IMAGE PROCESSING DEVICE, IMAGE PROCESSING METHOD, IMAGE CAPTURING DEVICE, COMPUTER PROGRAM, AND RECORDING MEDIUM

摘要

An image processing device (21) is provided with: a noise suppression processor (23) for creating a noise-reduced image (NRs) by executing spatial filtering on a plurality of pixels, which fall within a reference range that includes a pixel of interest, in an input image (Is); and a distortion correction processor (24) for correcting distortion by local stretching or shrinking by a magnification factor (R) corresponding to the local amount of distortion in the noise-reduced image (NRs). The reference range is dynamically changed in accordance with the magnification factor (R). Control is performed so that the reference range becomes narrower as the magnification factor (R) increases.

主权项

1. An image processing device comprising:
a noise suppression unit that executes spatial filtering on a plurality of pixels in a reference range including a pixel of interest in an input image, thereby generating a noise-reduced image; a distortion correction processor that locally deforms the noise-reduced image with a magnification factor responsive to a local amount of distortion in the noise-reduced image, thereby correcting distortion of the noise-reduced image; and a filtering control unit that dynamically changes the size of the reference range responsive to the magnification factor; wherein the filtering control unit narrows the reference range as the magnification factor increases in a circumferential direction extending from an image center of the input image, the circumferential direction being a direction of application of the magnification factor.