15 results about "Halftone" patented technology

A manufacturing process for a display panel (50) comprising a light source (LD) and a pixel circuit configured to operate the light source (LD), comprising the manufacturing process of: forming the pixel circuit on a substrate (SUB); and forming the light source (LD) on the pixel circuit, wherein forming the pixel circuit comprises: forming a first electrode layer on the substrate (SUB); forming a buffer layer (BUF) on the first electrode layer; and forming an active layer on the buffer layer (BUF), wherein forming the active layer comprises: depositing a first active layer (ACT1) and depositing a second active layer (ACT2) on the first active layer (ACT1);a first structuring step in which a photoresist (PR) material is applied to the second active layer (ACT2), a photoresist (PR) pattern is formed by a halftone mask, and the second active layer (ACT2) is etched to expose part of the first active layer (ACT1); a halftone ashing step of the photoresist (PR) pattern to expose part of the structured second active layer (ACT2); and a second structuring step in which the exposed part of the first active layer (ACT1) is etched using the structured second active layer (ACT2) as a mask.

The disclosure discloses an organic light emitting display device including a first electrode, a pixel definition layer disposed on the first electrode and exposing a portion of the first electrode through an opening, an organic material layer disposed in the opening of the pixel definition layer, and a second electrode disposed on the organic material layer, and a manufacturing method thereof, and an electronic device thereof. In this case, the pixel definition layer includes a halftone layer composed of a photosensitive composition, a trench formed in the halftone layer, and a full-tone layer protruding from the halftone layer.

The application discloses a kind of super capacity invisible two-dimensional code technology based on true color multicolor halftone dot array.The technology takes two-dimensional code information capacity and its anti-fake application as target, based on printed true color CMYK corresponding quaternary encoding rule, through self-defined color coding technology, original information is modulated to generate multicolor halftone dot array two-dimensional code.The code takes single printing dot as encoding unit, collects its microscopic image to obtain the dot array distribution data of single dot, and decoding can be realized.Compared with prior art, the super capacity invisible two-dimensional code of the application has large encoding density, high identification reliability, and has the functional advantages of super capacity, invisible anti-fake, and has very high actual market value in e-commerce, printing and packaging, product traceability and other fields.

This invention provides a halftone processing method for inkjet printing based on cross-gradient halftone screens, comprising: S1, color space conversion; S2, dot basic unit design; S3, halftone screen generation and filling; S4, error diffusion processing; and S5, image compositing. The advantages of this method in terms of fundamental technology are: accurate color space conversion; stable error diffusion control; and a reliable channel processing mechanism. The advantages of this method in terms of innovation are: cross-line halftone dots provide better directionality; gradient transitions reduce graininess; and overlapping filling ensures smoothness.

A method is provided for manufacturing a security document by intaglio-printing a rendering of a three-dimensional object on the security document. The method comprises at least the following: S1) providing a model (1) of the object with a plurality of surfaces (A, B, C, D) in three-dimensional space; S2) attributing, to each point on the surfaces (A, B, C, D), a grayscale or color value; S3) using mapping functions (M) for mapping the surfaces (A, B, C, D) into two-dimensional parameter spaces, thereby defining grayscale or color images (2) in the parameter spaces, wherein the grayscale or color value of each point in said images is given by the grayscale or color of the point on the surface corresponding to the point of the image; S4) rendering, in the parameter spaces, the grayscale or color images (2) as halftone images (3) using halftone patterns, wherein at least some of the halftone patterns are different from each other; S5) using inverses of the mapping functions for mapping the halftone images (3) as textures onto the surfaces (A, B, C, D); S6) projecting the model with the surfaces (A, B, C, D) carrying the textures into a two-dimensional printing plane using a three-dimensional projection (P), thereby projecting said halftone images (3) and textures into the printing plane; S7) rendering, within the printing plane, the surfaces (A, B, C, D) with the textures into a two-dimensional array of printing pixels and forming an intaglio printing plate (5) with recesses corresponding to the array of the printing pixels; and S8) printing, using the intaglio printing plate (5), the rendering of the three-dimensional object onto said security document.

This disclosure relates to the field of industrial automation technology, and provides a method and apparatus for calculating the screen printing path of a convex irregular bottle. The method includes: decomposing the convex contour point set of the bottle to be printed into several continuous straight line segments and / or curve segments according to a preset straightness tolerance parameter, generating a segment information set; for the curve segment, according to the target rotation angle, rotating the contour points in the current curve segment in the opposite direction of the origin by the target rotation angle, searching for the point with the largest ordinate value in the rotation point set as a tangent candidate point, performing secondary interpolation within the interval formed by the tangent candidate point and its adjacent points to obtain the brush point coordinates, and calculating the halftone dot coordinates according to the segment starting length of the current curve segment and the cumulative length of the brush point within the segment of the current curve segment; generating printing path data containing brush point trajectory and halftone dot trajectory, wherein the brush point trajectory is composed of brush point coordinates and the halftone dot trajectory is composed of halftone dot coordinates.

