Image processing apparatus, image processing method, and image processing program for clipping images included in a large image

An image processing method by which an image processing apparatus extracts, from image data, a clip image included in the image data, the method comprising:

• obtaining image data;
• extracting, as a candidate region, a region containing an object detectable from the image data;
• generating a candidate region group, based on the extracted candidate region;
• extracting, as a candidate line, a line that is at least either a line segment or an arc included in the image data;
• generating a candidate line group, based on the extracted candidate line;
• determining a degree of overlap between a closed line forming an outline of the generated candidate region group and the generated candidate line group and determining whether the degree of overlap is greater than or equal to a preset predetermined first percentage value;
• and
• extracting the candidate region as a clip image, if it is determined that the degree of overlap is greater than or equal to the first percentage value,
• wherein the candidate region is a rectangular region, and the candidate line is a line segment of a straight line.

A non-transitory computer readable medium storing an image processing program for causing a computer to function as an image processing apparatus that extracts, from image data, a clip image included in the image data, the program for causing the computer to:

• obtain image data;
• extract, as a candidate region, a region containing an object detectable from the image data;
• generate a candidate region group, based on the candidate region extracted;
• extract, as a candidate line, a line that is at least either a line segment or an arc included in the image data;
• generate a candidate line group, based on the candidate line extracted;
• determine a degree of overlap between a closed line forming an outline of the candidate region group generated and the candidate line group generated and determine whether the degree of overlap is greater than or equal to a preset predetermined first percentage value;
• and
• extract the candidate region as a clip image, upon determination that the degree of overlap is greater than or equal to the first percentage value,
• wherein the candidate region is a rectangular region, and the candidate line is a line segment of a straight line.