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Image Processing for Cinema
book

Image Processing for Cinema

by Marcelo Bertalmío
February 2014
Intermediate to advanced content levelIntermediate to advanced
321 pages
10h 26m
English
Chapman and Hall/CRC
Content preview from Image Processing for Cinema
106 Image Processing for Cinema
[0, 255] to [127, 128]. This operation reduces the dynamic range in the sub-
sequent processing.
4.3.1 Discrete cosine transform
Next, the DCT (Discrete Cosine Transform) is applied to the block. The
DCT is, like the discrete Fourier transform, a linear transform that expresses
a signal as a linear combination of basis functions.
FIGURE 4.2: JPEG’s DCT basis functions. Figure from [16].
A very basic property of all linear transforms is that both the signal and
its transform have the same number of samples. For example, the DCT of an
8 × 8 block will consist of 64 transform coefficients, each being the sum of
the pixel-by-pixel ...
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Publisher Resources

ISBN: 9781439899274