[특허]Producing a compressed digital image organized into layers corresponding to increasing visual quality levels and providing rate-control of such compressed digital image

[미국특허] Producing a compressed digital image organized into layers corresponding to increasing visual quality levels and providing rate-control of such compressed digital image 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G06K-009/46 G06K-009/54
출원번호	US-0579689 (2000-05-26)
발명자 / 주소	Joshi, Rajan L. Jones, Paul W.
출원인 / 주소	Eastman Kodak Company
대리인 / 주소	Crocker, Pamela R.
인용정보	피인용 횟수 : 61 인용 특허 : 1

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A method for producing a compressed digital image from an input digital image is disclosed, wherein the compressed digital image is organized into layers corresponding to increasing visual quality levels. The input digital image is decomposed to produce a plurality of subbands, each subband having a plurality of subband coefficients. The plurality of subband coefficients of each subband of the decomposed input digital image are quantized to produce a quantized output value for each subband coefficient of each subband. At least one bit-plane is formed from the quantized output values of the subband coefficients of each subband. Each bit-plane of each subband in at least one pass is entropy encoded to produce a compressed bit-stream corresponding to each pass, wherein each subband is entropy encoded independently of the other subbands. A visual significance value is computed for each pass, and a visual quality table is provided that specifies a number of expected visual quality levels and corresponding visual significance values. For each expected visual quality level, a minimal set of passes and their compressed bit-streams that are necessary to achieve the corresponding visual significance value are identified. The compressed bit-streams corresponding to passes are then ordered into layers from the lowest expected visual quality level to the highest expected visual quality level specified in the visual quality table to produce a compressed digital image, wherein each layer includes the passes and their corresponding compressed bit-streams from the identified minimal set corresponding to the expected visual quality level that have not been included in any lower visual quality layers. y color composition, of different portions of a layer. 22. The medium of claim 20, wherein employing a Bayesian approach comprises utilizing a likelihood function to capture evidence provided by the images regarding possible disparity in position of corresponding scene points across different input images. 23. The medium of claim 20, wherein employing a Bayesian approach comprises utilizing a Maximum A-Posterior (MAP) criterion on a number of layers and layer assignment. 24. The medium of claim 18, wherein assigning any remaining pixels into the most likely plane of the most probable scene model comprises utilizing an iterative EM approach for pixel assignment. 25. A machine-readable medium having instructions stored thereon for execution by a processor to perform a method comprising: inputting a three-dimensional scene having a plurality of images, wherein each image is captured from a unique viewpoint of the scene, and wherein each image has a plurality of pixels; determining a plurality of high-entropy pixels of the plurality of pixels of a reference image of the scene; rectifying each image of the scene to the reference image of the scene to compensate for camera rotations resulting from use of unique viewpoints of the scene; using the high entropy pixels for probabilistically determining each of a 1-plane estimation of the scene through a predetermined n-plane estimation of the scene; determining the number of planes of the scene based on the most likely estimation of the 1 to n estimations of the scene via a Bayesian method, and assigning pixels of all images corresponding to the high entropy image regions of the reference image to a corresponding one of the number of planes of the scene; assigning pixels other than the high-entropy pixels into one of the number of planes utilizing an iterative EM approach based on at least one classifying criteria; and outputting at least the planes of the scene. 26. The medium of claim 25, wherein outputting the planes of the scene further comprises outputting each pixel of the images by plane.

이 특허에 인용된 특허 (1) 인용/피인용 타임라인 분석

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[미국특허] Producing a compressed digital image organized into layers corresponding to increasing visual quality levels and providing rate-control of such compressed digital image 원문보기

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[미국특허] Producing a compressed digital image organized into layers corresponding to increasing visual quality levels and providing rate-control of such compressed digital image 원문보기

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