Mitsubishi Electric KD Series, User Manual

Page: 78 / 118

© Mitsubishi Electric Corporation
The following procedures shows how to generate Dark correction
data.
1) Normal Trigger mode: DarkCorrectionExecute
Dark correction generation sequence is started up by executing
“DarkCorrection Execute”. The Dark correction data (average of 32
lines of pixel data) is save on this product.
This product has memory for saving correction data every
resolution. Correction data is saved in memory for current
resolution by this operation. If using multiple resolution, execute
this operation in each resolution. The correction data which is
applied for CIS is automatically changed when resolution is
changed.
[Remark]
1) At factory setting, CIS has an initial dark correction data for only
600dpi . After turning on power, the initial dark correction data
are booted automatically and dark correction function becomes
available.
2) Sensor black output is Fluctuated by temperature, reading
cycle, electronic shutter exposure period. Please regeneration
the black correction data at appropriate intervals.
3) If black correction is not performed correctly, streaky variations
may appear in the image.
4) Turn off illumination when executing dark correction.
5-2-13 Dark correction
[Function]
Corrects the variation of the dark outputs pixel by pixel
(Dark output: Output based on illumination (LED) OFF)
For more detail, refer Chapter 2-3.
78
Address Register name R/W Parameter
Data
Function Initial
7050h DarkCorrectionEnable R/W 0 or 1
Dark correction On/Off setting
0:OFF /1:ON
0
7054h DarkCorrectionExecute R/W 1 Automatic generate Dark Correction Data -
DVp’(n) = DVp(n) –Dvd0(n)
Image data turned off
illumination (LED) after Dark correction
Image data turned off
illumination (LED) after Dark correction
Pixel
C
IS
o
u
tp
u
t
Image data with
illumination (LED) turned off
Image data with
illumination (LED) turned off
DVd0(n): “n” th pixel
Black output
C
IS
o
u
tp
u
t
Pixel
※
When operating Dark/White correction, input external sync. signal continuously, or conduct with internal sync. mode.
5-2 Setting
⑪
: Dark Correction
TM-XJ959A