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公开(公告)号：US20200279538A1
公开(公告)日：2020-09-03
申请号：US16289260
申请日：2019-02-28
申请人： ATI Technologies ULC
发明人： Keith Lee , David I. J. Glen , Jie Zhou , Yuxin Chen
IPC分类号： G09G5/06
摘要： Systems, apparatuses, and methods for reducing three dimensional (3D) lookup table (LUT) interpolation error while minimizing on-chip storage are disclosed. A processor generates a plurality of mappings from a first gamut to a second gamut at locations interspersed throughout a 3D representation of the pixel component space. For example, in one implementation, the processor calculates mappings for 17×17×17 vertices within the 3D representation. Other implementations can include other numbers of vertices. Rather than increasing the number of vertices to reduce interpolation error, the processor calculates mappings for centroids of the sub-cubes defined by the vertices within the 3D representation of the first gamut. This results in a smaller increase to the LUT size as compared to increasing the number of vertices. The centroid mappings are used for performing tetrahedral interpolation to map source pixels in the first gamut into the second gamut with a reduced amount of interpolation error.
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公开(公告)号：US12033273B2
公开(公告)日：2024-07-09
申请号：US17972307
申请日：2022-10-24
申请人： ATI TECHNOLOGIES ULC
发明人： David I. J. Glen , Keith Lee
CPC分类号： G06T15/503 , G06T7/90 , G06T11/001 , G06T2210/62
摘要： In some examples, an apparatus obtains source layer pixels, such as those of a content image and first destination layer pixels, such as those of a destination image. The first destination layer pixels have associated alpha values. The apparatus obtains information that indicates a first blending color format for the alpha values. The first blending color format is different from a first destination layer color format for the first destination layer pixels and an output color format for a display. The apparatus converts the source and/or first destination layer pixels to the first blending color format. The apparatus generates first alpha blended pixels based on alpha blending the source layer pixels with the first destination layer pixels using the associated alpha values. The apparatus provides, for display on the display, the first alpha blended pixels.
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公开(公告)号：US20220405889A1
公开(公告)日：2022-12-22
申请号：US17354856
申请日：2021-06-22
申请人： ATI Technologies ULC
发明人： Vladimir Lachine , Keith Lee
摘要： Systems, apparatuses, and methods for performing optimized sharpening of images in non-linear and linear formats are disclosed. A system includes a blur filter and a sharpener. The blur filter receives an input image or video frame and provides blurred output pixels to a sharpener unit. The sharpener unit operates in linear or non-linear space depending on the format of the input frame. The sharpener unit includes one or more optimizations to generate sharpened pixel data in an area-efficient manner. The sharpened pixel data is then driven to a display.
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公开(公告)号：US20210383772A1
公开(公告)日：2021-12-09
申请号：US17407981
申请日：2021-08-20
申请人： ATI Technologies ULC
发明人： Keith Lee , David I. J. Glen , Jie Zhou , Yuxin Chen
IPC分类号： G09G5/06
摘要： Systems, apparatuses, and methods for reducing three dimensional (3D) lookup table (LUT) interpolation error while minimizing on-chip storage are disclosed. A processor generates a plurality of mappings from a first gamut to a second gamut at locations interspersed throughout a 3D representation of the pixel component space. For example, in one implementation, the processor calculates mappings for 17×17×17 vertices within the 3D representation. Other implementations can include other numbers of vertices. Rather than increasing the number of vertices to reduce interpolation error, the processor calculates mappings for centroids of the sub-cubes defined by the vertices within the 3D representation of the first gamut. This results in a smaller increase to the LUT size as compared to increasing the number of vertices. The centroid mappings are used for performing tetrahedral interpolation to map source pixels in the first gamut into the second gamut with a reduced amount of interpolation error.
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5.发明申请公开(公告)号：US20200007718A1
公开(公告)日：2020-01-02
申请号：US16022999
申请日：2018-06-29
申请人： ATI Technologies ULC
发明人： Keith Lee
摘要： A method and apparatus obtains a source image having a plurality of source color gamut pixels in a source color gamut. The method and apparatus converts the plurality of source color gamut pixels to a plurality of corresponding target color gamut pixels using non-linear interpolation of a plurality of output pixel values from a reduced 3-D look-up table (LUT) for a target color gamut. The method and apparatus provides, for display, the plurality of target color gamut pixels (e.g., one or more pixels) on a target color gamut display.
