Mitsubishi Electric KD Series, Руководство пользователя

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5-2-15 PGA
[Funcion]
Amplify image signals for whole pixels in a line by the
designated magnification . Adjustable from 0 to 4.0 times
for each color.
This amplification is performed by digital calculation.
Thereby, Signal level increases by PGA function, but noise
level also increases same as signal amplification.
[Remark]
1) When you apply PGA with each color’s output, be
careful about White balance of color scanning.
2) The register value at “DegitalGain_R,G,B” is defined to
be a “Signed integer”. When you set the register values
based on hex number, make sure the sign of “Positive
(+) “ or “Negative (-)” of the register value.
A setting example: Register parameter data
= -2
（
decimal digit
）
= FFFFFFFEh(hex digit)
80
Address Register name R/W Parameter
Data
Function Initial
70A0h DegitalGainEnable R/W 0 or 1
Set PGA
On/Off
0:OFF /1:ON
0
70A4h DegitalGain_R R/W -1024 to 3071
Set a value of Red PGA (0 to 4.0)
0
70A8h DegitalGain_G R/W -1024 to 3071 Set a value of Green PGA (0 to 4.0) 0
70ACh DegitalGain_B R/W -1024 to 3071 Set a value of Blue PGA (0 to 4.0) 0
Output data
＝
Input data
×
1024 + Register value
1024
amplification
pixel
C
IS
o
u
tp
u
t
Amplify signal output for whole pixels Amplify signal output for whole pixels
5-2 Setting
⑬
: PGA
TM-XJ959A