155 results about "Color edge" patented technology

The invention discloses a method for locating a vehicle license plate in complex background. The method comprises the following steps: (1). Differentiating a gray scale mean of a fixed-size region and extracting a vehicle body image from a video; (2). preprocessing the vehicle body image such as gradation, gradient information enhancing, binarization and the like; (3). performing mathematical morphology operation on the processed vehicle body image, and performing primary screening by combining structural features of the vehicle license plate to obtain a plurality of candidate vehicle license plate regions; (4). converting the obtained candidate vehicle license plate regions into an HSV color spatial image; (5). adopting a BP neural network to perform color identification on the HSV color spatial candidate vehicle license plate image, and performing color edge detection by computing the mean color distance between two adjacent regions of a certain pixel; (6). judging edge color pair of an edge point, and eliminating the false vehicle license plate edge; and (7). performing final vehicle license plate location by the texture feature of the vehicle license plate. The method is suitable for complex background, and has higher location accuracy rate and higher robustness.

An adaptive demosaicing method is disclosed that interpolates images based on color edge detection and neighborhood voting. The adaptive demosaicing algorithm uses a voting scheme to determine the direction of interpolation at each missing luminance pixel location. Each color plane votes either horizontal or vertical based on a comparison between the vertical and horizontal components of the degree of change (i.e., gradient, Laplacian or other measure of the degree of change) in that color plane. Votes are counted from the neighborhood pixels as well as from measurements taken at the pixel location itself. Once the luminance plane is fully interpolated, the chrominance planes are filled in by a simple bilinear or median interpolation of difference chrominance values. Enhancements to the adaptive demosaicing algorithm permit adaptive smoothing and sharpening.

Every printing system has characteristic defects which detract from high quality printing. Xerographic printing systems show defects such as banding, mottled colors in large fill areas, trail-edge deletion and starvation where toner concentrations drop at certain color edges, misregistration, and so on. Ink jet printing systems can show ink bleeding, streaking in the direction of head movement, and so on. One approach to reducing printer defects is to refine the electro-mechanics for more precise printing. Another approach which works for predictable defects is to modify the digital data being sent to the printer to pre-compensate for the defect. The prior art does this to a limited extent for individual object types (strokes, fills, images, text, etc.) and for misregistered color edges (trapping). This invention extends the range of edge-related defects that can be both predicted and pre-compensated for. An embodiment of the invention is described which pre-compensates for defects such as trail-edge deletion, starvation, misregistration, halo, etc. by identifying runs of color which meet the criteria likely to cause the effect and applying a function f(edge-distance, object-type) to such runs to modify them appropriately. Both the prediction criteria and the functions applied are anamorphic (the scan direction and process direction are treated differently) and object-optimized (object attributes are taken into account). Further, both prediction criteria and applied correction functions allow user-settable input.

The invention discloses an organic light emitting display panel and a display device. A part, near a non-display area, in a display area for light emitting display is defined as a display area edge, and a pixel on the display area edge is provided with a first capacitor related to a grid of a driving transistor in the pixel; a part, except the display area edge, in the display area is defined as a display area remainder, and a pixel on the display area remainder is provided with a second capacitor related to a grid of a driving transistor in the pixel; a capacitance value of the first capacitor is set to be different from that of the second capacitor, namely, the first capacitor in the pixel on the display area edge and the second capacitor in the pixel on the display area remainder are designed differently; the brightness of the pixel on the display area edge is lower than that of the pixel on the display area remainder, then the color contrast between the display area edge and the non-display area can be reduced, and a sawtooth effect and a color edge effect of the organic light emitting display panel can be relieved.

A method and system for determining surface topology of a three-dimensional (3D) structure, based on a structured pattern that is projected onto the surface structure, and images of the pattern superposed on the structured surface are analysed to provide surface coordinates of the structure. The pattern comprises a plurality of unique color edges defined between pairs of differently-colored stripes, which substantially overcomes ambiguity problems. In one embodiment, a calibration method is provided enabling the surface coordinates to be obtained from a single image of the structure.

The invention discloses a method for improving the edge display effect of a circular display screen. The method includes: determining the edge area and the central area of the circular display screen; dividing the edge area of the circular display screen into display areas of n brightness levels along a direction pointing from the geometrical center to the edge area; adjusting pixels in the edge area to corresponding target brightness according to the display brightness of pixels in the central area and the brightness levels of the display areas. By the method, the brightness of the pixels in the edge area is allowed to be lower than that of the central area, the brightness of the pixels in the display areas in the edge area sequentially decreases along the direction pointing from the central area to the edge area, and the problems of edge aliasing, color edges and bright edges of the circular display screen are improved.

