GONG, FINLAYSON, FISHER: RECODING COLOR TRANSFER AS A COLOR HOMOGRAPHY1 Recoding Color Transfer as a Color Homography
نویسندگان
چکیده
Color transfer is an image editing process that adjusts the colors of a picture to match a target picture’s color theme. A natural color transfer not only matches the color styles but also prevents after-transfer artifacts due to image compression, noise, and gradient smoothness change. The recently discovered color homography theorem proves that colors across a change in photometric viewing condition are related by a homography. In this paper, we propose a color-homography-based color transfer decomposition which encodes color transfer as a combination of chromaticity shift and shading adjustment. A powerful form of shading adjustment is shown to be a global shading curve by which the same shading homography can be applied elsewhere. Our experiments show that the proposed color transfer decomposition provides a very close approximation to many popular color transfer methods. The advantage of our approach is that the learned color transfer can be applied to many other images (e.g. other frames in a video), instead of a frame-toframe basis. We demonstrate two applications for color transfer enhancement and video color grading re-application. This simple model of color transfer is also important for future color transfer algorithm design.
منابع مشابه
Recoding Color Transfer as A Color Homography
The recently discovered color homography theorem proves that colors across a change in photometric viewing condition are related by a homography [2]. In this paper, we propose a color-homography-based color transfer decomposition which encodes color transfer as a combination of chromaticity shift and shading adjustment. Our experiments show that the proposed color transfer decomposition provide...
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In this supplementary material, we show the details of solving shading with a Laplacian smoothness constraint, the complete color transfer approximation evaluation table, and its corresponding color transfer approximation visual results. Please also check our supplementary video for video color grading extraction demonstrations. 1 Laplacian shading regularization In this section, we describe ho...
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