Image processing apparatus, image processing method, and program to combine a composite image of noise suppressed images generated from images each including a direct current component and at least one noise suppresed image processed from at least one image not including the direct current component

摘要

The present invention provides an image processing apparatus that increases an effect of noise suppression processing and allows a visually excellent image to be obtained. This image processing apparatus divides an input image into bands to generate a high frequency image that does not include a direct current component. The image processing apparatus further generates reduced images each including the direct current component and having a different resolution from an image including the direct current component, and performs noise suppression processing on the high frequency image and the reduced images. The image processing apparatus then repeats enlargement and combining of the reduced images and adds a composite image and the high frequency image to finally obtain an output image.

主权项

1. An image processing apparatus, comprising:
a first image generating unit configured to divide an input image into bands to generate a first image that includes a direct current component and at least one second image that does not include the direct current component and includes a higher frequency component than a frequency component included in the first image; a second image generating unit configured to generate a plurality of third images from the first image, the third images each including the direct current component and having a different resolution; a noise suppressing unit configured to perform noise suppression processing on the at least one second image and the third images; a first combining unit configured to combine the plurality of third images generated by the second image generating unit and subjected to the noise suppression processing; and a second combining unit configured to combine a composite image from the first combining unit and the at least one second image that has been subjected to the noise suppression processing.