Patent ID: 8649625
Filing Date: 2014-02-11
Classification: G06T,H04N

Abstract:
1. A method of measuring capability of a user to adjust image quality using a device for measurement of the capability, the method comprising: inputting, into the device, information about an instructor image serving as a target for image qualities of an evaluation image to be corrected for measurement; inputting, into the device, information about a correlation function obtained by a plurality of other users generating first corrected images by adjusting the image qualities of the evaluation image, calculating, by subjective evaluation of image qualities of the first corrected images, image quality adjustment capability values that represent capability of the other users to adjust the image qualities of the evaluation image, calculating differences in image quality characteristic between the first corrected images and the instructor image, and obtaining the correlation function between the image quality characteristic differences and the image quality adjustment capability values; inputting, into the device, information about a second corrected image obtained by a user correcting the image qualities of the evaluation image; calculating an image quality characteristic difference between the second corrected image and the instructor image; and calculating an image quality adjustment capability value of the user based on the correlation function and the image quality characteristic difference, wherein the image quality adjustment capability value is an interval scale based on Thurstone's law of comparative judgment or a cumulative probability which is the result of summing up the percentages of victories in paired comparison, and the image quality characteristic difference between the first or second corrected image and the instructor image is one selected from a group comprising: an average of differences in RGB Euclidean distance; an average of differences in lightness (L value of CIELAB); an average of differences in brightness (Y out of tristimulus values XYZ); an average of color differences (Eab); an average of differences in saturation; a difference information of histograms related to such color information as contrast ratio, saturation, lightness, brightness, or hues; and a difference in amount of edges.