By Artusi, Alessandro; Aydın, Tunç Ozan; Banterle, Francesco; Panozzo, Daniele; Sorkine-Hornung, Olga
ISBN-10: 1315355337
ISBN-13: 9781315355337
ISBN-10: 148224991X
ISBN-13: 9781482249910
Read Online or Download Image Content Retargeting: Maintaining Color, Tone, and Spatial Consistency PDF
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Extra resources for Image Content Retargeting: Maintaining Color, Tone, and Spatial Consistency
Sample text
Chapter 3 tackles the problem of converting a color image into a gray-scale image. After a brief introduction on typical dimensionality reduction problems, we review in detail the color2gray problem and existing approaches to solving it. Finally, the opposite problem, colorization, is introduced. It can be seen as part of the general problem of color mapping, but we prefer to clearly separate the color transfer from the colorization methods and present it as part of the style transfer problem in Chapter 4.
LCD in displays, sensors and primaries of the color filter array in digital cameras. 2. A typical colorimetric characterization process for an SDR imaging system. Starting from a device-dependent color space, a mapping to a device-independent color space and vice versa is defined. Having different color spaces that depends from the technological characteristics of the device is a practical problem in an imaging system. Colors specified in a vendor-specific color space, also called a device-dependent color space, may be appear different when represented with the same color coordinates on a different device.
The question is, therefore, how do we preprocess images to maximize the display quality on the particular device? Another classical problem is the need to transfer a specific set of colors, as well as the style, from one image to another one. The research problems and applications above can be classified as retargeting problems. Retargeting is far from being an easy task. In many cases, it is even an ill-posed problem, such as when displaying standard dynamic range (SDR) images, typically 8 bits per color channel, on high dynamic range (HDR) displays.