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4.3.2
Line Skipping
If available, Line skipping feature allows to transfer only even lines and thus to increase frame transfer speed
while keeping the same field of view.
When using dual ROI mode, you can enable line skipping only in one ROI or in both ROIs.
To enable line skipping:
-
Stop acquisition
-
Set frame / ROI parameters
-
Enable line skipping
-
Height is automatically computed (divided by 2 in single ROI or when activated in both ROIs)
-
Check entry
ImageHeightValid
to be sure you set valid parameters
Line skipping is controlled by XML entries:
•
LineSkipping
•
ImageHeightValid
4.3.3
Defect Pixel Correction
Principle
A defect pixel correction can be applied to correct some pixel values using its neighbors. 8 pixels per line can
be corrected.
At camera power up, defect pixel correction stored in camera flash memory is loaded and use in real time.
By default, a defect pixel correction is written in camera flash during camera production and used at power up.
This is the “
Factory
” correction.
User can use this Factory correction or program its own correction by indicating dynamically which pixels must
be corrected in XML interface. This is the “
User
” correction. Then, this User configuration can be saved in flash
and used at next power up. User modifications are not automatically saved and will be lost at next power cycle
if they are not saved.
User correction has boot priority over Factory correction. If user has saved a correction in flash, it will be used
until User correction is erased from flash. Then Factory correction will be used again.
Control
DefectPixelCorrectionEnable
enables “On” or disables “Off” defect pixel correction.
DefectPixelSource
indicates the source of correction (User or Factory).
DefectPixelTotal
indicates how many pixels are corrected. (Maximum number is total number of lines x 8).
DefectPixelTestMode
enables “On” or disables “Off” a defect pixel test mode. This test mode purpose is to ease
corrected pixel visualization. When enabled, all corrected pixels are shown in white and non-corrected pixels
are shown in black. When disabled, sensor pixels are used, corrected or not, depending on
DefectPixelCorrectionEnable
value.
DefectPixelLineSelect
selects a line (i.e. Y pixel coordinate) and
DefectPixelX0..X7
are the 8 pixel columns (i.e. X
pixel coordinates) which can be corrected. If 65535 (0xFFFF) is set as coordinate, no pixel is corrected. To
