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EP0159691A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Color image display system

Assignee: International Business Machines Corp
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Filing: 1985-04-23
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Granted: —
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Expires: 2005-04-23
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Abstract

Abstract A color quantization system is provided for color image display, which determines a predetermined number of displaying colors for each given frame image in the following manner; (A) calculate a popularity or the number of pels within each sub-space defined on the whole color space (12); (B) select the largest number M of above popularities (22); (C) determine the color representing the sub-space which has the largest popularity, as one of the above displaying colors, if is satisfied, wherein nr is the number of undetermined display color, and N is the number of the pels which are not mapping onto the determined display colors (24); (D) increment the size of the sub-space if is not satisfied (26). nr This color quantization system is effective for eliminating the controuring effect. Furthermore, the algorithm is very simple.

Inventors

  • 👤 Yoshio Tozawa

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-29 08:42
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/14; G06F3/153; H; H04; H04N; H04N1/00; H04N1/46; H04N1/64; H04N1/644

Claims Analysis

Total Claims: 1
Claim 1
Independent Claim 174 words
A color quantization system for color image display comprising: means for calculating the number of pels within each sub-space defined on a whole color space; means for selecting the sub-space which has the largest number of pels from sub-spaces other than the sub-spaces represented by the displaying colors which have already been determined; means for determining whether the requirement, M ≧ is satisfied or not, wherein M is said largest number of pels, A is the number of all the pels of a color image to be displayed, B is the number of pels in the sub-spaces represented by the displaying colors which have already been determined, n 1 is the number of all the displaying colors, and n 2 is the number of the displaying colors which have already been deter ined; means for selecting the color representing the sub-space which has the largest number of pels, as one of the displaying colors, when said requirement is satisfied; and means for incrementing the size of the sub-space, when said requirement is not satisfied.

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