摘要:
Nonlinear compression of high precision image data (e.g., 12-bits per subpixel) conventionally calls for a large sized lookup table (LUT). A smaller sized and tunable circuit that performs compression with piecewise linear compressing segments is disclosed. The piecewise linear data compressing process is organized so that lumping together of plural ‘used’ high precision value points into one corresponding low precision data value point is avoided or at least minimized. In one embodiment, the compressed data is image defining data being processed for display on a nonconventional display screen where the piecewise linearly compressed data can be stored adjacent to other image data in a frame buffer where a composite image is assembled.
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:
A display system and method for displaying an image on the display system are provided. The display system includes a display panel and a backlight for illuminating the display panel, the backlight including one or more light emitting zones that each emit light in response to a backlight drive value. The display system further includes a backlight selection module for selecting the backlight drive value for each light emitting zone from image data, an effective backlight module that generates effective backlight signals using light spread information for the backlight and the backlight drive values, and a module for modulating the image data according to the effective backlight signal and providing the modulated image data to the display panel. The light spread information includes information representing the contribution of light from each light emitting zone over the display panel.
摘要:
The embodiments disclosed herein comprise a plurality of modules and means to provide effect dynamic gamut mapping and backlight control. In one embodiment, a display system comprises: a transmissive display, said display comprising a plurality of colored subpixels wherein one such colored subpixel is substantially wide spectrum bandpass; a transmissive display controller, said display controller providing signals to said transmissive display to set the amount of transmissivity of each said colored subpixel; a backlight, said backlight providing illumination to said transmissive display; a backlight controller, said controller providing signals to said backlight to modulate the amount of illumination provided by said backlight to said transmissive display; peak surveying module for surveying image data and extracting the image gamut hull for providing intermediate backlight data signals to said backlight controller to match said image gamut hull; and a means for normalizing display image data signals according to said intermediate backlight data signals and providing said normalized image data as intermediate display data.
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:
Systems and methods of rendering image data to multiprimary displays that adjusts image data across metamers are herein disclosed. The metamer filtering may be based upon input image content and may optimize sub-pixel 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 capable of selecting from a set of image data values, said set 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 a selection unit, said unit selecting image data from said metamer according to said spatial frequency characteristic.
摘要:
A method of determining implied sample areas for each data point of each color in a source pixel data specified in a first sub-pixel format is used for sub-pixel rendering an image on a display specified in a second sub-pixel format. Each of the first and second sub-pixel formats comprises a plurality of colored sub-pixels. The method comprises determining a geometric center of each colored sub-pixel of the first format to define a sampling point; and defining each implied sample area by forming lines that are substantially equidistant between the sampling point of one colored sub-pixel and the sampling point of another neighboring same color colored sub-pixel. A similar technique may be used for determining resample areas for computing color values for rendering an image specified in a first sub-pixel format on a display substantially comprising a plurality of colored sub-pixels arranged in a second sub-pixel format.
摘要:
Displays systems and methods for producing a single scaling factor to image data values are disclosed. In one embodiment of a display system uses a post-scaling module. A post-scaling unit for scaling image data values is constructed as a function of many scaling requirements such as backlight illumination from said illumination determination unit, saturation of the image data values and out-of-gamut correction—to produce a single scaling factor. This single scaling factor may be a function of a number of scaling requirements as described herein. Some of these scaling requirements could be selected from a group scaling considerations, such as saturation based scaling, out-of-gamut scaling, and non-linear scaling. Of course, other scaling requirements may be desired and could be added as such. As further described herein, the non-linear scale module could be used to enhance dark color values and may depend on the luminance value of image data values. Once these scaling requirements are determined, there are a multitude of ways of combining them to create such a single scaling factor—including multiplying them or taking the minimum of them or a combination thereof.
摘要:
The present application discloses methods and system for converting input image data in a first color space into image data in a second color space format. Several embodiments disclose improved techniques for performing these conversions using inexpensive hardware and software implementations.
摘要:
The embodiments disclosed herein comprise a plurality of modules and means to provide effect dynamic gamut mapping and backlight control. In one embodiment, a display system comprises: a transmissive display, said display comprising a plurality of colored subpixels wherein one such colored subpixel is substantially wide spectrum bandpass; a transmissive display controller, said display controller providing signals to said transmissive display to set the amount of transmissivity of each said colored subpixel; a backlight, said backlight providing illumination to said transmissive display; a backlight controller, said controller providing signals to said backlight to modulate the amount of illumination provided by said backlight to said transmissive display; peak surveying module for surveying image data and extracting the image gamut hull for providing intermediate backlight data signals to said backlight controller to match said image gamut hull; and a means for normalizing display image data signals according to said intermediate backlight data signals and providing said normalized image data as intermediate display data.