| 摘要 |
The blurring determination device references image data in which are recorded coefficients that are obtained when pixel values forming the image in the spatial domain are converted to the frequency domain, and detects edges oriented in two or more directions, from among the image data, by comparing a series of the coefficients in each of the directions with various types of basic edge patterns whereby typical gradient patterns of the changes in pixel values are represented by values corresponding the coefficients. The representative values of the width of the detected edges is determined in each of the directions, and the image data is determined to not be blurred when the representative values meet the condition of being at or below a certain threshold.
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