31 results about "Visual threshold" patented technology

The invention discloses a double exposure implementation method for an inhomogeneous illumination image. The double exposure implementation method for the inhomogeneous illumination image comprises the following steps: obtaining an illumination image; obtaining a reflection image; overlaying the illumination image with the reflection image to obtain the global enhancement effect; fusing the global enhancement effect with the original image; and carrying out color correction on an enhancement result to obtain a visual matching image. According to the double exposure implementation method for the inhomogeneous illumination image, which is disclosed by the invention, the smooth property of the illumination image is constrained, and the reflection image is sharpened by the visual threshold value characteristic to guarantee the detail information of the image; with an image fusion method, the luminance, the contrast ratio and the color information of an original image luminance range can be effectively kept; because the characteristic of the human eye visual perception of average background brightness is introduced in, the fused image can be used for effectively eliminating image color distortion near a shadow boundary; the color of a low-illuminance zone is restored by the color correction technology; the colors of the low-illuminance zone and the luminance range are free from obvious distortion; the continuity is good; and the visual effect is more nature.

An image quality objective evaluation method based on manifold feature similarity is disclosed, which firstly adopts visual salience and visual threshold to remove image blocks which are unimportant to visual perception, namely, uses roughing selection and fine selection; and then utilizes the best mapping matrix after block selection to extract manifold feature vectors of image blocks which are selected from original undistorted natural scene images and distorted images to be evaluated; and then measures the structural distortion of distorted images according to manifold feature similarity; and then considers effects of image brightness changes on human eyes and obtains the brightness distortion of distorted images based on an average value of image blocks, and finally obtains quality scores according to structural distortion and brightness distortion; which allows the method of the present invention to have a higher evaluation accuracy, and also expands the evaluation capacity to various distortions.

The invention discloses a stereoscopic video quality evaluation method based on a binocular minimum discernible distortion model, which includes: firstly building a binocular stereoscopic brightness relation model, and researching respective pixel brightness of a left viewpoint video and a right viewpoint video and the brightness relation of the pixel brightness of the left viewpoint video and the right viewpoint video when they integrate to form a stereoscopic video ; building a stereoscopic image just noticeable difference (JND) model according to background brightness and texture masking, and building a stereoscopic video JND model according to a visual threshold value masked by video interframe; obtaining a visual threshold value of a function based on space-time contrast sensitivity through the function based on space-time contrast sensitivity and relative parameters of a display device; obtaining a binocular JND model by combining the stereoscopic video JND model and the visual threshold value of the function based on space-time contrast sensitivity; and finally building a binocular perception peak signal-to-noise ratio based on stereoscopic video quality for evaluating stereoscopic video quality. The method is based on the binocular JND model, leads evaluation of stereoscopic video quality to be identical with video quality subjectively perceived by human eyes, and correctly reflects human eye visual stereoscopic video perception quality.

The invention discloses an image compression method based on vision redundancy measurement. The image compression method mainly solves the problem that an existing image compression method is low in image compression efficiency. The image compression method includes the steps: (1) forecasting an image to be compressed through an autoregression model to obtain a forecasted image, (2) obtaining a residual image according to the image to be compressed and the forecasted image, and calculating local binary pattern values of pixels in the residual image, (3) counting the occurring probability of the same local binary pattern values in the neighbor areas around the pixels, and calculating the uncertainty of the image to be compressed, (4) calculating visual threshold values corresponding to the pixels according to the uncertainty to conduct redundancy removal operation on the image to be compressed to obtain the pre-processed image, and (5) compressing the pre-processed image to obtain a compressed image. According to the image compression method, vision redundancy information in the image can be effectively removed through the visual threshold values, the compression efficiency is promoted, and the image compression method can be used for transmitting online video, mobile phone picture-phone images and satellite remote sensing images.

