摘要:
Embodiments for providing increased gamma accuracy in quantized display systems are herein described. Both system and method embodiments are provided to enhance image quality in three primary and multiprimary display systems.
摘要:
Systems and methods of rendering image data to multiprimary displays that adjust image data across metamers are herein disclosed. The metamer filtering may be based upon input image content and may optimize subpixel values to improve image rendering accuracy or perception. The optimizations may be made according to many possible desired effects. One embodiment comprises a display system comprising: a display, said display comprising at least a first set of subpixels and a second set of subpixels further comprising at least one metamer; an input image data unit; a spatial frequency detection unit, said spatial frequency detection unit extracting a spatial frequency characteristic from said input image data; and an adjustment unit, said adjustment unit adjusting image data of said first set and said second set of subpixels according to said spatial frequency characteristic.
摘要:
Techniques for low cost gamma mapping convert three-primary input image data, such as RGB data, into a four primary color display color space, such as an RGBW color space, for rendering on the display by calculating a value for W image data based upon the RGB image input data; deriving an allowable value for W based upon a chromaticity specification of the display, and calculating output values for R, G and B image data based upon the allowable W value. A display system receiving input image data specified in three input primary colors includes modules for converting the input image data into image data specifying color values in four display primary colors. A first module determines a value of a first display primary color, and a second module determines the value of second, third and fourth display primary colors by computing a solution set to simultaneous equations based upon the value of the first display primary color
摘要:
The gamma adjustment allows the luminance for the sub-pixel arrangement to match the non-linear gamma response of the human eye's luminance channel, while the chrominance can match the linear response of the human eye's chrominance channels. The gamma correction allows the algorithms to operate independently of the actual gamma of a display device. The sub-pixel rendering techniques disclosed with gamma adjustment can be optimized for a display device gamma to improve response time, dot inversion balance, and contrast because gamma correction and compensation of the sub-pixel rendering algorithm provides the desired gamma through sub-pixel rendering. These techniques can adhere to any specified gamma transfer curve.
摘要:
Systems and methods are herein given to effect a multiple mode display system that may accept multiple input image data formats and output several possible image data format. In a first embodiment, an image processing system comprises: an input that receives a plurality of source image data, said plurality of source image data further comprising a plurality of source image data formats; circuitry that resamples source image data from said source image data format to a plurality of target image data formats; and a display that renders target image data wherein the resolution of the display comprises approximately one half resolution of the largest of said plurality of target image data formats.
摘要:
A hardware-implemented function evaluator performs mathematical calculations at high speeds to generate data values in place of an LUT. The disclosed embodiments can generate a small number of output values from a large number of input values. The calculations can use functions that are monotonically increasing such as, for example, square root, power curves, and trigonometric functions.
摘要:
Displays are provided with circuitry performing color correction to compensate for the displays' luminance and chrominance transfer characteristics. Some techniques are suitable for RGBW displays and for subpixel-rendered displays. Some displays include an external light source (e.g. a backlight unit in LCDs), and the color correction is coordinated with dynamic control of the light source.
摘要:
Display systems and image processing methods process pre-subpixel rendered images embedded in input color image data. The display systems include a pre-subpixel rendered (P-SPR) image detector that detects locations of a marking code that marks the portion of the input data that has been pre-subpixel rendered and which is ready for direct display. Several display system embodiments comprise first and second image data paths; the input data that requires subpixel rendering proceeds along the first path while the P-SPR image data proceeds along the second path. Another display system embodiment processes the combined input and P-SPR data along a single data path. Techniques for marking and detecting P-SPR image data using two distinct marking codes are presented in the context of the subpixel layout of the display. Techniques for using P-SPR data to display high-quality graphical symbols (e.g., font glyphs) are suitable for small, low-cost display devices.
摘要:
In a first embodiment, a display system comprises a display panel with 4 or more colored subpixels. The display system receives input image data specified in a first color space and outputs image data specified in a second color space. The display system further comprises a gamut mapping module for mapping the input image data specified in the first color space to image data specified in the second color space. The gamut mapping module clamps out-of-gamut colors using at least a first clamping system and a second clamping system. The first and second clamping systems yield first and second clamped values. A weighting module produces a resulting clamped value from the first and second clamped values. A final output image value is derived from the resulting clamped value. Other embodiments of the display system include pre-reduction modules and adjustable GMA modules.
摘要:
Techniques for modifying aspects of the gamut mapping function in a multi-primary display system influence the performance of the display or the perception of certain ones of the colors. One embodiment of the system comprises a method for selecting a metamer. Other embodiments provide methods for modifying the output color produced by the gamut mapping operation for input colors that are on the darker or brighter surfaces of the input color gamut, or for certain out-of-gamut colors such as yellow colors.