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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
High dynamic range video and tone mapping 219
pixel (i, j) by requiring their perceptual distance (in the sense of Shen) with
L(i, j) to be equal, i.e.
L
+
(i, j) L(i, j)
L(i, j)
=
L(i, j) L
(i, j)
L(i, j)
= k
for some k > 0.
11.4.1.5 Expression of the discrete gradient
Given a constant λ ]0, 1[, we construct for each pixel (i, j) two images
L
+
(i, j) and L
(i, j) defined as follows
L
+
(i, j) : (m, n) 7−→ L(m, n)
1 + min(1/L(i, j) 1, λ) δ((m, n) (i, j))
L
(i, j) : (m, n) 7−→ L(m, n)
1 min(1/L(i, j) 1, λ) δ((m, n) (i, j))
where δ is the Dirac delta function.
Remark 3. By the use of the increment k = min(1/L(i, j) 1, λ), we impose
that the values ...
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Publisher Resources

ISBN: 9781439899274