the original input image and the smooth areas through simple interpolation operation and is used for conducting amplification processing to the marginal areas and the high-frequency part through both complex interpolationoperation and simple interpolation operation. By adopting the method, the amplification results of the original input image, the smooth areas, the marginal areas and the high-frequency part can be fused, i.e. an output image with features of saw tooth resistance, clear-cut margin, rich detail, high contrast and the like can be output according to a preset amplification scale under the circumstance that the operation workload is small, the complexity is low and the speed is high.

The invention discloses a vehicle ambient environment three-dimensional reconstruction method for night vision. According to the technical scheme, a night vision system based on a three-dimensional laser radar sensor is constructed, the night vision system is composed of the vehicle mounted three-dimensional laser radar sensor, a computer, a display and three-dimensional reconstruction software, the three-dimensional reconstruction software is composed of an environmental mesh model generating module and a model color rendering module, the environmental mesh model generating module generates an environment height graph through three-dimensional point clouds, a triangular mesh environmental model is generated by conducting triangular patching on the environment height graph, the model color rendering module puts color on each triangular patch in the triangular mesh environmental model so that a three-dimensional reconstruction image can be generated, and the three-dimensional reconstruction image is displayed by the display. By the adoption of the vehicle ambient environment three-dimensional reconstruction method for the night vision, the three-dimensional rendering type terrain around a vehicle can be generated, the color of the reconstructed image can be closer to the visual sense of the eyes of people, display enhancement is conducted on the vision blind areas of a driver, the driver can have a good vision field even in the dark environment, and the requirements of night driving are met.

The invention relates to a multimodality bionic body model applied to ultrasonic or nuclear magnetic resonance detection. The multimodality bionic body model comprises a tissue organ body model, a fixed base and a fluid control system, wherein the tissue organ body model comprises a plurality of body model units imitating human body tissue organs, the plurality of body model units are fixed on the fixed base conforming human anatomy structure according to the tissue organ positions of the human anatomy structure, the tissue organ body model and the fixed base are prepared from a non-metal material, the tissue organ body model is composed of an ultrasonic and nuclear-magnetic bionic material, and the fluid control system is used for analog control of the blood circulation and respiratory movement of the human body. The multimodality bionic body model integrates the body model units imitating a plurality of main tissue organs on a human body trunk position, and is simple in structure; and the body model units are fixed on the fixed base by adopting the anatomic position relation, so as to achieve the actual imitation effect.

This invention is a method applicable to an image processing device, which includes the steps of providing a preprocess module for extracting a high-frequency portion of an image inputted into the device, extracting a gradient of the image and decomposing the image into plane and edge regions according to a predetermined fixed threshold, and providing a composite up-scaling module for executing the magnification processes on the image and the high-frequency portion thereof respectively, wherein the magnification process of plane regions of the image and the high-frequency portion is based on a simple interpolation while the edge regions of the image and the high-frequency portion is based on both a smart interpolation and the simple interpolation. The magnification results of the image and the high-frequency portion are then processed by a fusion process, so as to output an image having sharp but not blocky edges, rich details and strong contrast.

The invention discloses a measurement mechanism for lateral deformation of a pressure chamber of a true triaxial apparatus. The pressure chamber of the true triaxial apparatus is formed by a pressure chamber base, pressure chamber lateral walls and a pressure chamber top cover. Four pressure cavities are symmetrically distributed in the pressure chamber, and an emulsion membrane is respectively arranged in the four pressure cavities, and four emulsion membranes are respectively connected with an external pressure source and respectively form flexible hydraulic capsules after being filled withliquid. Lateral displacement measurement guide rods are radially and horizontally arranged in the four pressure cavities in a penetrating mode. One ends of the lateral displacement measurement guide rods penetrate through the corresponding emulsion membranes to be fixedly provided with vertical inner end plates which are flushed with the outer surfaces of the flexible hydraulic capsules, the other ends of the lateral displacement measurement guide rods extend out of the pressure chamber to be respectively connected with an electronic dial indicator. The measurement mechanism for the lateral deformation of the pressure chamber of the true triaxial apparatus is suitable for the true triaxial apparatus with axial rigidity loading and lateral flexible loading, and accurate measurement on the lateral deformation through the true triaxial apparatus is achieved.

