Patent ID: 8767232

Claim:
An image processing apparatus configured to determine a correction parameter used for line width correction from among a plurality of candidate parameters, the image processing apparatus comprising: an output unit configured to output a line width chart obtained by printing a plurality of straight lines subjected to line width correction using the plurality of candidate parameters as line width patches; a reading unit configured to read the line width chart output by the output unit to acquire respective images of the line width patches; an acquisition unit configured to acquire pixel values of pixels in the images of the line width patches acquired by the reading unit; a generation unit configured to generate, for each of the line width patches, a line width profile representing a distribution of the pixel values acquired by the acquisition unit; a storing unit configured to store a reference profile representing a distribution corresponding to a predetermined line width; and a determination unit configured to determine the correction parameter from among the plurality of candidate parameters based on a comparison between the distribution represented by each line width profile generated by the generation unit and the distribution represented by the reference profile stored in the storing unit.