Image processing device, image processing method, photographic imaging apparatus, and recording device recording image processing program

摘要

An image processing device includes: a motion-vector computation unit that computes a motion vector between a base image and a reference image; a motion compensation unit that performs a motion compensation to align the reference image with the base image based on the motion vector; a contrast computation unit that computes a contrast value of a target pixel of the base image based on one of the base image and the reference image; a synthetic ratio computation unit that computes a synthetic ratio between: the target pixel for a synthesis processing in the base image; and a corresponding pixel corresponding to the target pixel in the reference image processed by the motion compensation, in response to the contrast value of the target pixel; and a synthesizing unit that synthesizes the target pixel of the base image and the corresponding pixel of the reference image based on the synthetic ratio.

主权项

1. An image processing device for performing synthesis processing with a base image and at least one reference image to generate a synthetic image with a smaller amount of noise than the base image, the image processing device comprising:
a motion-vector computation unit that computes a motion vector between the base image and the reference image; a motion compensation unit that performs a motion compensation to align the reference image with the base image based on the motion vector; a contrast computation unit that computes a contrast value of a target pixel for the synthesis processing in the base image based on one of the base image and the reference image; a synthetic ratio computation unit that computes a synthetic ratio between the target pixel of the base image and a corresponding pixel corresponding to the target pixel in the reference image processed by the motion compensation, in response to the contrast value computed by the contrast computation unit of the target pixel; and a synthesizing unit that synthesizes the target pixel of the base image and the corresponding pixel of the reference image based on the synthetic ratio; wherein the contrast computation unit, within an area including the target pixel, computes a maximum value of a difference between an average value of one of luminance and brightness within the area, and one of luminance and brightness of each pixel, as the contrast value of the target pixel.