The invention discloses a calibration method of an optical measuring system of three-dimensional outline structure of an object surface and belongs to the technical field of three-dimensional measuring methods and instruments. The calibration method of the optical measuring system of three-dimensional outline structure of the object surface consists of the followings steps: (1) a black-and-white camera is calibrated; (2) a projector is calibrated; (3) parameters required by a whole system are obtained by a multi-plane calibration method; and the calibration method of the optical measuring system of three-dimensional outline structure of an object surface is characterized in that (4) a target board is a color target board, and the foreground color and the background color of the target board are two colors that have the same reflectivity to the black-and-white camera; (5) in the step (1) of black-and-white camera calibration, a color light that has the same color with one of the foreground color and the background color of the target board is projected onto the target board. Compared with traditional methods that use a black-and-white target board, the calibration method of the optical measuring system of three-dimensional outline structure of the object surface has higher stability and reliability, improves calibration precision, and plays a vital role in the precise measurement aspect of the three-dimensional outline structure of the object surface.

The invention provides a method and device for measuring pipeline end face central points. The method includes the steps that an image of a pipeline with a target is collected; image coordinates of geometric centers of multiple mark points are acquired from the collected image; according to the relative positions of the mark points on a target plane, a target coordinate system is established, and coordinates of the mark points in the target coordinate system are acquired; according to the image coordinates of the geometric centers of the mark points and the coordinates of the mark points in the target coordinate system, the transformation relation between the target coordinate system and a camera coordinate system is acquired; according to the transformation relation between the target coordinate system and the camera coordinate system, coordinates of joint end face central points of the pipeline in the camera coordinate system are acquired; according to the coordinates of the joint end face central points of the pipeline in the camera coordinate system, the relative positions between the joint end face central points of the pipeline are acquired. By the adoption of the scheme, the speed and accuracy are high when the relative positions of the joint end face central points of the pipeline are measured.

The photosensitive resin composition of the present invention is an excellent photosensitive resin composition: exhibiting significant transmissibility at the use of an exposure light source of 160 nm or less, more specifically F2 excimer laser light, where line edge roughness and development time dependence are small and a problem of footing formation is improved; and comprising a resin which decomposes by an action of acid to increase the solubility in alkali developer, in which the resin contains a specific repeat unit; a compound capable of generating an acid upon irradiation with one of an actinic ray and a radiation, in which the compound includes at least two kinds of compounds selected from the group consisting of specific compounds (B1), (B2), (B3) and (B4).

The invention provides a method for preparing a scanning electron microscope (SEM) sample or a transmission electron microscope (TEM) sample protection layer by using a focused ion beam (FIB) technology, and is applied to samples of which target surfaces are made of metal. The method comprises the following steps of: selectively scanning a target region by an electronic beam; under the action of the electronic beam, depositing an organic material layer on the target region by gaseous organic impurities in an SEM or a TEM; and depositing a metal protection layer on the organic material layer. By using the method for preparing the SEM sample or the TEM sample protection layer by using the FIB technology, before the sample is prepared by using the FIB technology, the organic material layer is deposited on the target region by using the electronic beam, so that the surface of the target region serves as the sample made of the metal; a deposited organic material and a metal material on the surface of the target region are greatly contrasted, so that the interface definition of the metal surface of the SEM or TEM sample which is required to be precisely positioned is greatly improved; and the analysis quality of the SEM or TEM is improved.

The invention provides a device for automatically detecting the abrasion of the pantograph pan of a locomotive online. A front trigger switch and a rear trigger switch connected with a data processing and controlling device are fixed to the lateral surface of a detection shed at the height thereof being the same as the pantograph pan; a left background plate and a right background plate are respectively mounted on the left and right lateral surfaces of the detection shed; four image sensors are mounted on the detection shed; wherein a rear left image sensor and a rear right image sensor with the forward and downward viewing angle are respectively aimed at the front parts of the right background plate and the left background plate, and the rear left image sensor and the rear right image sensor are respectively aimed at the right half part and the left half part of a front plate of the pantograph pan of the locomotive when the rear trigger switch is triggered; and a front left image sensor and a front right image sensor with the backward and downward viewing angle are respectively aimed at the rear parts of the right background plate and the left background plate, and the front left image sensor and the front right image sensor are respectively aimed at the right half part and the left half part of the pantograph pan of the locomotive when the front trigger switch is triggered. Accordingly, the device capable of carrying out the automatic non-contact dynamic detection on the locomotive online has the advantages of high detection accuracy, safe and convenient application, high stability and reliability and long service life.