The invention relates to a device capable of producing a contrast observation object and a chromatic aberration observation object and belongs to the technical field of optical precision measurement. The device comprises a first uniform surface light source, a second uniform surface light source, a first base color matching system, a second base color matching system, a first large integrating sphere, a second large integrating sphere, a target board, a cube beam splitter prism, a first reticle and a second reticle, wherein lights emitted by one uniform surface light source irradiate the base color matching systems, the lights with different colors and different brightness are produced by means of the base color matching systems, the lights emitted by the base color matching systems irradiate the large integrating spheres for color mixture to form the uniform surface light sources with specific colors and specific brightness, by means of the other same light path, the other uniform surface light source with specific colors and specific brightness are formed, and two path surface light sources pass by a follow-up light path to produce the contrast observation object and the chromatic aberration observation object. According to the device capable of producing the contrast observation object and the chromatic aberration observation object, the measurement range is wide, the structure is simple, and the device an be used for producing continuously-variable contrast observation objects and chromatic aberration observation objects for the measurement of visual threshold values.

The invention provides a smart camera network system and dynamic task allocation method. The smart camera network system comprises a smart camera network which monitors intersection information, a management center which stores the operating state and analysis results of the smart camera network, and a remote configuration system which configures the node parameters and operating states of the smart camera network. When detecting a required target for the first time, a camera node establishes an active tracking task, and transmits a tracking task message in a multicast form; when receiving the tracking task message, a camera node establishes a passive tracking task; and when the tracked target enters the visual threshold range of a next camera node from the visual threshold range of a last camera node, the last camera node terminates the active tracking task, and the next camera node converts the passive tracking task of the tracked target into an active tracking task. With the smart camera network system and dynamic task allocation method of the invention adopted, multicast communication can be realized, and the problem of high cost of broadcast communication can be solved. The smart camera network system and dynamic task allocation method have the advantages of high tracking quality and excellent expansibility.

The invention discloses a stereo image objective quality evaluation method based on integration of a visual threshold value and a passage. The stereo image objective quality evaluation method based on the integration of the visual threshold value and the passage includes: conducting visual threshold value analysis and singular value decomposition by distributing passages on an a left viewpoint image of an undistorted stereo image and a right viewpoint of the undistorted stereo image and a left viewpoint image of a distorted stereo image and a right viewpoint of the distorted stereo image; conducting visual threshold value analysis and singular value decomposition by distributing passages on difference images of the left viewpoint image of the undistorted stereo image and the right viewpoint of the undistorted stereo image and the left viewpoint image of the distorted stereo image and the right viewpoint of the distorted stereo image, and obtaining a stereo perception evaluating measurement by utilizing a liner combination method; finally conducting linear weighting combination on an objective evaluating scale measurement and a stereo perception evaluating measurement to obtain an overall quality evaluating objective value of the stereo image. The stereo image objective quality evaluation method based on the integration of the visual threshold value and the passage not only effectively utilizes visual properties such as a just-noticeable distorted visual threshold value, a visual covering effect and stereo perception, but also evaluates the stereo perception on the basis of evaluating the left viewpoint image quality and the right viewpoint image quality and improves relevance of an objective quality evaluating result and subjective perception.

The invention provides a nanometer traditional Chinese medicine oculentum for treating myopia and a preparing method thereof. The traditional Chinese medicine oculentum is prepared from, by weight, 30-50 parts of semen cassiae, 30-50 parts of pipewort, 20-40 parts of chrysanthemum flowers, 20-40 parts of tribulus terrestris, 5-10 parts of ginsengs, 15-35 parts of angelica sinensis, 15-30 parts of ligusticum wallichii, 10-20 parts of radix angelicae dahuricae, 30-50 parts of radix pueraiae, 20-40 parts of butterflybush flowers, 10-20 parts of coptis chinensis, 30-50 parts of folium mori and 10-20 parts of liquorice. According to the nanometer traditional Chinese medicine oculentum for treating myopia and the preparing method thereof, the penetrating power for medicine to pass through the space in the skin and the absorptivity of the absorption part are increased, the permeability is high, the eye microcirculation can be drastically improved, the blood flow is increased, the visual excitement degree is increased, the visual threshold value is lowered, and the ciliary muscle elasticity is restored, so that the vision of a patient is obviously improved; the nanometer traditional Chinese medicine oculentum can be applied to the inner parts of the eyes, and can also be smeared on the outer sides of the eyes, and the direct stimulus to the eyeballs is reduced.

