Image processing method, image processing apparatus, and image processing program

摘要

The present invention is an image processing device which has tone mapping curve generation means for local tone correction, which generates a tone mapping curve for local tone correction using the luminance of peripheral areas for each pixel of interest within an input image; prediction means which predicts the overall luminance and/or the contrast of the image after the local tone correction on the basis of the average luminance of partial areas into which the input image has been partitioned; tone mapping curve generation means for global tone correction, which generates a tone mapping curve for global tone correction on the basis of the prediction; and correction means which integrates the tone mapping curve for local tone correction and the tone mapping curve for global tone correction so as to simultaneously execute the local tone correction and the global tone correction.

主权项

1. An image processing method comprising:
generating a tone mapping curve for local tone correction by a luminance of a surrounding region of each pixel of interest in an input image; predicting at least one of an overall luminance and contrast of an image after said local tone correction from an average luminance of a partial region defined by dividing said input image; generating a tone mapping curve for global tone correction based on said prediction; and integrating the tone mapping curve for said local tone correction and the tone mapping curve for said global tone correction, and executing said local tone correction and said global tone correction at the same time.