Mitsubishi Electric KD Series User Manual page 73

5-2 Setting ⑪ γ correction
5-2-11 γ correction function
【 Input 】
Command Parameter （ DATA ） （ DATA ） CR
ＧＣ ** Upper Lower
【 Output 】
Result Parameter （ DATA ） （ DATA ） CR
** ** Upper Lower CR
* a gain is defined by 2 byte data . Commands except for setting a gain have
no data.
[initial]
γ correction : OFF ( γ ＝１ )
Preset γ table : γ=2.2
[setting]
γ correction ON/OFF
出力
変換後データ
Example
0 LSB
Switch γ correction turn on
GC 00 <CR> ⇒ 00 00 <CR>
TM-XG537C
CR
γテーブル
ガンマテ ーブル閾値
GMSH_01 GMSH_02 GMSH_03
1024
領域 1 領域 2
領域 0
76 8
領域 3
51 2
25 6
25 6 51 2 76 8 10 24
入力
領域 0 領域 1 領域 2 領域 3
0 ～ 12 8 階調 129 ～ 34 6 階調 347 ～ 640 階調 641 ～ 1023 階調
9 0 0 1 1
8 0 1 0 1
7
6
5
4
8bit-SRAM 8bit-SRAM 8bit-SRAM 8bit-SRAM
FFh~00h FFh~00h FFh~00h FFh~00h
3
2
1
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【 γ correction function 】
[Function]
Change the linearity from input data to output data by LUT .
* LUT : Look Up Table
The output property of Photo-diodes on sensor ICs against
light power input is linear.
This function change the of Input-Output property (γ) to fit
visible images .
【 Remarks 】
1) γ table consists of 4 of LUT which made output
correspond to 256 of input which shared 1024 steps
with 4 groups.
2) Refer the function specification about details of γ
correction function .
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