The invention relates to a device and a method for measuring visual threshold values, and belongs to the technical field of optical precision measurement. The device for measuring the visual threshold value comprises a first uniform surface light source, a second uniform surface light source, a first fundamental color matching system, a second fundamental color matching system, a first complementary color matching system, a second complementary color matching system, a first color mixing system, a second color mixing system and a beam splitting system. A set of multi-parameter measurement device for the visual threshold values is implemented by utilizing a four-integrating sphere light source system and multiplexing the color matching systems, the color mixing systems and a subsequent light path to generate four observation targets of which the brightness (illuminance), the contrast, the chromaticity and the periodic pattern frequency are variable, and can be used for simultaneously measuring visual illuminance, contrast and chromatic aberration threshold values, so that the device is convenient to operate, wide in measurement range and color gamut adjustment range and higher in light source output power, and a plurality of parameters can be measured.

The invention discloses a video space-time search method. The video space-time search method comprises the steps of searching a video set satisfying a time constraint according to a time search condition; sampling a searching object into a plurality of sampling spatial points, and sampling the shooting direction into a plurality of direction units; determining whether the sampling spatial points are in visual threshold of video frames, obstructed by barriers and clearly imaged or not, and calculating perception intensity of the current spatial point by the current video frame if conditions are satisfied; calculating the direction of the video frame shooting the sampling spatial point, and merging each video frame to a corresponding angle unit; and calculating the sum of the perception intensity of the video frames belonging to the same video in each sampling spatial point and each angle unit, and selecting the video having the maximum perception intensity as the object video, a set formed by object videos involved in all sampling spatial points and direction units being a space-time search result. An ordered list of comprehensively describing spatial object information is obtained on this basis.

The invention discloses a cross validation depth map quality evaluation method combined with a JND model. According to the method, a color map corresponding to a depth map and a color map on an auxiliary viewpoint are utilized to obtain a difference image; the number of pixels at each coordinate in the color map on the auxiliary viewpoint to which the depth map and the color map corresponding to the depth map are mapped is utilized to obtain a shielding mask; then the shielding mask is utilized to remove pixel points shielded in the difference image to obtain a difference image after deshielding; then the color map on the auxiliary viewpoint is divided into a flat region, an edge region and a texture region to obtain a region marking map; a JND model is introduced, combined with the region marking map, an error visual threshold of each pixel point in the color map on the auxiliary viewpoint is obtained; and finally, according to the deshielded difference image and the error visual threshold, a depth error map is obtained, and the rate of error pixel points in the depth map is further obtained as a quality evaluation value. The advantage is that the method can effectively improve consistency of an evaluation result and the quality of virtual viewpoints obtained by drawing.

The invention discloses a Sudoku-matrix-index-based recoverable information hiding method of an image. The size of ICP insertion coding space corresponding to an ECover of a Cover is determined undera visual threshold control indicator, segmentation feature statistics is carried out on information M needing to be hidden, a Sudoku sequence and index optimization strategy enabling maximum probability depth continuous indexing to be realized are selected; on the basis of the index optimization strategy and the preferred Sudoku sequence, indexing is carried out, and depth continuous index codingis carried out in a row-column alternating manner in insertion coding space permitted by the ICP group of the ECover; the information hiding bPP index is improved on the condition of ensuring the visual threshold; and according to a reversible rule of an encoding rule, hidden information and recovering Cover are extracted. The method supports the information encryption feature and the hidden information is protected from being decoded.

The present invention relates to a device and method for visual threshold measurement, which belongs to the field of optical precision measurement technology. The device comprises a first uniform plane light source system, a second uniform plane light source system, a first primary color adjusting system, a second primary color adjusting system, a first complementary color adjusting system, a second complementary color adjusting system, a first color mixture system, a second color mixture system, and a beam splitting system. The device can generate four observation targets with variable brightness (illumination), contrast, color difference, and periodic pattern frequency, by using a four-integrating sphere light source system and by multiplexing the color adjusting systems, the color mixture systems, and subsequent light paths, so as to implement multi-parameter measurement for a set of visual thresholds. One device can simultaneously measure visual illumination, contrast, and color difference thresholds, and achieve ease operation, wide range measurement, multi-measurement-parameter coverage, large color gamut adjustment range, and high light source output power.

