31 results about "Visual masking" patented technology

Where images are displayed such that unintended light is also included and that light cannot be fully subtracted from the displayed image, an image processor compensates by compensating for the remaining light using perceptual models. In some cases, the perceptual model includes a plurality of user sensitivities and computation is performed, at least in part, based on expected user sensitivity to light pollution in portions of the images. The perceptual model might include a contrast sensitivity function, threshold-vs-intensity, saliency prediction and visual masking. The model might include artist indications of view attention. A light pollution likelihood map might be used to reduce the amount of computation needed, using a likelihood measure to determine an amount of computation to perform.

The present invention provides a method for reducing the visual impact of defects present in a matrix display comprising a plurality of pixels, said pixels comprising at least three sub-pixels, each sub-pixel intended for generating a sub-pixel color which cannot be obtained by a linear combination of the sub-pixel colors of the other sub-pixels of the pixel, the method comprising: providing a representation of a human vision system, characterizing at least one defect sub-pixel present in the display, the defect sub-pixel intended for generating a first sub-pixel color, the defect sub-pixel being surrounded by a plurality of non-defective sub-pixels, deriving drive signals for at least some of the plurality of non-defective sub pixels in accordance with the representation of the human vision system and the characterizing of the at least one defect sub-pixel, to thereby minimize an expected response of the human vision system to the defect sub-pixel, and driving at least some of the plurality of non-defective sub-pixels with the derived drive signals, wherein minimizing the response of the human vision system to the defect sub-pixel comprises changing the light output value of at least one non-defective sub-pixel for generating another sub-pixel color, said another sub-pixel color differing from said first sub-pixel color. The present invention also provides a corresponding system for reducing the visual impact of defects present in a matrix display, and a matrix display with reduced visual impact of defects present in the display.

Some embodiments of the invention encode a sequence of video images based on “visual masking” attributes of the video images and / or portions of the video images. Visual masking of an image or a portion of the image is an indication of how much coding artifacts can be tolerated in the image or image portion. To express the visual masking attribute of an image or an image portion, some embodiments compute a visual masking strength that quantifies the brightness energy of the image or the image portion. In some embodiments, the brightness energy is measured as a function of the average luma or pixel energy of the image or image portion.

The invention discloses a self-adaptive image watermark embedding method based on wavelet transformation and visual characteristics in the technical field of digital image information security. The self-adaptive image watermark embedding method includes the steps of performing grey processing on an image, calculating a comprehensive visual masking value of each pixel in the image, performing wavelet transformation on the image to obtain a low-frequency component wavelet coefficient, a high-frequency horizontal component wavelet coefficient, a high-frequency vertical component wavelet coefficient and a high-frequency diagonal component wavelet coefficient of each pixel in the image, calculating visual masking values of the low-frequency component wavelet coefficients and visual marking values of the high-frequency diagonal component wavelet coefficients respectively, averagely dividing a watermark sequence into two watermark sub-sequences, determining the positions where the low-frequency component wavelet coefficients are embedded into a watermark, embedding the low-frequency component wavelet coefficients into one watermark sub-sequence, determining the positions where the high-frequency diagonal component wavelet coefficients are embedded into a watermark, embedding the high-frequency diagonal component wavelet coefficients into the other watermark sub-sequence, and finally performing wavelet transformation to obtain the image with the watermarks embedded. According to the self-adaptive image watermark embedding method, invisibility and robustness of the watermarks are improved.

The invention provides a method and system for concentrating document data, which belong to the technical fields of computers and software. Compared with the prior art, the present invention includes a concentration area collection unit, a concentration mark setting unit, and a document concentration execution unit, wherein, through the concentration area collection unit, the area information that needs to be concentrated is collected; , to receive a condensed identifier representing the information of the condensed area; through the document condensing execution unit, the part of the document to be condensed is concealed, and the condensed identifier is displayed. In this way, the data part that needs to be concentrated in the document can be masked visually, which is more conducive to reading or editing, or other operational purposes.

The invention discloses a self-adaptive robust video watermarking method based on AVS (Audio Video Standard), which mainly solves the problems of high complexity, non-blindness, great gap between the current method and the AVS, and the like in the current method. When watermarks are embedded, a discrete cosine transformation low-frequency coefficient visual masking value corresponding to each subblock of video frame I is firstly calculated according to a Watson model; the energy of each subblock is sequenced in a descending order; and a large-energy subblock is selected as a watermark embedding position to be in secret key storage. Watermark embedding strength is controlled through the low-frequency coefficient visual masking value in a self-adaptive manner so as to embed the watermarks. When the watermarks are extracted, the embedded watermarking subblocks are found according to the secret key at first; and then the watermarks are extracted through comparing the relation between the subblock discrete cosine transformation low-frequency coefficient and a threshold value. In the invention, the watermark embedding and extracting arithmetic is simple; the embedding position and strength are self-adaptive; with better transparency, robustness and real-time property, the method belongs to original basic research work and meets the copyright protection needs of mass video products after the large-scale popularization and commercial application of the AVS; and the method has broad market application prospect.

