This is useful if you want to increase the frame rate of your camera.
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Whenever the camera is able to complete the entire image acquisition process (exposure + readout) before the next image acquisition starts, images will not overlap.
On cameras configured for Global shutter mode, non-overlapping image acquisition looks like this (using Trigger Width exposure mode as an example):
On cameras configured for Rolling shutter mode, non-overlapping image acquisition looks like this (using Timed exposure mode as an example):
With overlapping image acquisition, the camera exposes a new image while still reading out the sensor data of the previous image.
This is useful if you want to increase the frame rate of your camera.
On cameras configured for Global shutter mode, overlapping image acquisition looks like this (using Trigger Width exposure mode as an example):
On cameras configured for Rolling shutter mode, overlapping image acquisition looks like this (using Timed exposure mode as an example):
On most camera models, there is no camera parameter that allows you to turn overlapping image acquisition on or off. Instead, the way that you operate the camera determines whether image acquisitions are overlapped.
Image acquisitions are overlapped if the following condition applies:
Frame Period ≤ Exposure Time + Sensor Readout Time
If the camera is configured for free run image acquisition, overlapping image acquisitions occur automatically.
If the camera is configured for triggered image acquisition, overlapping image acquisitions occur whenever you trigger the camera at a sufficiently high rate.
On some camera models, you can manually enable or disable overlapping image acquisition. To do so, set the OverlapMode parameter to one of the following values:
Basler recommends setting the OverlapMode parameter to Off whenever the acquisition mode is set to Continuous and you are acquiring less than 10 frames per second.
If you have configured the Global shutter mode and the Trigger Width exposure mode on the camera and you want to use overlapping image acquisition, the following guideline applies:
You must not stop the exposure of the current frame until readout of the previously acquired frame is complete.
If you violate this guideline, the camera drops the current frame and declares a Frame Start Overtrigger event.
You can avoid violating this guideline by monitoring the camera’s Frame Trigger Wait signal and by specifying an appropriate value for the Exposure Overlap Time Max parameter.
Camera Model | Overlapping Image Acquisition Availability | Enabling Overlapping Image Acquisition |
---|---|---|
a2A1920-51gmBAS | tbd | tbd |
a2A1920-51gcBAS | tbd | tbd |
a2A1920-160umBAS | tbd | tbd |
a2A1920-160ucBAS | tbd | tbd |
acA640-90gm | Always (free run and triggered image acquisition) | Automatic |
acA640-90gc | Always (free run and triggered image acquisition) | Automatic |
acA640-120gm | Always (free run and triggered image acquisition) | Automatic |
acA640-120gc | Always (free run and triggered image acquisition) | Automatic |
acA640-121gm | Always (free run and triggered image acquisition) | Automatic |
acA640-300gm | Always (free run and triggered image acquisition) | Automatic |
acA640-300gc | Always (free run and triggered image acquisition) | Automatic |
acA720-290gm | Always (free run and triggered image acquisition) | Automatic |
acA720-290gc | Always (free run and triggered image acquisition) | Automatic |
acA780-75gm | Always (free run and triggered image acquisition) | Automatic |
acA780-75gc | Always (free run and triggered image acquisition) | Automatic |
acA800-200gm | Always (free run and triggered image acquisition) | Automatic |
acA800-200gc | Always (free run and triggered image acquisition) | Automatic |
acA1280-60gm | Only when the camera is configured for free run image acquisition. | Automatic |
acA1280-60gc | Only when the camera is configured for free run image acquisition. | Automatic |
acA1300-22gm | Always (free run and triggered image acquisition) | Automatic |
acA1300-22gc | Always (free run and triggered image acquisition) | Automatic |
acA1300-30gm | Always (free run and triggered image acquisition) | Automatic |
acA1300-30gc | Always (free run and triggered image acquisition) | Automatic |
acA1300-60gm | Only when the camera is configured for free run image acquisition. | Automatic |
acA1300-60gmNIR | Only when the camera is configured for free run image acquisition. | Automatic |
acA1300-60gc | Only when the camera is configured for free run image acquisition. | Automatic |
acA1300-75gm | Always (free run and triggered image acquisition) | Automatic |
acA1300-75gc | Always (free run and triggered image acquisition) | Automatic |
acA1440-73gm | Always (free run and triggered image acquisition) | Automatic |
acA1440-73gc | Always (free run and triggered image acquisition) | Automatic |
acA1600-20gm | Always (free run and triggered image acquisition) | Automatic |
acA1600-20gc | Always (free run and triggered image acquisition) | Automatic |
acA1600-60gm | Only when the camera is configured for free run image acquisition. | Automatic |
