Image processing device, image processing method, and computer program

摘要

Provided are an image processing device, image processing method, and computer program which can accurately detect noise in an input image and eliminate or reduce the noise. A display device extracts a specific area including a target pixel from an input image and determines whether the boundary of noise is included in the specific area. If so determined, the display device performs filtering using a smoothing filter to smooth the target pixel. If not so determined, the display device performs filtering using an edge-preserving smoothing filter to smooth the target pixel. At this time, the display device determines whether to apply the result of the smoothing process using the edge-preserving smoothing filter, on the basis of the pixel values in the specific area, the result of the smoothing process using the edge-preserving smoothing filter, and the like.

主权项

1. An image processing device for eliminating or reducing noise from an input image comprising a plurality of pixels arranged in a matrix to generate an output image, the image processing device comprising:
specific area extraction means configured to extract a specific area comprising a target pixel from the input image; smoothing determination means configured to determine whether to perform a first smoothing process on the target pixel, on the basis of the specific area extracted by the specific area extraction means; first smoothing means configured to, if the smoothing determination means determines that the first smoothing process is to be performed on the target pixel, perform the first smoothing process using a smoothing filter to smooth a value of the target pixel; and second smoothing means configured to, if the smoothing determination means determines that the first smoothing process is not to be performed on the target pixel, perform a second smoothing process using an edge-preserving smoothing filter to smooth the value of the target pixel, wherein the image processing device generates an output image by replacing a value of each pixel in the input image with either a pixel value smoothed by the first smoothing means or a pixel value smoothed by the second smoothing means.