Patent ID: 7630547

Claim:
An image quality display apparatus comprising: an input unit that inputs a first image and a second image which is to be selected subsequent to the first image, in a JPEG format; an operating unit that accepts a display request for displaying a graph showing a frequency distribution of shading levels of the second image; a display unit that displays the graph in response to the display request; and a tallying unit that prepares data for displaying the graph based on DC components extracted when the second image in the JPEG format is expanded, wherein: the tallying unit prepares the data of the second image when the first image is selected, an average value of gray scale levels of an image picked up under a proper exposure condition is set, the graph includes a section that corresponds to the average value and that is positioned at a center of a horizontal axis of the graph, the graph includes a line passing through a center of the section and being parallel with a longitudinal axis of the graph, and a value corresponding to the center of the section is 0.