Image compositing device and image compositing method

摘要

It is an object to generate a desired composite image in which a motion area of a subject is correctly composited.;A difference image between a base target and an aligned swap target is generated (S1021), and an extracted contour in the difference image is determined according to the active contour model (S1022). The inner area of the contour and the outer area of the contour are painted with different colors to be color-coded so as to generate a mask image for alpha blending (S1023). Using the mask image thus generated, the swap target that is aligned with respect to the base target is composited with the base target of the base image by alpha blending (S1024).

主权项

1. An image compositing device, comprising:
a motion area detecting section to detect a motion area of a subject based on a base image and at least one comparative image that are photographed at different times; a compositing area setting section to set a compositing area in the comparative image based on the detected motion area; and a composite image generating section to composite the set compositing area with the base image so as to generate a composite image, wherein the motion area detecting section extracts a contour by setting an closed curve in an initial state so that the closed curve encloses a predetermined subject area in a difference image between the base image and the comparative image, and shifting nodes that define the closed curve in a direction in which an energy function of the closed curve is optimized; and wherein the compositing area setting section sets the compositing area based on the contour extracted in the difference image, wherein the image compositing device further comprises: a boundary setting section to set a boundary between the plurality of subject area, wherein the motion area detecting section sets the closed curve in the initial state so that the closed curve does not have an intersection with the boundary.