A human-computer interaction method based on neural signals relative to the visual movement relates to the technical filed of the human-computer interaction, and is characterized in that the method comprises the following steps: connecting a human-computer interaction unit waiting to be chosen with motional elements started at different times; arranging an EEG electrode in visual movement area of the user head for recording EEG signals; separately extracting brain waveforms corresponding to each motional element in a sequence according to the difference of the time starting; detecting whether an N2 electric potential corresponding with the visual movement; detecting that a human-computer interaction unit corresponding with the simulation of the N2 electric potential is considered as a target for a tested person; finishing the corresponding functional module by a computer, so as to realize the human-computer interaction. The testing results by the system shows that the choosing of a target averagely costs 6 seconds, and both the detection rate and the false reject rate meet the requirement of the regular human-computer interaction. The method has the advantages of having no scintillations, hardly causing the visual fatigue, and being suitable for low contrast and low illumination condition, and different human-computer sites.

The invention provides a discharging strength conversion method based on an ultraviolet imaging method. The invention provides a corresponding conversion method by designing an ultraviolet imaging detection discharging model, analyzing videos and processing a digital image, comprehensively considering a testing distance, an instrument gain and a relation between the discharging strength and ultraviolet imaging pattern quantized data, and analyzing all parameters and data to obtain a corresponding curve. The discharging strength conversion method can effectively guide the sensitivity and the accuracy of a typical defect ultraviolet imaging detection analysis of regional power grid electric transmission and transformation equipment, and provides a reliable testing basis for the discharging strength of the equipment.

The invention discloses a system and a method of analyzing energy consumption of an electric vehicle. The system comprises an electric quantity measuring module, a shaft power measurement module, a power acquisition module and a calculation module, wherein the electric quantity measuring module is used for measuring total output electric quantity of a power battery when a test vehicle drives at a preset vehicle speed at a preset ambient temperature; the shaft power measurement module is used for measuring total power absorbed by a driving shaft of a transmission system assembly when the test vehicle drives at the preset vehicle speed at the preset ambient temperature; the power acquisition module is used for acquiring total power absorbed by a chassis dynamometer when the test vehicle drives at the preset vehicle speed at the preset ambient temperature; and the calculation module is respectively connected with the electric quantity measuring module, the shaft power measurement module and the power acquisition module for respectively calculating the transmission system assembly efficiency and the wheel efficiency according to the total output electric quantity of the power battery, the total power absorbed by the driving shaft of the transmission system assembly and the total power absorbed by the chassis dynamometer. Thus, the overall energy consumption and the efficiency of the electric vehicle at the preset ambient temperature and the preset vehicle speed can be effectively analyzed.

The invention discloses a high resolution micro-vision system based on calculating ghost imaging and a method of obtaining images. The system successively comprises, on a light path, a laser source, a first diaphragm, a laser beam expanding lens, a collimating lens, a second diaphragm, a polarizer, a spatial light modulator, a polarization analyzer, a third diaphragm, a reflector, a beam splitter mirror, a convergent lens and a CCD camera, and also comprises a precision positioning objective table located on another light path of the beam splitter mirror and connected with a computer; the computer is also separately in connection with the spatial light modulator and the CCD camera, and obtains high resolution images through the calculating ghost imaging technology. The high resolution micro-vision system has a simple and compact structure, and employs light field intensity correlation measurement to recover object information, thereby eliminating the problem of classic optical system imaging distortion, and can obtain high accuracy and contrast images. The high resolution micro-vision system is very helpful for micro-vision system design and ghost imaging technology research.

