发明名称 |
Method for determining scan line misalignments |
摘要 |
A test image has a black bias on a white background. The black bias is a line set at about 45 degrees to the scan lines of a scanner. Boundary points of the scanned bias are found. A regression line is calculated from the positions of the boundary points. Differences in the positions of adjacent boundary points, together with the slope reciprocal of the regression line, are used to determine error values. The error values are compared with a gate value to determine if there are any occurrences of scan line misalignment.
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申请公布号 |
US2001019431(A1) |
申请公布日期 |
2001.09.06 |
申请号 |
US20000740898 |
申请日期 |
2000.12.21 |
申请人 |
TSAI YU-FEN;CHANG TE-CHIH |
发明人 |
TSAI YU-FEN;CHANG TE-CHIH |
分类号 |
H04N1/00;H04N1/10;H04N1/193;(IPC1-7):H04N1/04 |
主分类号 |
H04N1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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