acA1600-60gc | Only when the camera is configured for free run image acquisition. | Automatic |
acA1920-25gm | Only when the shutter mode is set to Rolling, i.e., when Global Reset Release shutter mode is disabled. | Automatic |
acA1920-25gc | Only when the shutter mode is set to Rolling, i.e., when Global Reset Release shutter mode is disabled. | Automatic |
acA1920-40gm | Always (free run and triggered image acquisition) | Automatic |
acA1920-40gc | Always (free run and triggered image acquisition) | Automatic |
acA1920-48gm | Always (free run and triggered image acquisition) | Automatic |
acA1920-48gc | Always (free run and triggered image acquisition) | Automatic |
acA1920-50gm | Always (free run and triggered image acquisition) | Automatic |
acA1920-50gc | Always (free run and triggered image acquisition) | Automatic |
acA2000-50gm | Always (free run and triggered image acquisition) | Automatic |
acA2000-50gmNIR | Always (free run and triggered image acquisition) | Automatic |
acA2000-50gc | Always (free run and triggered image acquisition) | Automatic |
acA2040-25gm | Always (free run and triggered image acquisition) | Automatic |
acA2040-25gmNIR | Always (free run and triggered image acquisition) | Automatic |
acA2040-25gc | Always (free run and triggered image acquisition) | Automatic |
acA2040-35gm | Always (free run and triggered image acquisition) | Automatic |
acA2040-35gc | Always (free run and triggered image acquisition) | Automatic |
acA2440-20gm | Always (free run and triggered image acquisition) | Automatic |
acA2440-20gc | Always (free run and triggered image acquisition) | Automatic |
acA2500-14gm | Only when the shutter mode is set to Rolling, i.e., when Global Reset Release shutter mode is disabled. | Automatic |
acA2500-14gc | Only when the shutter mode is set to Rolling, i.e., when Global Reset Release shutter mode is disabled. | Automatic |
acA2500-20gm | Always (free run and triggered image acquisition) | Automatic |
acA2500-20gc | Always (free run and triggered image acquisition) | Automatic |
acA2500-20gmMED | Always (free run and triggered image acquisition) | Automatic |
acA2500-20gcMED | Always (free run and triggered image acquisition) | Automatic |
acA3088-16gm | Only when the shutter mode is set to Rolling, i.e., when Global Reset Release shutter mode is disabled. | Automatic |
acA3088-16gc | Only when the shutter mode is set to Rolling, i.e., when Global Reset Release shutter mode is disabled. | Automatic |
acA3800-10gm | Only when the camera is configured for free run image acquisition and the shutter mode is set to Rolling. | Automatic |
acA3800-10gc | Only when the camera is configured for free run image acquisition and the shutter mode is set to Rolling. | Automatic |
acA4024-8gm | Only when the camera is configured for free run image acquisition and the shutter mode is set to Rolling. | Automatic |
acA4024-8gc | Only when the camera is configured for free run image acquisition and the shutter mode is set to Rolling. | Automatic |
acA4096-11gm | Always (free run and triggered image acquisition) | Automatic |
acA4096-11gc | Always (free run and triggered image acquisition) | Automatic |
acA4112-8gm | Always (free run and triggered image acquisition) | Automatic |
acA4112-8gc | Always (free run and triggered image acquisition) | Automatic |
acA4600-7gc | Only when the camera is configured for free run image acquisition and the shutter mode is set to Rolling. | Automatic |
acA5472-5gm | Only when the camera is configured for free run image acquisition and the shutter mode is set to Rolling. | Automatic |
acA5472-5gc | Only when the camera is configured for free run image acquisition and the shutter mode is set to Rolling. | Automatic |
acA640-750um | Always (free run and triggered image acquisition) | Automatic |
acA640-750uc | Always (free run and triggered image acquisition) | Automatic |
acA640-90um | Always (free run and triggered image acquisition) | Automatic |
acA640-90uc | Always (free run and triggered image acquisition) | Automatic |
acA640-120um | Always (free run and triggered image acquisition) | Automatic |
acA640-120uc | Always (free run and triggered image acquisition) | Automatic |
acA720-520um | Always (free run and triggered image acquisition) | Automatic |
acA720-520uc | Always (free run and triggered image acquisition) | Automatic |
acA800-510um | Always (free run and triggered image acquisition) | Automatic |
acA800-510uc | Always (free run and triggered image acquisition) | Automatic |
acA1300-200um | Always (free run and triggered image acquisition) | Automatic |
acA1300-200uc | Always (free run and triggered image acquisition) | Automatic |
acA1300-30um | Always (free run and triggered image acquisition) | Automatic |
acA1300-30uc | Always (free run and triggered image acquisition) | Automatic |
acA1440-220um | Always (free run and triggered image acquisition) | Automatic |
acA1440-220uc | Always (free run and triggered image acquisition) | Automatic |
acA1600-20um | Always (free run and triggered image acquisition) | Automatic |
acA1600-20uc | Always (free run and triggered image acquisition) | Automatic |
acA1920-25um | Only when the shutter mode is set to Rolling, i.e., when Global Reset Release shutter mode is disabled. | Automatic |
