Local color transfer method for digital photo

Abstract

The invention discloses a local color transfer method for a digital photo, which comprises the following steps that: 1) a user interactively selects a local editing area in a source image and a target image respectively; 2) color distribution of pixels in the source image and the target image is calculated, and is transformed into ellipsoidal distribution in an RGB color space; 3) according to the color distribution of the pixels in the source image, the ellipsoidal distribution corresponding to the target image is adjusted to ensure that an ellipsoid corresponding to the target image and an ellipsoid corresponding to the source image have the same central point, axial length and orientation; 4) a CMM corresponding to the target image is evaluated; and 5) the color mixing operation is performed on an intermediate image and the target image according to a weight in the CMM so as to obtain a final transfer result image. The user only needs to simply and interactively select a local area to be edited and a reference local area by a rectangle, a system can quickly finish the local color transfer, so that the processing efficiency is greatly improved. The method can provide a convenient and quick image color editing tool for image editors and the like.

Description

technical field [0001] The invention relates to an image data processing method, in particular to a local color migration method of a digital photo. Background technique [0002] With the continuous popularization of digital cameras in people's lives, digital photo editing has gradually become a research hotspot in image processing and computer graphics. Among them, color transfer refers to adjusting a target image according to the tone distribution of a source image so that it has a similar appearance to the source image. This technology can adjust a daytime photo to dusk, can adjust a winter photo to summer, can make another blurry photo clear based on a clear photo, etc., in digital image processing, It has important application value in many fields such as film and television special effects and computer art. [0003] However, existing color transfer techniques focus on global color transfer (Document 1: REINHARD, E., ASHIKHMIN, M., GOOCH, B., AND SHIRLEY, P.2001. Colo...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems existing in the prior art, the present invention provides a local color migration method of digital photos, which solves the problem that the calculation of local color migration of digital photos in the prior art is complicated, the efficiency is not high, and the generated images are not accurate, which is not conducive to Technical issues with user interaction

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