The invention discloses a road lighting field test operation mechanism which sequentially comprises a foundation base portion, a horizontal operation device, a control cabinet, a vertical operation device, a telescopic arm operation device, an elevation operation device and a lightning arrester from bottom to top. The road lighting field test operation mechanism has the advantage that the various visual tests (visual threshold, reaction time, visibility level, legibility and the like) of road lighting are difficult to perform on actual roads and can be performed on test roads with abundant time. A field test evaluation system enables customers or users to sense actual lighting effect visually. The road lighting field test operation mechanism can evaluate the quality of a lighting system more reasonably, simultaneously can provide demonstration functions for the users, can simulate various road lamp lighting modes, can adjust parameters of lamp rod height, lamp rod installation space, lamp irradiation angle and the like, and contains various road lamp lighting modes basically and completely.

The invention belongs to the technical field of software design, and discloses an information processing method for building space openness based on a building three-dimensional parameterized model. The information processing method comprises the following steps: setting a vision field, and importing visual information data containing peripheral substance interface information in the vision fieldinto the parameterized model; evaluating the effectiveness of the parameterized model based on the position relationship between the viewpoint in the visual threshold and the substance interface, whether the geometric modeling of the substance interface is complete or not and whether the material setting of the substance interface is complete or not; if not, requesting the user to reset the parameterized model; selecting a parameterized model object in the measurement space and setting an object material; checking whether the material setting of the measurement object is complete or not; and outputting an evaluation result of the building space openness. According to the method, the designer can compute and compare the openness of different design schemes in a certain space in a numeralization manner by utilizing an existing building computer model without participation of a large number of users, the complexity of the evaluation process is reduced, and the problem of data leakage is avoided.

The invention discloses a preparation method of a traditional Chinese medicine eye ointment for treating myopia. The components in the formula and their parts by weight are as follows: cassia seeds 20-50, chrysanthemums 20-50, pearls 15-35, chuanxiong 30-60, Mengmihua 30-60, ginseng 15-30, Tribulus terrestris 20-50, Qingzizi 20-50 Rehmannia glutinosa 20-50, Vaseline 250-500, Menthol 100-300. The product is prepared by removing impurities from the above composition, pulverizing, packing, soaking in water, decocting, extracting the supernatant, dissolving vaseline and menthol, and mixing and stirring the supernatant evenly. It can penetrate through thirteen acupoints around the eyes, improve eye microcirculation, increase blood flow, increase visual excitement, lower visual threshold, effectively supplement the trace elements needed by the eyes, promote the metabolism of "corneal lens" and restore ciliary Muscle elasticity, fundamentally restore vision and no recurrence.

The invention relates to an FOV-based image data fusion indexing method, and the method comprises the steps: S100, obtaining image data based on a plurality of sensors, and building an image data set D; s200, acquiring a corresponding visual threshold of the image data in a geographic space based on optical parameters added to the image data, establishing a visual threshold set W corresponding to the D, and performing secondary fusion processing on the W to obtain a set W'and an image data set D 'corresponding to the W'; s300, obtaining a plurality of space elements based on a user, and classifying and marking the space elements; s400, based on W ', D' and spatial elements, establishing a multi-element spatial index constrained by geographic factors; the mining analysis efficiency of diversified elements such as time elements, space elements interested by the user, image elements and the like is improved, and unified and efficient management of massive and multivariate image data is realized.

