Invention Grant
US5150428A Method for generating halftone image data with randomly selected
threshold array
失效
用于通过随机选择的阈值阵列生成黑客图像数据的方法
- Patent Title: Method for generating halftone image data with randomly selected threshold array
- Patent Title (中): 用于通过随机选择的阈值阵列生成黑客图像数据的方法
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Application No.: US677933Application Date: 1991-04-01
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Publication No.: US5150428APublication Date: 1992-09-22
- Inventor: Anthony J. Leone , Kevin E. Spaulding
- Applicant: Anthony J. Leone , Kevin E. Spaulding
- Applicant Address: NY Rochester
- Assignee: Eastman Kodak Company
- Current Assignee: Eastman Kodak Company
- Current Assignee Address: NY Rochester
- Main IPC: H04N1/405
- IPC: H04N1/405
Abstract:
In the present invention each input pixel value is compared against a randomly selected threshold value to provide an output pixel having a value indicative of which of the values is greater. The threshold value is selected from one of a plurality of threshold matrices, each having a predetermined number of threshold values that are arranged in a pattern with the values for a base matrix being increased by an increment for each succeeding one of the plurality of threshold matrices. The selection of the one threshold matrix is made by means of a pseudo-random number generator.
Public/Granted literature
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