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STV3550 Scheda tecnica(PDF) 31 Page - STMicroelectronics

Il numero della parte STV3550
Spiegazioni elettronici  LCD and Matrix Display TV Processor
PDF  144 Pages
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Produttore elettronici  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STV3550 Scheda tecnica(HTML) 31 Page - STMicroelectronics

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3.3.6.2 White Stretch
The White Stretch algorithm is used on a dark sequence in order to increase the contrast on the
entire image. By default, the inflexion point is based on the average brightness, but another value
can be set by user. Two modes are available by setting the range parameter:
1. When Range = 0, the inflection point is based on the value the average brightness.
2. When Range = 1, 2 or 3, the inflexion point IS NOT BASED on the value of the average
brightness, but is used as parameter for an extended set of possibilities.
The following figures shows various examples of the white stretch algorithm with the following
values: Gain = 7, Range = 0 and an Average Brightness of 64.
Figure 19: White Stretch 1



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