Image processing device

An image processing device configured to divide an image imaged by imaging means into a plurality of regions, said image processing device comprising:

• processing means configured to group, in the case that difference of the pieces of image data between a single pixel within said image and a pixel adjacent thereto is less than a predetermined first threshold, said single pixel and said adjacent pixel, and to divide said image into a plurality of regions with finally obtained each group as each region of said image;
• and
• average-value calculating means configured to calculate the average value of said image data within said group including said single pixel;
• wherein said processing means compare the image data of said single pixel, and said average value calculated at said average-value calculating means regarding said group to which said adjacent pixel belongs, and in the case that the difference thereof is equal to or greater than a predetermined second threshold, do not group said single pixel and said adjacent pixel.