Mitsubishi Electric KD Series User Manual page 69

5-2 Setting ⑦ Dark correction
※ When conducting Dark/White correction, input external sync. signal continuously, or conduct with internal sync. mode.
5-2-7 Dark Correction
【 Input 】
Command Parameter End code
DC ** CR
[Initial setting] Dark Correction : OFF
[Setting]
1) Automated Dark correction data generation
2) Dark Correction ON/OFF
Image data with LED turned off Image data with LED turned off
DVd0(n): "n" th pixel
Black output
Pixel
DVp'(n) = DVp(n) –Dvd0(n)
Image data turned off LED after Dark correction Image data turned off LED after Dark correction
Pixel
Example
Switch Dark correction mode to turn on :
DC 01 <CR>
⇒
TM-XG537C
【 Output 】
Result Parameter End code
** ** CR
00 01 <CR>
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【 Dark Correction 】
[Function]
Correct the variation of dark outputs pixel by pixel when
illumination is turned off .
Refer chapter 2-3. about the details of this function.
【 Remarks 】
1) CIS has initial dark correction data in Factory setting
memory . After turning on power , initial dark correction
data are booted in ASIC and FPGA registers
automatically and dark correction will be start by the
command .
2) Periodic Re-generation of dark correction data is
recommended caused by Values of Black output
change by Temperature and Line period etc.
3) Scanning Image has some unusual strips by using
incorrect dark correction data .
4) White correction has to be turned on under the
condition that dark correction is turned on .
5) Refer the function specification about how to generate
new dark correction data .
6) Generate data for each scan when conducting
Dark/White correction.
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