| 摘要 |
PROBLEM TO BE SOLVED: To provide a shading data inspection method capable of detecting lines with a similar margin, even near the center region and the end parts of a test chart. SOLUTION: The test chart, in the middle of which a black belt with a prescribed density is printed, is scanned and thereafter, when inspection software captures scanned data, the black belt with a height in 45 dots in the middle of the scanned image is extracted, a value j is set to 0; and thereafter, the standard deviationsσof Line average X(j) of the j-th column, and a matrix average Y(j) are calculated (steps 101 to 104). Then whether the relation Y(j) less (a permissible error<X(j)<Y(j)) plus (allowed error) holds is discriminated far for X(j); and when the X(j) is not within the permissible range, the value j as coordinates whereat a color line or a white stripe is detected is stored, and the processing above is executed for all the columns (steps 105 to 108). Then the relation is discriminated up to the final column, the value j is stored, the value j is converted into coordinates and displayed (steps 109 to 111). COPYRIGHT: (C)2008,JPO&INPIT
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