Image Content Retargeting: Maintaining Color, Tone, and by Artusi, Alessandro; Aydın, Tunç Ozan; Banterle, Francesco;

By Artusi, Alessandro; Aydın, Tunç Ozan; Banterle, Francesco; Panozzo, Daniele; Sorkine-Hornung, Olga

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Between these two levels of illumination, the noise floor and the saturation, we have the dynamic range that the camera is able to acquire. To have a large dynamic range, we need to quickly cross the noise floor and reach the point of saturation at the highest possible level of illumination [264]. To reproduce a color response that fulfills the trichromatic model introduced in Chapter 1, RGB color filters are placed in front of the CCD sensors. 4. A typical CCD linear sensor response of a DSLR camera.

The radius of the eye is of about 12 mm; its movements in its bony orbit are due to the use of three types of muscles. The eye consists of several components such as:cornea, pupil, lens, aqueous humor, vitreous body, and retina. We will introduce the fundamental ones. 1. Human eye structure. The external stimulus light, when striking the eye, encounters the first eye layer, the cornea. This has a complex lamellar structure and it is transparent without blood vessels. The hole in the iris diaphragm is where the pupil is located, and where light passes through.

XYZ. To faithfully represent the digital camera color in the display system, the XYZ color space is converted to the device-dependent color space of the display RGBd. Finally, the nonlinearity behavior of the display device and the gamut mismatches between the color gamuts of the two devices are taken into account. Exhaustive models, such as look-up tables (LUT), are used to define the colorimetric characterization mapping function via multidimensional interpolation. The main advantage of these approaches is that they do not require prior knowledge of how devices in the system work [14].

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