mt9v125 aptina, mt9v125 Datasheet - Page 14

• Manufacturer Part Number: mt9v125
• Description: 1/4-inch System-on-a-chip Soc Vga Ntsc And Pal Cmos Digital Image Sensor
• Manufacturer: aptina

Automatic Flicker Abatement
Gamma Correction
NTSC/PAL Encoder
PDF: 09005aef829db8a0/Source: 09005aef829dbfdb
MT9V125_LDS_2.fm - Rev. A 4/07 EN
Flicker occurs when integration time is not an integer multiple of the period of the light
intensity. The automatic flicker abatement block eliminates flicker by limiting exposure
times to integer multiples of the light period.
To achieve more life-like quality in an image, the IFP includes gamma correction and
color saturation control. Gamma correction operates on the luminance component of
the image and enables compensation for non-linear dependence of the display device
output versus the driving signal (e.g., monitor brightness versus CRT voltage).
In addition, gamma correction provides range compression, converting 10-bit lumi-
nance input to 8-bit output. Pre-gamma image processing generates 10-bit luminance
values ranging from 0 to 896. Piece-wise linear gamma correction utilized in this imager
has ten linear intervals, with end points corresponding to the following input values:
Xi = 0…10 = {0, 16, 32, 64, 128, 256, 384, 512, 640, 768, 896}.
For each input value Xi, the user can program the corresponding output value Yi. Yi val-
ues must be monotonically increasing.
The MT9V125 has an on-chip video encoder to format the data stream for composite
video output in the supported NTSC or PAL formats. The encoder expects CCIR-656
interlaced NTSC or PAL data stream input. By default, the input is taken from the on-
chip image stream. Input can also be taken from the external DIN port for external
image processing used with the on-chip video encoder and composite output.
MT9V125: 1/4-Inch VGA SOC Digital Image Sensor
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Detailed Architecture Overview
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