The invention relates to truck space guiding system and method based on images. A plurality of cameras are arranged at the periphery of a parking lot truck space, images acquired by the cameras are transmitted to a host computer, and the host computer judges whether truck spaces of various relevant regions are occupied or not through analyzing contents of the acquired images. The invention is characterized in that: firstly, positions of regions of various truck spaces in the images are needed to be defined; secondly, the painting treatment is carried out on the ground of various truck spaces for improving the comparison of images with trucks or without trucks and enhancing the accuracy of the image analysis, the painted images have strong comparison and can not exist in common truck bodies; thirdly, the host computer needs to continuously scan various truck spaces corresponding to the cameras in a circulating way and analyze whether region images related to various truck spaces meet non-truck characteristics or not; and fourthly, the host computer judges that the trucks exist in the truck spaces in the system and sends left truck space information to an inlet direction board and dynamic direction boards of various regions.

New caramel compositions suitable for use with crisp bases such as cookies and crackers are provided. The new caramel compositions are able be packaged over long periods of storage in direct contact with a crisp base comprised of a cookie or cracker without adversely affecting the texture of either the crisp base or the caramel. They comprise a cooked mixture prepared from: liquid triglyceride, monosaccharide, disaccharide, polyol, milk solids, and emulsifier. The caramel exhibits an Aw of less than 0.42. Processing entails: mixing ingredients comprising liquid triglyceride, monosaccharide, disaccharide, polyol, milk solids, and emulsifier in a heating vessel; heating the ingredients to form a uniform heated mixture while scraping the vessel during heating to prevent scorching; and increasing the heat to boil the ingredients to a temperature and for a time to achieve caramelization.

The invention provides an evaluation device and method of well cementation flushing efficiency. Designed according to the Reynolds number equality theory, the device comprises a simulated well casing, a heating water tank, a power pump and an electromagnetic flowmeter, wherein the simulated well casing mainly comprises an inner barrel and an outer barrel; the inner barrel comprises an inner barrel body, steel screen meshes with different mesh numbers and an inner barrel end cover; the inner barrel can simulate a stratum under the circumstance that the steel screen meshes are covered with filter paper or the inner barrel is filled with quartz sand; the outer barrel can rotate; guide vanes with different forms are designed to simulate a casing pipe. The method is easy to operate, high in comparability and low in workload, can effectively form a filter cake, simulate and evaluate the characteristics of the flushing efficiency under the circumstance that the casing pipe rotates or a spiral centralizer is used, can evaluate the flushing efficiency of flushing fluid for a first interface and a second interface, can evaluate and optimally select the flushing fluid system and design the dosage of the flushing fluid, and is wide in application.

The invention relates to a paraffin sectioning method for an ocean shellfish D-shaped larva, which comprises the following steps: (1) Boulin solution is added to a container having an ocean shellfish D-shaped larva sample, and then alcohol with mass percentage concentration of 70% is added so as to obtain a fixed ocean shellfish D-shaped larva; (2) the fixed ocean shellfish D-shaped larva is wrapped up and is placed in a sample embedding box, and the sample embedding box is placed in a dehydrator or a staining jar; and then the steps of dehydration, transparency and wax impregnation are carried out; (3) embedding and sample location are carried out; (4) slicing and drying are carried out; and (5) a hematoxylin-eosin counterstaining method is adopted for dying. The paraffin sectioning method is simple and practical, has short processing time and transitional steps, leads all tissues of the larva to be gradually and completely immersed by reagent, well keeps the original state and structure of the tissues of the larva and provides a practical and effective technical means for research on early stage embryos and larva development of shellfishes.