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公开(公告)号：US20230144311A1
公开(公告)日：2023-05-11
申请号：US17523762
申请日：2021-11-10
申请人： ATI Technologies ULC
发明人： Keith Lee , Isobel Lees
IPC分类号： G06T5/00
CPC分类号： G06T5/009 , G06T5/001 , G06T2207/20024 , G06T2207/20224
摘要： Systems, apparatuses, and methods for detecting and mitigating scaling artifacts caused by high chromatic colors in adjacent pixels are disclosed. A blend factor calculation circuit determines if high chromatic colors are in close proximity to each other in a set of pixel data of an image or frame. The blend factor calculation circuit generates a blend factor value to suppress artifacts which are introduced when filtering the set of pixel data when the set of pixel data has high chromatic colors in close proximity. In one scenario, the blend factor calculation circuit calculates pixel component difference values of adjacent pixels and uses a value calculated based on the difference values as an input to a transfer function. The output of the transfer function is a blend factor value which determines how filtering is blended between a plurality of filters.
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公开(公告)号：US11115563B2
公开(公告)日：2021-09-07
申请号：US16022999
申请日：2018-06-29
申请人： ATI Technologies ULC
发明人： Keith Lee
摘要： A method and apparatus obtains a source image having a plurality of source color gamut pixels in a source color gamut. The method and apparatus converts the plurality of source color gamut pixels to a plurality of corresponding target color gamut pixels using non-linear interpolation of a plurality of output pixel values from a reduced 3-D look-up table (LUT) for a target color gamut. The method and apparatus provides, for display, the plurality of target color gamut pixels (e.g., one or more pixels) on a target color gamut display.
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公开(公告)号：US12020408B2
公开(公告)日：2024-06-25
申请号：US17354856
申请日：2021-06-22
申请人： ATI Technologies ULC
发明人： Vladimir Lachine , Keith Lee
CPC分类号： G06T5/73 , G06T5/20 , G06T5/50 , G06T5/70 , G06T2207/10024
摘要： Systems, apparatuses, and methods for performing optimized sharpening of images in non-linear and linear formats are disclosed. A system includes a blur filter and a sharpener. The blur filter receives an input image or video frame and provides blurred output pixels to a sharpener unit. The sharpener unit operates in linear or non-linear space depending on the format of the input frame. The sharpener unit includes one or more optimizations to generate sharpened pixel data in an area-efficient manner. The sharpened pixel data is then driven to a display.
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公开(公告)号：US20230096874A1
公开(公告)日：2023-03-30
申请号：US17488982
申请日：2021-09-29
申请人： ATI Technologies ULC
发明人： Keith Lee , Edward George Callway , Isobel Lees
摘要： Systems, apparatuses, and methods for implementing content adaptive processing via ringing estimation and suppression are disclosed. A ring estimator estimates the amount of ringing when a wide filter kernel is used for image processing. The amount of ringing can be specified as an under-shoot or an over-shoot. A blend factor calculation unit determines if the estimated amount of ringing is likely to be visually objectionable. If the ringing is likely to be visually objectionable, then the blend factor calculation unit generates a blend factor value to suppress the objectionable ringing. The blend factor value is generated for each set of source pixels based on this determination. The blend factor value is then applied to how the blending is mixed between narrow and wide filters for the corresponding set of source pixels. The preferred blending between the narrow and wide filters is changeable on a pixel-by-pixel basis during image processing.
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公开(公告)号：US11488349B2
公开(公告)日：2022-11-01
申请号：US16455947
申请日：2019-06-28
申请人： ATI TECHNOLOGIES ULC
发明人： David I.J. Glen , Keith Lee
摘要： In some examples, an apparatus obtains source layer pixels, such as those of a content image and first destination layer pixels, such as those of a destination image. The first destination layer pixels have associated alpha values. The apparatus obtains information that indicates a first blending color format for the alpha values. The first blending color format is different from a first destination layer color format for the first destination layer pixels and an output color format for a display. The apparatus converts the source and/or first destination layer pixels to the first blending color format. The apparatus generates first alpha blended pixels based on alpha blending the source layer pixels with the first destination layer pixels using the associated alpha values. The apparatus provides, for display on the display, the first alpha blended pixels.
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