STV3550 datasheet(31/144 Pages) STMICROELECTRONICS

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STV3550 データシート(PDF) 31 Page - STMicroelectronics

部品番号	STV3550

部品情報	LCD and Matrix Display TV Processor

PDF	144 Pages

Scroll/Zoom	100%

メーカー	STMICROELECTRONICS [STMicroelectronics]

ホームページ	http://www.st.com

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STV3550

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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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