The invention discloses a linkage shooting control method and device and a computer readable storage medium, and the method comprises the steps: identifying and analyzing a shooting state, and determining a visual state and an operation state in the shooting state; then, if the visual state difference is greater than a preset visual threshold value, analyzing the operation state, and the operationstate comprising an operation gesture of the wearable device corresponding to the operation object; and finally, obtaining a first shooting parameter control signal sent by the wearable device, analyzing the operation gesture to obtain a second shooting parameter control signal, and adjusting a shooting parameter of the to-be-shot scene by combining the first shooting parameter control signal andthe second shooting parameter control signal. A humanized linkage shooting control scheme is realized, so that a user more conveniently and correspondingly regulates and controls shooting parametersin the shooting process of the terminal device, the operation efficiency is improved, and the user experience is enhanced.

The invention discloses a cross validation depth map quality evaluation method combined with a JND model. According to the method, a color map corresponding to a depth map and a color map on an auxiliary viewpoint are utilized to obtain a difference image; the number of pixels at each coordinate in the color map on the auxiliary viewpoint to which the depth map and the color map corresponding to the depth map are mapped is utilized to obtain a shielding mask; then the shielding mask is utilized to remove pixel points shielded in the difference image to obtain a difference image after deshielding; then the color map on the auxiliary viewpoint is divided into a flat region, an edge region and a texture region to obtain a region marking map; a JND model is introduced, combined with the region marking map, an error visual threshold of each pixel point in the color map on the auxiliary viewpoint is obtained; and finally, according to the deshielded difference image and the error visual threshold, a depth error map is obtained, and the rate of error pixel points in the depth map is further obtained as a quality evaluation value. The advantage is that the method can effectively improve consistency of an evaluation result and the quality of virtual viewpoints obtained by drawing.

The invention discloses an image recoverable information hiding method based on Sudoku matrix index. First, under the visual threshold control index, determine the size of the ICP insertion coding space corresponding to ECover for Cover, conduct statistics on the segmentation features of the information M to be hidden, and select the Sudoku sequence and index optimization strategy that can continuously index with the maximum probability depth. Then index based on the index optimization strategy and the optimal Sudoku sequence, in the allowed insertion coding space of the ICP group of ECover, the depth continuous index coding is performed alternately by row and column. Finally, under the condition of ensuring the visual threshold, the bPP index of information hiding is improved. Finally, according to the reversible rules of the encoding rules, the hidden information is extracted and the Cover is recovered. The method supports the feature of information encryption and can protect hidden information from being deciphered.

The invention discloses a stereo image objective quality evaluation method based on integration of a visual threshold value and a passage. The stereo image objective quality evaluation method based on the integration of the visual threshold value and the passage includes: conducting visual threshold value analysis and singular value decomposition by distributing passages on an a left viewpoint image of an undistorted stereo image and a right viewpoint of the undistorted stereo image and a left viewpoint image of a distorted stereo image and a right viewpoint of the distorted stereo image; conducting visual threshold value analysis and singular value decomposition by distributing passages on difference images of the left viewpoint image of the undistorted stereo image and the right viewpoint of the undistorted stereo image and the left viewpoint image of the distorted stereo image and the right viewpoint of the distorted stereo image, and obtaining a stereo perception evaluating measurement by utilizing a liner combination method; finally conducting linear weighting combination on an objective evaluating scale measurement and a stereo perception evaluating measurement to obtain an overall quality evaluating objective value of the stereo image. The stereo image objective quality evaluation method based on the integration of the visual threshold value and the passage not only effectively utilizes visual properties such as a just-noticeable distorted visual threshold value, a visual covering effect and stereo perception, but also evaluates the stereo perception on the basis of evaluating the left viewpoint image quality and the right viewpoint image quality and improves relevance of an objective quality evaluating result and subjective perception.

The invention discloses a road lighting field test operation mechanism which sequentially comprises a foundation base portion, a horizontal operation device, a control cabinet, a vertical operation device, a telescopic arm operation device, an elevation operation device and a lightning arrester from bottom to top. The road lighting field test operation mechanism has the advantage that the various visual tests (visual threshold, reaction time, visibility level, legibility and the like) of road lighting are difficult to perform on actual roads and can be performed on test roads with abundant time. A field test evaluation system enables customers or users to sense actual lighting effect visually. The road lighting field test operation mechanism can evaluate the quality of a lighting system more reasonably, simultaneously can provide demonstration functions for the users, can simulate various road lamp lighting modes, can adjust parameters of lamp rod height, lamp rod installation space, lamp irradiation angle and the like, and contains various road lamp lighting modes basically and completely.

