Method of processing a relative illumination phenomenon on a digital image and associated processing system
A digital image, relative illumination technology, applied in image data processing, image enhancement, image communication and other directions, can solve problems such as the impact of photo quality
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[0063] To deal with any relative illumination phenomenon, the method according to the invention proposes two basic steps, various embodiments of which are described below.
[0064] The first step of the method according to the invention consists in determining the illuminants present during the capture of the scene visible on the digital image to be processed.
[0065] In a first example of implementing this step, a white balance estimation algorithm will be used.
[0066] In fact, a given light source corresponds to a spectral distribution according to wavelength. This means that certain wavelengths (thus more or less certain colors of visible objects) are represented, for example, between 400 nm and 800 nm, under certain light sources. For example, in tungsten illumination, for low color temperatures, radiometric quantities for wavelengths corresponding to blue in the field of view of visible objects are barely represented compared to measurements related to red wavelengths...
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