Patent ID: 9185240
Filing Date: 2015-11-10
Classification: H04N

Abstract:
1. An image test apparatus that tests at least one read image obtained by reading at least one image formed and output on at least one sheet by an image forming apparatus, the image test apparatus comprising: an image generating unit configured to acquire an output target image with which the at least one image is formed and output by the image forming apparatus, and generate a test image for testing the at least one read image; an image test unit configured to determine a defect of each of pixels of the at least one read image based on a difference between a density of each of pixels in the test image and a density of each of the pixels in the at least one read image, each of the pixels in the at least one read image corresponding respectively to each of the pixels in the test image; a defect number determining unit configured to determine number of defects contained in the at least one read image based on a determination result of the defect of the at least one read image; a frequency distribution generating unit configured to accumulate defect numbers of multiple read images, each of the defect numbers being the number of defects detected in one read image, and generate a frequency distribution of the defect numbers; and an abnormality determination unit configured to determine an abnormality of the image forming apparatus based on a change in the frequency distribution generated for each predetermined period.