287 results about "Pixel correlation" patented technology

An electronic display comprises an electro-optic material (preferably an electrophoretic medium) having a plurality of pixels, and separate first, second and third sets of addressing means for addressing these pixels. Each of the pixels is associated with one addressing means in each of the three sets, such that addressing of any specific pixel requires application of signals within predetermined ranges to each of the three addressing means associated with the specific pixel being addressed.

<heading lvl="0">Abstract of Disclosure< / heading> An electronic display comprises an electro-optic material (preferably an electrophoretic medium) having a plurality of pixels, and separate first, second and third sets of addressing means for addressing these pixels. Each of the pixels is associated with one addressing means in each of the three sets, such that addressing of any specific pixel requires application of signals within predetermined ranges to each of the three addressing means associated with the specific pixel being addressed.

The present invention relates to a processing device and a method of providing privacy for a display device comprising a display panel arranged to display a first image signal (405), the display panel having an off-axis tonal reproduction curve that is different from the on-axis tonal reproduction curve of the display panel, and the display panel comprising a group of adjacent subpixels, wherein subpixels of the group of adjacent subpixels contribute at least a common primary color component, and wherein the group of adjacent subpixels associated with at least one pixel; the method comprising modulating control signals of individual subpixels of the group of adjacent subpixels, using a second image signal (425), the control signals arranged to generate tonal values for at least two of the individual subpixels of the group of adjacent subpixels that are at least in part decorrelated from the first image signal when viewed off-axis, and to generate tonal values for the group of adjacent subpixels that on average correspond to the first image signal when viewed on-axis.

A correlation function peak finding method for an image correlation displacement sensing system is provided. The method may include capturing a reference image and a displaced image, and searching for an initial peak correlation function value point (CFVP) with pixel-level resolution based on correlating the reference image and displaced images at a plurality of offset positions. Then a complete set of CFVPs may be determined at each offset position in an analysis region surrounding the initial peak CFVP. Then a preliminary correlation function peak location is estimated with sub-pixel resolution, based on CFVPs included in the analysis region. Finally, curve-fitting operations are performed to estimate a final correlation function peak location with sub-pixel accuracy, wherein the curve-fitting operations apply a windowing function and / or a set of weighting factors that is / are located with sub-pixel resolution based on the preliminary sub-pixel correlation function peak location.

The present invention provides a scheme for compressing the color components of image data, and in particular, data used in multi-sampled anti-aliasing applications. Adjacent pixels are grouped into rectangular tiles, with the sample colors stored in compressed formats accessible via an encoded pointer. In one embodiment, duplicate colors are stored once. Unlike prior compression schemes that rely on pixel to pixel correlation, the present invention takes advantages of the sample to sample correlation that exists within the pixels. A memory and graphics processor configuration incorporating the tile compression schemes is also provided. The configuration defines the tile sizes in main memory and cache memory. In one embodiment, graphics processor relies on a Tile Format Table (TFT) to process incoming tiles in compressed formats. The present invention reduces memory consumption and speeds up essential and oft-repeated operations in rendering. Thus it is valuable in the design and manufacture of graphic sub-systems.

A display controller is disclosed. Display controllers are known but they are typically optimised to suit displays arranged in one orientation. Increasingly, displays are provided which may be used in a variety of orientations. Accordingly, a display controller (5′) is provided for controlling a display (40) having a plurality of pixels (60) forming a frame, the frame comprising a plurality of lines of the pixels. Frame storage means (20) is provided which is operable to store a frame of pixel values arranged as a plurality of adjacent tiles (70; 70′; 70″; 70′″), each tile comprising a plurality of pixel values, each pixel value being associated with a pixel of the display. A plurality of line buffers (80; 80′; 80″) are provided, each line buffer being operable to store a line of pixel values of the frame. Also, tile selection logic (10′) is provided which is operable to retrieve tiles from the frame storage means and to provide the tiles to the line buffers for subsequent supply to the display, the tile selection logic being operable to receive an indication of rotation of the display, and to retrieve the tiles in an order dependent on the indication of rotation so as to cause a counter-rotated frame to be displayed in the event that the display is rotated. The order of retrieval of the tiles from the frame buffer is dependent upon the orientation of the display. Hence, when the display is rotated to a new orientation, the tile selection logic can then retrieve adjacent tiles from the frame storage means in a different order to thereby cause the frame to be displayed on the display in a manner which counters the effect of its rotation. Through this approach, it will be appreciated that the pixel values in the frame storage means are not required to be updated to account for any change in rotation of the display. Furthermore, access efficiency is maintained by retrieving data from the frame storage means since complete tiles comprising a plurality of pixels are retrieved instead of retrieving individual pixels.

A method for classifying an image as one of color and neutral assigns respective values associated with a plurality of pixels in the image to a plurality of respective current pixels. Reduced image pixels are produced as a function of the current pixels. The image is classified as one of neutral and color as a function of the reduced image pixels.