VC Camera Link series
Page 52 of 86
RA14-11A-010
8.10 High Dynamic Range (VC-2MC-M340/VC-4MC-180 Only)
When you acquire images in some situations where a bright light source or shiny materials are located within the
field of view, the light areas appear overexposed in the acquired images. And if you use a short exposure time to
avoid overexposure in the light areas of the acquired images, all details will be lost in the darker areas.
The Multiple Slop capability is implemented on the VC-2MC-M340 and VC-4MC-M180 cameras to acquire high
dynamic range (HDR) images which have higher variations between the brightest and darkest portions of the
images. As shown in the figure below, when the bright pixel reaches a certain output level, it will be maintained at
the level for a programmable time from overall exposure time. This happens two times to make sure that the
pixel is not saturated at the end of exposure time.
Figure 8.17 High Dynamic Range Concept Drawing
To use the High Dynamic Range feature, you must set the Trigger Mode to Free-Run. Use the
“shm” command
to activate the HDR feature and use
“shd n” command to set the dynamic range in
㏈
. The available setting
range is 0 to 40
㏈
.
Summary of Contents for vieworks LVC-25MC2-30
Page 1: ......