A method, computer program product and system for detecting and compensating for color misregistration. A black/white edge or a solid color edge on a target may be scanned. A black/white edge may refer to a black image, e.g., black text, on a white surrounding background having a rapid spatial transition from black to white. A solid color edge may refer to a solid color image, e.g., solid color text, on a white surrounding background having a rapid spatial transition from color to white. A curve of gray values versus spatial pixel positions for each color channel, e.g., red, green and blue color channels, may be generated. A misregistration error may then be calculated by calculating the offset between the color channel curves. The misregistration error may then be used to calibrate the scanner to compensate for the detected color misregistration.

A computing device for detecting an object of interest in an image is provided. The computing device includes a memory device and a processor to process image data by evaluating pixel contrast to facilitate detecting an edge transition in an image, by identifying neighboring pixels that are above a predetermined contrast value, which represent a potential object of interest, filtering the pixels based on color information to identify areas where there is a color edge transition, applying a convolution filter mask to yield regions of pixels having a localized concentration of contrast and color changes, applying a threshold filter for identifying those pixel regions having values that are greater than a predetermined threshold value and grouping the identified pixel regions into one or more groups representing an object of interest, and generating an alert to notify an operator that the object of interest in the image has been detected.

What is disclosed is a novel system and method for color trapping on halftoned bi-level bitmaps. Color edges are detected and edge pixels that need to be trapped are identified. The number of pixels qualified as edge pixels eligible for color trapping can be up to a pre-determined number of pixels away from the color edge. Estimates for the continuous-tone values are obtained for the dominant colors on each side of the two-color edge. The contone value of the dominant color on the opposing side of the two-color edge is assigned to the qualified edge pixels. Qualified edge pixels are re-halftoned using their assigned contone value so that halftones for one color are extended beyond the edge into the other color. The re-halftoned edge pixels are combined with the original bitmap to produce a new bitmap for the image. The new bitmap is then provided to an image output device.

The embodiment of the invention provides pixel arrangement of an organic light-emitting display panel. The pixel arrangement of the organic light-emitting display panel comprises repetitive units arranged in an array mode. The repetitive units comprise a first pixel row to a sixth pixel column, wherein the first pixel column comprises a first sub-pixel located in an i-th pixel row and a second sub-pixel located in an (i+2)-th pixel row; the second pixel column comprises a third sub-pixel located in a j-th pixel row and a (j+2)-th pixel row; the third pixel column comprises a second sub-pixel located in an i-th pixel row and a first sub-pixel located in the (i+2)-th pixel row; the fourth pixel column comprises a second sub-pixel located in a j-th pixel row and a first sub-pixel located in a(j+2)-th pixel row; the fifth pixel column comprises a third sub-pixel located in an i-th pixel row and an (i+2)-th pixel row; the sixth pixel column comprises a first sub-pixel located in an j-th pixel row and a second sub-pixel located in a (j+2)-th pixel row, wherein i = 1, j = 2, or j = 1, i = 2. According to the scheme, the evaporation color mixing risk can be reduced, the mask plate manufacturing difficulty is reduced, the aperture opening ratio is increased, and the color edge phenomenon can be improved.

The invention aims to provide a tire with a color pattern and a production method thereof. The lateral surface of the tire can have various colors and patterns. the production method comprises the following main process that in the forming process, a color film is adhered to glue at a tire side, wherein the position on a vulcanization die, which corresponds to the tire side, is provided with a ring-shaped groove; a bulge corresponding to a preset pattern is arranged in the ring-shaped groove; and the bulge corresponds to the position of the color film in a tire blank. The position of the tire side of the formed tire is provided with a boss higher than the outline of a normal tire side; the upper surface of the boss is provided with a sucken pattern; and the sucken part at least has one color different from the basic color of the tire. According to the invention, appearance quality of the tire is improved; the lateral surface of the tire can have various colors and patterns; the tire is provided with a clear color edge and is of a regular shape; safety of the tire is not influenced; the process is simple; and the tire is convenient to produce.

