STV3550B STMicroelectronics, STV3550B Datasheet - Page 32

• Manufacturer Part Number: STV3550B
• Manufacturer: STMicroelectronics

Specifications of STV3550B

• Operating Temperature (min): 0C
• Operating Temperature (max): 70C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / Rohs Status: Compliant

Video function description
32/145
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:
●
●
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
When range = 0, the inflection point is based on the value the average brightness
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
STV3550