The invention relates to a device capable of producing a contrast observation object and a chromatic aberration observation object and belongs to the technical field of optical precision measurement. The device comprises a first uniform surface light source, a second uniform surface light source, a first base color matching system, a second base color matching system, a first large integrating sphere, a second large integrating sphere, a target board, a cube beam splitter prism, a first reticle and a second reticle, wherein lights emitted by one uniform surface light source irradiate the base color matching systems, the lights with different colors and different brightness are produced by means of the base color matching systems, the lights emitted by the base color matching systems irradiate the large integrating spheres for color mixture to form the uniform surface light sources with specific colors and specific brightness, by means of the other same light path, the other uniform surface light source with specific colors and specific brightness are formed, and two path surface light sources pass by a follow-up light path to produce the contrast observation object and the chromatic aberration observation object. According to the device capable of producing the contrast observation object and the chromatic aberration observation object, the measurement range is wide, the structure is simple, and the device an be used for producing continuously-variable contrast observation objects and chromatic aberration observation objects for the measurement of visual threshold values.

The invention belongs to the technical field of software design, and discloses an information processing method based on a three-dimensional parameterized model of a building space for a sense of openness in a building, setting a view field and importing the view field into the parametric model that includes information on the interface of surrounding materials. Information data; evaluate the validity of the parametric model based on the positional relationship between the viewpoint and the material interface in the visual threshold, whether the geometric shape of the material interface is complete, and whether the material setting of the material interface is complete; if it is invalid, ask the user to reset the parameterization Model; select the parametric model object in the measurement space, and set the object material; check whether the material setting of the measurement object is complete; output the evaluation results of the openness of the architectural space. The invention enables the designer to numerically calculate and compare the openness of different design schemes in a certain space by using the existing architectural computer model; without the participation of a large number of users, the tediousness and complexity of the evaluation process is reduced, and the Data breach problem.

The invention provides a method for quickly detecting the appearance, which can quickly detect whether glue overflows from the edge of a transferred product, and improves the detection capacity. A CCD lens is externally connected with a 100-times magnifying lens, the CCD lens is arranged towards a lower base, the position of the base is fixed, the central area of the base is a visual threshold of the CCD lens, and a first edge guiding lower groove, a second edge guiding lower groove, a third edge guiding lower groove and a fourth edge guiding lower groove are formed in the upper surface of the base; a product is fixedly arranged on the upper surface of a product fixing plate, and a pair of downward-protruding moving guide columns arranged at intervals are arranged on the lower surface of the product fixing plate; when the movable guide column moves along the first edge guide lower groove, the visual threshold covers the first edge of the product; when the movable guide column moves along the second edge guide lower groove, the visual threshold covers the second edge of the product; when the movable guide column moves along the third edge guide lower groove, the visual threshold covers the third edge of the product; and when the movable guide column moves along the fourth edge guide lower groove, the visual threshold covers the fourth edge of the product.

The invention discloses an image contrast enhancement method based on the visual characteristics of a display and human eyes, and relates to the field of display technology. The main steps of the present invention are to obtain the target cumulative histogram distribution according to the actual measurement or standard display device luminance curve and the human eye minimum resolution threshold curve; use the target cumulative histogram distribution to specify the cumulative histogram of each image sub-block to obtain each image The pixel value of the central pixel of the sub-block; interpolation processing is performed on the remaining pixels of each image sub-block to obtain the corresponding pixel value, and an output contrast-enhanced image is obtained. The technical problem to be solved by the present invention is to realize image contrast enhancement based on the visual characteristics of the display and the human eye, which can improve the target contrast so that it is not less than the visual threshold of the human eye in a specific background, and at the same time avoid the image contrast of the larger part. over-enhancement and suppresses image noise.