The present invention relates to a multi-user-oriented HDR video dynamic range scalable encoding method. First, considering the perception characteristics of HDR video, a dynamic range scalable model is proposed, which decomposes HDR videos of different dynamic range levels into a standard dynamic range video and Multiple residual signal frame sequences; then, combined with the brightness masking effect and human eye perception characteristics, quantize and filter multiple residual signal frame sequences, filter out scattered data points in the residual, and retain the residual signal frame sequence The overall difference information between adjacent dynamic range levels improves the coding efficiency of the residual signal frame sequence; finally, the standard dynamic range video and the HDR video of each dynamic range level are reconstructed at the decoding end to adapt to multi-client display devices. The method also utilizes the visual masking property to suppress the noise and improve the efficiency of the dynamic range scalable coding.

The invention discloses a virtual viewpoint quality evaluation method based on a visual masking effect. According to the method, the types of virtual viewpoint rendering distortions are fully considered, offset compensation is performed on a virtual viewpoint image, the offset compensation process aims at special distortions such as a pixel point offset in the rendering of a virtual viewpoint, the affect of the pixel point position offset on the quality of the virtual viewpoint image is well eliminated, and thus subjective and objective quality results of the virtual viewpoint image are more accordant; the human visual characteristics are fully considered, a visual sensitive mask pattern of a reference image is extracted, the affect of distortion of a visual insensitive area in the virtual viewpoint image on the objective quality evaluation result is eliminated, and thus the objective quality evaluation result is more accordant with human visual characteristics; a distortion amplitude masking effect and a distortion distribution masking effect are fully considered, the distortion masking pattern of the virtual viewpoint image is computed for extracting areas with large distortion amplitudes and concentrated distortion distributions, and the affects of the distortions with different amplitudes and different distributions on the human visual subjective quality are effectively distinguished.

A touch panel providing a touch signal is disclosed. The touch panel includes a substrate, a first visual masking layer, an electrode layer, a metal material layer, and a second visual masking layer. The substrate has a surface. The first visual masking layer is disposed on at least one edge area of the surface. A part of the electrode layer is disposed at a display area on the surface adjacent to the edge area, and another part of the electrode layer covers at least a portion of the first visual masking layer. The metal material layer is disposed at the edge area and electrically connected with the electrode layer. The second visual masking layer is disposed at the edge area and stacked on the first visual masking layer. The said another part of the electrode layer is sandwiched between the first visual masking layer and the second visual masking layer.

The invention relates to the fields of image processing and computer graphics, and aims to improve the quality of spliced ​​images by utilizing visual salience and masking effects, reduce image quality degradation caused by edge fractures, and obtain visually high-quality spliced ​​and fused images. The technical solution adopted by the present invention is an image splicing and fusion method based on the visual characteristics of the human eye. The steps are as follows: process the overlapped area of ​​the two images after the matching operation processing, and search for the splicing path in this area: 1. Search in the overlapped area Regions with visual masking characteristics; 2. Find the pixel weights of smooth regions and texture regions; 3. Find the visual salience of overlapping regions; 4. Solve the stitching path; 5. Use this path to complete image stitching. The invention is mainly applied to image processing occasions.

The invention discloses an objective analysis method for just noticeable change step length of stereo images. The objective analysis method comprises the following steps of: training each distorted stereo image in a distorted stereo image set by using different weight proportion combinations to obtain a support vector regression training model of the different weight proportion combinations; testing any test image by utilizing the support vector regression model obtained by training; in a condition that a left-view image has a constant and invariable quality, measuring a critical quality point of a right-view point image when the quality variation of the stereo image is sensed by human eyes so that a maximum variation range in which the quality of the right-view image can be decreased relative to the quality of the left-view image can be determined when the stereo image is coded. The objective analysis method not only can achieve the purpose of improving coding efficiency by decreasing quality of the right-view image, but also ensures that an observer cannot sense the reduction in the quality of the right-view image through a stereoscopic visual masking effect, thereby ensuring the integral quality of the stereo image.

The invention provides a touch panel for providing touch signals. The touch panel includes a substrate, a first visual shielding layer, an electrode layer, a metal material layer and a second visual shielding layer. The substrate has a surface, and the first visual shielding layer is disposed on at least one edge region of the surface. A part of the electrode layer is disposed on the display area adjacent to the edge area on the surface, and another part of the electrode layer covers at least a part of the first visual shielding layer. The metal material layer is disposed on the edge area and is electrically connected to the electrode layer. The second visual shielding layer is disposed on the edge area and stacked on the first visual shielding layer. The other part of the electrode layer is interposed between the first visual shielding layer and the second visual shielding layer.

The present invention provides a system for natural and objective assessment of visual field function. The system includes: a host control unit, a display unit, and a human-computer interaction unit; wherein, the host control unit includes a calculation module, a judgment module, an adjustment module, and a storage module. The human-computer interaction unit includes a receiving module and a feedback module. The system of natural and objective assessment of visual field function provides subjects with a natural and objective assessment system of visual field function by changing the visual masking technique in the basic research of visual psychophysics, so as to quantitatively evaluate the functional level of visual field, which can be widely extended to neuroscience in ophthalmology clinical diagnosis.