摘要:
A system for compressing and transmitting a digital image signal over a limited bandwidth communication channel, transform codes the image values and quantizes the transform coefficients according to a two-dimensional model of the sensitivity of the human visual system. The model of the human visual system is characterized by being less sensitive to diagonally oriented spatial frequencies than to horizontally or vertically oriented spatial frequencies, thereby achieving increased compression of the image.
摘要:
In a method and apparatus for transmitting a digital image over a limited bandwidth communication channel, an image is block transformed to produce blocks of transform coefficients; the transform coefficients are quantized in accordance with a model of the visibility of quantization error in the presence of image detail; the quantized coefficients are encoded with a minimum redundancy code; and the coded, quantized transform coefficients are transmitted.
摘要:
A still image communication system performs a block cosine transformation on an image of bandwidth compression. A transmitter subsamples a full resolution image, to provide a preview image, and transforms and transmits the preview image prior to transforming and transmitting the full resolution image. A receiver and displays the preview image, and replaces the preview image on the display block-by-block as the full resolution is received.
摘要:
In accordance with the present invention, the R,G,B color image signals from a single sensor having a color filter array are all transformed to .GAMMA.-space by changing them to R.sup.1/.GAMMA., G.sup.1/.GAMMA., B.sup.1/.GAMMA., respectively, where .GAMMA. is approximately 2.4. In this space, all operations such as color differencing, interpolation of those missing pixels required for color differencing, compression, decompression, edge enhancement and final interpolation of all missing pixels are performed without further transformation of the image signals. For the same final bit rate, noise in the reproduced image is reduced by refraining from interpolating the missing color pixels prior to compression of the image data. In order to avoid over-emphasizing features of the image which are already sufficiently sharp, the combined outputs of horizontal and vertical sharpening processes are subjected to a paring process of the invention which suppresses strong high-spatial frequency components as a function of their amplitude. In the compression-decompression process of the invention, each spatial frequency coefficient of the spatial frequency-transformed image is divided by a normalization factor determined by cascading in the spatial frequency domain the human visual system contrast sensitivity function, the edge enhancement modulation transfer function and the image display modulation transfer function and inversing the resulting matrix elements.
摘要:
A pair of glasses suitable for viewing stereoscopic content from a display includes a left lens to receive a left image from said display and a right lens to receive a right image from said display. A viewer adjustable adjustment mechanism, said as a knob permits adjustment resulting in a directional shifting of the left image with respect to said the image for the stereoscopic image.
摘要:
A display includes an integrated imaging sensor and a plurality of pixels. The imaging sensor integrated within the display includes a plurality of individual sensors each of which provides an output. The content of the display is modified based upon the sensed content.
摘要:
Systems and devices for, and methods of, frequency separation and spatialization of audio content, by: (a) filtering a stream content; (b) transmitting the filtered stream content via a plurality of speaker channels, wherein at least one of the speaker channels of the plurality of speaker channels comprises an amplitude gain based on a display position set; and optionally (c) generating an inversion of the filtered stream content; and (d) combining the inverted filtered stream content with the stream content to generate a low frequency component of the audio content.
摘要:
A backlit display with improved dynamic range. The disclosed display illuminates a pixel of the display at respective non-zero illumination levels during each of a first frame and a second frame and decreases the illumination level of the pixel during the interval between the first frame and the second frame.
摘要:
Embodiments of the present invention comprise systems and methods for surround-specific display modeling in which the brightness of a display is varied based on a perceptual brightness model that is expressed as a function of the illumination level that surrounds a display as it is being perceived by a viewer.
摘要:
A backlit display with improved dynamic range. The disclosed display illuminates a pixel of the display at respective non-zero illumination levels during each of a first frame and a second frame and decreases the illumination level of the pixel during the interval between the first frame and the second frame.