The embodiment of the invention provides a seismic wavelet attenuation spectrum-based oil and gas detecting method and device. The method comprises the following steps of: carrying out noise removal processing on seismic data by adopting an independent component analyzing method; carrying out top and bottom seismic layer tracing on a target layer on the seismic data obtained after noise removal processing; arranging upper and lower two time windows along the top and bottom of the target layer; carrying out frequency spectrum analysis on the seismic data in the upper and lower two time windowsto obtain frequency spectrum distribution; carrying out complex cepstrum analysis on the frequency spectrum distribution to obtain a complex cepstrum of a seismic data amplitude spectrum; separating a complex cepstrum of a seismic wavelet amplitude spectrum from the complex cepstrum of the seismic data amplitude spectrum according to a preset low-pass time window; carrying out inverse transformation on the complex cepstrum of the seismic wavelet amplitude spectrum to obtain a seismic wavelet spectrum in the upper and lower two time windows; carrying out difference value calculation on the seismic wavelet spectrum to obtain a seismic wavelet attenuation spectrum; and detecting the oil and gas content of the stratum by analyzing the seismic wavelet attenuation spectrum. The invention can realize the aim of accurately and sensitively recognizing oil and gas.

The metal in-situ statistical distribution analysis method, mainly relates to chemical components and its state analysis of metal amterial, which includes the following steps: exciting light-source system to implement precombustion-free continuous excitation of sample and synchronous scanning location, making excited spectrum become into linear spectrum, collecting and recording spectrum intensity of single spark discharge, statistically analyzing collected and stored spectral line intensities of linear spectrums, using computer to process said data so as to measure the parameters of chemicalcomponent, segregation, looseness and foreign impurity distribution of sample.

The invention discloses a method for processing a theme resource. The method includes the steps of extracting a theme picture from the current theme resource of an application program, and determining a color system of the theme picture; based on the color system of the theme picture, determining that the color of character information is a first color, wherein the character information is character information on interface elements of the application program; based on the first color, extracting a first sub-skin-resource corresponding to the first color from a current skin resource of the application program, wherein a current parameter of a preset configuration item in the first sub-skin-resource is a first color parameter corresponding to the first color, and the preset configuration item is used for controlling the color of the character information; applying the first sub-skin-resource. Meanwhile, the invention discloses an electronic device.

The invention discloses a method for optimizing imaging parameters in a self-adaptive medical ultrasonic system and designs a method for improving the ultrasonic imaging quality by optimizing the sound velocity and the tissue sound attenuation coefficient. The method comprises the steps: changing the sound velocity and the tissue sound attenuation coefficient by iteration; using a series of processing methods to obtain the optimal scanning sound velocity and tissue sound attenuation coefficient; and finally setting the obtained coefficient into parameters used by the ultrasonic imaging so as to obtain ultrasonic images with more uniform brightness, better resolution and stronger contrast. A technique for optimizing the imaging parameters of the self-adaptive medical ultrasonic system has important clinical significance in diagnosis and is suitable for the technical field of medicine.

The invention discloses a cuckoo search-based underground mine image enhancement method, which adopts a cuckoo search algorithm in combination with a BGDPH algorithm provided by the invention to perform enhancement processing on an image, and comprises the following steps of: converting the underground mine image into an HSV color space, and performing adaptive nonlinear stretching processing on asaturation component S, initializing cuckoo search algorithm parameters and population and performing BGDPH algorithm processing on a brightness component V at each bird nest position to obtain an intermediate image, calculating the fitness value of the bird nest through the weighted fusion of the entropy value, the brightness difference value and the gray scale standard deviation of the intermediate image, iteratively updating the optimal bird nest position in a Levy flight regularization mode, and substituting the final optimal position into the BGDPH algorithm to enhance the component V, and finally, converting the HSV image back to the RGB space to obtain a final enhanced image. Compared with other methods, the method is good in image enhancement effect, and the visual effect of the underground mine image is obviously improved.

The invention discloses a well cementation flushing fluid evaluation device and method based on the principle of the identical shearing rate. The device is mainly composed of a manmade rock core or a steel pillar, an outer cylinder, a conversion adapter, a transmission device, a motor, a frame, a bearing plate and a thick liquid cup. The bearing plate and the motor are arranged on the frame. The thick liquid cup filled with flushing fluid is arranged on the bearing plate. The manmade rock core or steel pillar and the outer cylinder are located in the flushing fluid in the thick liquid cup. The manmade rock core or steel pillar is fixed on the frame through the conversion adapter. The outer cylinder is connected with the motor through the transmission device. The outer cylinder is provided with two rows of round holes for the flushing fluid to flow and the intervals of round holes of each row are 90 degrees. According to the well cementation flushing fluid evaluation device and method based on the principle of the identical shearing rate, the manmade rock core or the steel pillar is used for simulating a well wall and a casing pipe under a static state and the well cementation flushing fluid evaluation device and method are closer to engineering practice. The well cementation flushing fluid evaluation device and method based on the principle of the identical shearing rate have the advantages of being easy to operate, high in relative property and wide in application range and can measure the flushing efficiencies of a first interface and a second interface of well cementation by the flushing fluid respectively. According to the flushing efficiencies and the flushing time, a flushing fluid system is selected in an optimization mode and the use amount of the flushing fluid is designed. The well cementation flushing fluid evaluation device and method based on the principle of the identical shearing rate have the wide market prospect.

