Patent
Method and apparatus for pseudo-random noise generation based on variation of intensity and coloration
TLDR
In this article, the authors proposed a method and apparatus for dithering for color computer display systems that includes the addition of a noise component to each of the color components of each pixel in a pseudo-random manner.Abstract:
A method and apparatus for dithering for color computer display systems includes the addition of a noise component to each of the color components of each pixel in a pseudo-random manner. The noise component is preferably different for each color component. Taking the image as a whole, the noise component repeats on a regular basis but is preferably selected so as not to repeat on adjacent pixels. The image is divided into squares of pixels and the same noise component is added to each of the same relative pixels from square to square. The preferred square of pixels is four pixels wide by four pixels high. The value of the noise component is chosen such that the most significant bit alternates both horizontally and vertically from pixel to pixel within the square of pixels. The other bits of the value of the noise component are preferably chosen such that the value of the noise component does not repeat within the square of pixels and such that a simplified hardware implementation is made possible by their selection. The resulting hardware implementation preferably consists of a number of exclusive-or gates tied together to produce the value of the noise component based on the least significant bits of the X and Y coordinates of each pixel. This hardware implementation is simple enough that it becomes economically practical to add a different noise component to each of the three color components of each pixel rather than the same noise component to all of the color components.read more
Citations
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Patent
Method and apparatus for driving plasma display panel
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Patent
Dithering method and dithering device
TL;DR: In this article, a dithering method for assigning a digital value of N bits to a pixel, wherein the image signal comprises a pixel value of M bits, wherein M is greater than N (M>N) and where the random values which are added to two or more adjacent pixels values are mutually correlated.
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Apparatus and method for dithering in image processing and computer graphics systems
Hai-Wei Wang,Chung-Yen Lu +1 more
TL;DR: In this article, a method for converting N-bit image data of a digital image into M-bit data, in which N−M=K, K>0, is disclosed.
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Modified weighted bit planes for displaying grey levels on optical arrays
TL;DR: In this paper, a weighted bit plane technique is used for multi-level spatial light modulation, where an n-digit binary number represents the intended grey level of each pixel location in an array of binary pixels, representative binary numbers are altered to closely adjacent values such as to reduce the inequality of 1s and 0s therein.
References
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Patent
Image editing system including masking capability
TL;DR: In this paper, a system and method for editing digital images in three dimensions includes a computer for storing a digital image of an object and a background, as well as at least one additional background image.
Patent
Apparatus and method for distinguishing events which collectively exceed chance expectations and thereby controlling an output
G. Johnston Bradish,York Dobyns,Brenda J. Dunne,Robert G. Jahn,R. D. Nelson,John E. Haaland,Steven M. Hamer +6 more
TL;DR: In this paper, a method and apparatus of generating values and detecting whether the values fall outside chance probabilities is presented, where a random-noise source provides a signal that is amplified, conditioned, and sampled to provide a series of random numbers.
Patent
Method of color image enlargement in which each RGB subpixel is given a specific brightness weight on the liquid crystal display
TL;DR: In this article, a method and apparatus for displaying an enlarged image on a liquid crystal display apparatus capable of displaying colors is described, which can enlarge an image at an arbitrary ratio and display the outline of the enlarged image smoothly.
Patent
System and method for dithering and quantizing image data to optimize visual quality of a color recovered image
TL;DR: In this article, a color graphics pipeline has a separate encoder (14r, 14g, 14d) with a dither table (33r, 33g, 33b) for processing each color value (34r, 34g, 34b) in pixel data (33) received from a host processor (12) or rasterizer.
Patent
Method and apparatus for displaying color on a computer output device using dithering techniques
TL;DR: In this article, a method and apparatus for filling an area of a computer display with a preselected color is provided, where four picture elements of a display are logically grouped together to create a super-pel.