OPERATING AND USER MANUAL OPAL FAMILY
49
IMAGE AND DATA FORMATTING
Frame rate consequences when vertical binning is used
8.2.2.
If the vertical binning is used, the maximum possible frame rate will be higher than the standard frame
rate. The camera will however not automatically increase frame rate when binning is enabled.
If the vertical binning is disabled or is switched to a lower binning factor, then the maximum possible
frame rate decreases. If the camera is running in control mode, make sure to check if the external
trigger signal complies with the new maximum frame rate.
If the camera is running in continuous mode, the frame rate is automatically decreased if necessary
when vertical binning is disabled or switched to a lower binning factor.
When a higher binning factor is selected, the frame rate is not automatically increased! The maximum
frame rate depends on the vertical resolution which is different for camera model, according to the
table below.
CAMERA
MODEL
NO BINNING
2X VBINNING
4 X VBINNING*
8X VBINNING*
OUTPUT
FRAME
H*V
OUTPUT
FRAME
H*V
OUTPUT
FRAME
H*V
FRAME
RATE
OUTPUT
FRAME
H*V
OPAL-1000m
123
fps
1024x1024
215
fps
1024x512
346
fps
1024x256
492 fps
1024x128
OPAL-1600m
69 fps
1600x1200
127
fps
1600x600
216
fps
1600x300
333 fps
1600x150
OPAL-2000m
65 fps
1920x1080
121
fps
1920x540
210
fps
1920x270
330 fps 1920x135
OPAL-4000m
33 fps
2336x1752
59 fps
2336x876
97 fps
2336x438
142 fps
2336x219
OPAL-8000m
17 fps
3296x2472
32 fps
3296x1236
55 fps
3296x618
85 fps
3296x309
* optional
Relation between vertical binning and maximum framerate.
Table 8.2:
Image quality considerations when binning is used
8.2.3.
The electronics in the camera are optimized in order to detract as little as possible from any image
artifact or image quality degradation when vertical binning is used. There are some principle
drawbacks due to CCD properties.
The best way to illustrate this is to regard the binned CCD as a sensor with image pixels doubled in
size in the vertical direction. The sensitivity of the camera will increase, due to the larger pixel. The
capacity of the photo-pixel is also doubled. The capacity of the transfer register remains the same,
but is large enough to transport the charge of two pixels. When binning more than two pixels (optional
feature to the standard camera), transport capacity is not enough for the full load of saturated pixels.
This may lead to excessive blooming when using binning, although the image was distortion-free in
non-binning mode.
Also note that noise level will approximately remain the same. Because sensitivity, increases the
signal-to-noise ratio seems to increase. But bear in mind that the signal will saturate at half the level
that the camera would saturate in a non-binning format.
The output image resolution will decrease by the applied factor of binning.
Summarized: the dynamic range of the camera in binning format is approximately the same as in
non-binning format. In fact the dynamic range is a little bit smaller, because noise does increase a
small amount.
Summary of Contents for Camera Link OPAL Series
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