Image processing method and image processing program

摘要

In an image processing method, first, one point is designated on input image data as a start point of a retrieval line by external input. Subsequently, one point, which is different from the start point, is designated on the input image data as an endpoint of the retrieval line by the external input. Subsequently, a cumulative line profile of the retrieval line is prepared by calculating a cumulative sum of luminance values on the retrieval line. Subsequently, an edge position on the retrieval line is calculated based on the cumulative line profile of the retrieval line.