A method and system for optical measurement of a volume of dispensed fluid may be provided such as in connection with the calibration of pipettes. The method and system may include utilizing a fluid receptacle, an image recording device, and an image processing application to provide optical measurement of the volume of the dispensed fluid. The fluid receptacle may include a first plate and a second plate. The first and second plates may include respective opposing surfaces spaced apart from one another by a predetermined distance to define a space between the opposing surfaces. At least one of the first plate and the second plate may be substantially transparent to ensure that the dispensed fluid received in the space of the fluid receptacle is visible to the image recording device.

A comprehensive performance testing machine for an ultra-high speed oil bearing comprises a clamping device for clamping the oil bearing to be tested, a loading device used for applying loading force on the oil bearing to be tested through the clamping device, a dynamic pressure test shaft matched with an inner hole of the oil bearing to be tested, a rotation supporting device used for supporting the dynamic pressure test shaft and a driving device, wherein a temperature measuring hole used for a temperature sensor to be inserted is formed in the top of the clamping device, and both the temperature sensor and the driving device are both connected with an external electric control cabinet; the clamping device is composed of an upper clamping block and a lower clamping block, the oil bearing to be tested is clamped between the upper clamping block and the lower clamping block, the lower clamping block is arranged in a suspended mode through lifting ropes, connected with the loading device, at the two ends of the lower clamping block, and the loading device applies downward loading force on the upper clamping block. The comprehensive performance testing machine for the ultra-high speed oil bearing is overall high in repeatability and accuracy, long in service life, capable of having the self-cooling function, easy to operate and lubricate, simple in structure, low in manufacturing cost, stable in performance, high in intelligence degree and good in practical effect.

The invention discloses an image enhancing method based on self-adaptive block channel stretching. The method mainly solves two important problems of image defogging and exposure adjustment in image enhancement. In the prior art, many methods provide solution schemes for the two problems, but the methods have the defect that a plurality of thresholds for image adjustment are needed, and this kind of methods requires user interaction operation and fail to process a plurality of images at one time; in addition, in the prior art, fogged images and dark light images are taken as two kinds of image enhancing problems which are solved respectively, and a unified framework is lacked. Aimed at the defects of the existing methods, statistic learning is carried out on various kinds of images in a real world, a self-adaptive threshold of problem image adjustment is obtained, the manual interaction operation of a user is reduced, and the processing efficiency is improved; in addition, stretching conversion is simultaneously carried out on a highlight channel and a shadow channel of an image block, and the problem images including the fogged images and the dark light images can be enhanced under the same framework.

The invention discloses a low-illumination image enhancement method based on image fusion. The method comprises the steps of firstly converting an image from an RGB space to an HSV space, and then estimating an initial illumination image I from a V channel; filtering the initial illumination image I to obtain a further accurate illumination image II; performing gamma correction on the illuminationimage II to obtain a plurality of intermediate images; determining the weight of the intermediate image, and performing image fusion to obtain a final illumination image III; and solving a reflectiongraph, and converting the reflection graph from the HSV space to the RGB space to obtain a final enhancement graph. According to the fusion-based low-illumination image enhancement algorithm providedby the invention, an image can be effectively enhanced for a low-illumination condition, and an image with high contrast ratio, natural color and good visual effect is obtained. The algorithm can beapplied to a mobile phone, only one-key operation is needed, the quality of a low-light image is effectively improved, and the photographing experience of a user is improved.