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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
92 Image Processing for Cinema
color correction methods that also enhance the contrast without introducing
artifacts such as halos or spurious colors.
Basic edge enhancement is linear: an edge map E is computed from the
image I, scaled and added back to I to obtain the sharpened image I
0
[68]:
I
0
= I + kE. (3.30)
A common way to compute the edge map is through an “unsharp mask”:
the image I is blurred by convolution with a Gaussian g, then subtracted from
the original I to obtain E [68]:
E = I g I. (3.31)
FIGURE 3.26: Linear edge enhancement (unsharp masking). Top left: edge.
Top right: aftter Gaussian blur. Bottom left: edge map. Bottom right: sharp- ...
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Publisher Resources

ISBN: 9781439899274