This invention provides an image processing device, an image processing method, and a program that can prevent a decrease in character quality. [Solution] An image processing device 1 performs image processing on an image in which region attributes are defined for each pixel by region discrimination that distinguishes between character regions and halftone regions, and comprises a machine learning discrimination unit 100 that performs region discrimination using a machine learning model 19. When performing region discrimination, the machine learning discrimination unit 100 compares the characters extracted from the input image with the machine learning model 19 and determines the region attribute of the characters as a character attribute.

The present application relates to a kind of based on halftone noise and artifact enhancement document image tampering positioning method.The method constructs halftone noise perception stream, utilizes denoising residual mechanism to extract the micro halftone statistical law damaged by tampering;Frequency domain perception stream is constructed, decouples luminance and chroma in YCrCb color space, removes low-frequency background by combining adaptive frequency domain enhancement and adaptive high-pass filter, and accurately captures high-frequency quantization artifact;Covariance-based feature fusion mechanism is constructed, spatial domain, frequency domain and halftone noise domain features are cascaded and fused, and the conflict of multi-modal heterogeneity is relieved to accurately locate tampering area.The method is for the authenticity verification scene of document image disturbed by complex post-processing such as JPEG compression, scaling, and good results are obtained in positioning accuracy and robustness.

A system and method for minimizing printhead density differences is disclosed, which includes printing a first test patch onto a first print at one or more halftone levels using a print head array may include more than one print head, scanning the first test patch, calculating an average print density of the first test patch for each print head and an average print density for the print head array, adjusting a drive voltage for each print head to match the average print density of the first test patch for the print head array, printing a second test patch onto a second print at one or more halftone levels using the print head array, scanning the second test patch. The method includes calculating an average print density of the second test patch for each print head and an average print density for the print head array.

This invention provides a halftone method for halftone error diffusion in inkjet printing, comprising: S1. generating a checkerboard halftone screen; S2. color space conversion; S3. performing halftone processing, i.e., error diffusion processing, based on the results of steps S1 and S2; and S4. image synthesis. In this method, the 4×4 checkerboard design effectively controls noise and makes the distribution of adjacent pixels more uniform; the checkerboard format better simulates the characteristics of ink droplets in an inkjet printer; the screen size can be flexibly adjusted according to the actual effect, providing better adaptability; and combined with the error diffusion method, it ensures the fidelity of image details.

The present application relates to the technical field of image hard copy reproduction, in particular to a reversible halftone method and system based on dynamic noise, comprising: constructing a reversible halftone model, including a halftone generation network and a recovery network; passing the original color image through the halftone generation network of the reversible halftone model, outputting a reversible halftone image; and passing the reversible halftone image through the recovery network, outputting a recovered color image. The present application improves the quality of the halftone image, improves the detail accuracy and color restoration degree of the reversible halftone image, ensures that the recovered color image reflects all details and color ranges of the original color image as much as possible, and improves the image processing efficiency.

The present application relates to the technical field of halftone, in particular to a multi-level halftone method and system based on image partition error diffusion, comprising: dividing the input original image into flat regions and non-flat regions, and using gray level replacement quantization in the flat regions to increase the high-frequency blue noise characteristics of the halftone result, forming a distribution close to blue noise to reduce the banding distortion that can be observed by the human eye, while introducing an edge preservation mechanism in the non-flat regions, calculating the cumulative weight error according to the texture information in the texture region information mask, and introducing the propagation error in the total error to avoid the edge pixels in the image being affected by the error of the adjacent pixels, protect the edge details, and avoid the degradation of the edge details. The present application can alleviate the banding artifact phenomenon in the flat region, protect the texture and edge details, can provide halftone characteristics close to the ideal, and improve the output quality of the halftone image.

This invention discloses a method and system for preparing and identifying anti-counterfeiting printed materials based on halftone frequency compensation. The method includes determining the compensation frequency of the embedded texture to be embedded in the original digital image based on the frequency of the visible moiré patterns induced when the anti-counterfeiting printed material is copied; designing an embedded texture based on halftone frequency compensation according to the compensation frequency to generate a digital image containing the embedded texture; and outputting the digital image containing the embedded texture onto a printing substrate through a printing device to obtain the anti-counterfeiting printed material. This invention aims to utilize the active induction mechanism of moiré patterns to actively induce moiré features in the frequency domain and micro-texture at the moment of imaging of the copy, transforming the identification of copies from searching for weak signals to detecting significant interference, thereby improving the stability of anti-counterfeiting printed material identification in complex media and cross-brand device application scenarios.

This invention provides a depth-optimized 3D color control method based on color printing materials, comprising: constructing a primary color material system, classifying and assigning it to corresponding primary color channels according to the transparency properties of the printing materials; performing voxelization on the 3D model to be printed, and dividing the object surface voxels into multiple logical layers corresponding to the number of primary color channels inward along the normal direction based on a directed distance field; independently performing 3D halftone screening within each logical layer to generate an initial voxel binary distribution for each primary color channel; based on a physical optics model, using depth units formed along the surface voxel normal direction as the basic evaluation unit, keeping the total volume coverage of each primary color channel material constant, iteratively optimizing the initial voxel binary distribution through local voxel exchange operations, and using the resulting voxel distribution for 3D color printing. This invention can control the optical transmission path of multi-layer semi-transparent materials, significantly improving the accuracy of 3D printing color reproduction.