A method of modifying a CFA image or full-color image having a plurality of color channels and a panchromatic channel, includes capturing the panchromatic channel at a different exposure time than at least one of the color image channels with the CFA sensor within one image; producing a panchromatic edge map and a color edge map from the CFA image; using the panchromatic edge map and the color edge map to provide motion estimates; and using the motion estimates to modify at least one of the channels of the CFA image or full-color image.

The invention discloses a robot vision locating method based on round road sign imaging analysis, belonging to the technical field of robot vision location. The robot vision locating method is characterized by comprising the following steps of: designing and placing a circular road sign; identifying the circular road sign, wherein the step of identifying the circular road sign comprises the three procedures of fitting edges with specific colors, fitting RANSAC (Random Sampling Consensus) ellipse and checking the sign; and finally, locating a mobile robot. The robot vision locating method has the advantages of location completion by using only one road sign, simple road sign mode, short detection process, capability of being used in outdoor light conditions and simpleness and rapidness in location.

A method of correction for toner misregistration in color printing systems, specifically for run length encoded image data. This method, called “trapping”, usually involves extending the color separations one or more pixels to overlay the edge. The color of the “trap zone” is chosen such that it is nearly imperceptible in the presence of the two initial colors. Our approach assumes the existence of a “trap generator”, which provides a trap color given two input colors.

In run length encoded image format, the image is comprised of an array of “scanlines”, consisting of a string of “runs” that are specified by a minimum position in the fast (horizontal) direction, a length, and a color. We describe a method of trapping involving the following steps: 1) inspecting the run lengths in each scanline to determine the color edges of the image; 2) sending the colors at the boundaries to the trap generator to determine the trap color; and 3) modifying the intersecting runs with the trap color. The result is an efficient elimination of the edge defects at color boundaries, which is enabled by the run length encoded image format.

An improved method for color transient enhancement in an input video frame of pixels. The luminance value of a current pixel is compared to that of neighboring pixels. A correction value is determined and the chrominance value of the current pixel is “pushed” towards the neighboring pixel that has a luminance value closest to that of the current pixel, by adding the correction value to the current pixel's chrominance value. The original video frame is also separately processed using a CTI method, and the current pixel's corrected chrominance value is combined with the corresponding pixel in the output of the CTI processing by soft switching unit to generate an output video frame that is an enhanced version of the input video frame.

The invention relates to a pixel arrangement structure. The pixel arrangement structure comprises a first sub-pixel, a second sub-pixel, a third sub-pixel and a fourth sub-pixel, the centers of the two first sub-pixels arranged in an aligned mode and the centers of the two second sub-pixels arranged in an aligned mode serve as vertex connecting lines to form a virtual quadrangle, the virtual quadrangle comprises two opposite equilateral sides, a short side and a long side, the short side and the long side are arranged oppositely and connected with the vertexes of the equilateral sides; the short sides of the virtual quadrangle are not parallel to the long sides of the virtual quadrangle; and the third sub-pixel or the fourth sub-pixel is arranged in the virtual quadrangle, and the third sub-pixel and the fourth sub-pixel are the same in light emitting color. According to the pixel arrangement structure, the sub-pixels are arranged in a staggered mode due to the limiting conditions, thesituation that the sub-pixels emitting light of the same color are independently arranged in a column is avoided, and the color edge problem of the display edge is solved. The invention further provides a display panel and a display device.

The invention discloses a display substrate, a display panel and a display device. The display substrate comprises multiple first sub-pixel groups, multiple second sub-pixel groups and multiple thirdsub-pixel groups which are arranged in a matrix; along the row direction and the column direction of the matrix, the first sub-pixel groups, the second sub-pixel groups and the third sub-pixel groupsare sequentially and cyclically arranged; the first sub-pixel groups, the second sub-pixel groups and the third sub-pixel groups all comprise two sub-pixels with the same color, sub-pixels in the first sub-pixel groups, the second sub-pixel groups or the third sub-pixel groups have different colors, and two sub-pixels in the same sub-pixel group are arranged along a direction with an acute angle formed with the matrix row direction. According to the technical scheme provided by the embodiment of the invention, the gradient of the edge step of the pixel arrays of a circular display screen adopting the above-mentioned pixel arrangement mode is reduced, the edge sawtooth problem is effectively improved, the edge of the circular display screen can have complete red, green and blue sub-pixels,and a color edge phenomenon is eliminated.