acA1920-25uc | Only when the shutter mode is set to Rolling, i.e., when Global Reset Release shutter mode is disabled. | Automatic |
acA1920-40um | Always (free run and triggered image acquisition) | Automatic |
acA1920-40uc | Always (free run and triggered image acquisition) | Automatic |
acA1920-40umMED | Only when the Standard camera operation mode is enabled. | Automatic |
acA1920-40ucMED | Only when the Standard camera operation mode is enabled. | Automatic |
acA1920-150um | Always (free run and triggered image acquisition) | Automatic |
acA1920-150uc | Always (free run and triggered image acquisition) | Automatic |
acA1920-155um | Always (free run and triggered image acquisition) | Automatic |
acA1920-155uc | Always (free run and triggered image acquisition) | Automatic |
acA1920-155umMED | Only when the Standard camera operation mode is enabled. | Automatic |
acA1920-155ucMED | Only when the Standard camera operation mode is enabled. | Automatic |
acA2040-90um | Always (free run and triggered image acquisition) | Automatic |
acA2040-90umNIR | Always (free run and triggered image acquisition) | Automatic |
acA2040-90uc | Always (free run and triggered image acquisition) | Automatic |
acA2000-165um | Always (free run and triggered image acquisition) | Automatic |
acA2000-165umNIR | Always (free run and triggered image acquisition) | Automatic |
acA2000-165uc | Always (free run and triggered image acquisition) | Automatic |
acA2040-55um | Always (free run and triggered image acquisition) | Automatic |
acA2040-55uc | Always (free run and triggered image acquisition) | Automatic |
acA2040-120um | Always (free run and triggered image acquisition) | Automatic |
acA2040-120uc | Always (free run and triggered image acquisition) | Automatic |
acA2440-35um | Always (free run and triggered image acquisition) | Automatic |
acA2440-35uc | Always (free run and triggered image acquisition) | Automatic |
acA2440-35umMED | Only when the Standard camera operation mode is enabled. | Automatic |
acA2440-35ucMED | Only when the Standard camera operation mode is enabled. | Automatic |
acA2440-75um | Always (free run and triggered image acquisition) | Automatic |
acA2440-75uc | Always (free run and triggered image acquisition) | Automatic |
acA2440-75umMED | Only when the Standard camera operation mode is enabled. | Automatic |
acA2440-75ucMED | Only when the Standard camera operation mode is enabled. | Automatic |
acA2500-14um | Only when the shutter mode is set to Rolling, i.e., when Global Reset Release shutter mode is disabled. | Automatic |
acA2500-14uc | Only when the shutter mode is set to Rolling, i.e., when Global Reset Release shutter mode is disabled. | Automatic |
acA2500-60um | Always (free run and triggered image acquisition) | Automatic |
acA2500-60uc | Always (free run and triggered image acquisition) | Automatic |
acA3088-57um | Only when the shutter mode is set to Rolling, i.e., when Global Reset Release shutter mode is disabled. | Automatic |
acA3088-57uc | Only when the shutter mode is set to Rolling, i.e., when Global Reset Release shutter mode is disabled. | Automatic |
acA3800-14um | Only when the camera is configured for free run image acquisition and the shutter mode is set to Rolling. | Automatic |
acA3800-14uc | Only when the camera is configured for free run image acquisition and the shutter mode is set to Rolling. | Automatic |
acA4024-29um | Only when the camera is configured for free run image acquisition. | Automatic |
acA4024-29uc | Only when the camera is configured for free run image acquisition. | Automatic |
acA4096-30um | Always (free run and triggered image acquisition) | Automatic |
acA4096-30uc | Always (free run and triggered image acquisition) | Automatic |
acA4096-30umMED | Always (free run and triggered image acquisition) | Automatic |
acA4096-30ucMED | Always (free run and triggered image acquisition) | Automatic |
acA4096-40um | Always (free run and triggered image acquisition) | Automatic |
acA4096-40uc | Always (free run and triggered image acquisition) | Automatic |
acA4096-40umMED | Always (free run and triggered image acquisition) | Automatic |
acA4096-40ucMED | Always (free run and triggered image acquisition) | Automatic |
acA4112-20um | Always (free run and triggered image acquisition) | Automatic |
acA4112-20uc | Always (free run and triggered image acquisition) | Automatic |
acA4112-20umMED | Always (free run and triggered image acquisition) | Automatic |
acA4112-20ucMED | Always (free run and triggered image acquisition) | Automatic |
acA4112-30um | Always (free run and triggered image acquisition) | Automatic |
acA4112-30uc | Always (free run and triggered image acquisition) | Automatic |
acA4112-30umMED | Always (free run and triggered image acquisition) | Automatic |
acA4112-30ucMED | Always (free run and triggered image acquisition) | Automatic |
acA4600-10uc | Only when the camera is configured for free run image acquisition and the shutter mode is set to Rolling. | Automatic |
acA5472-17um | Only when the camera is configured for free run image acquisition and the shutter mode is set to Rolling. | Automatic |
acA5472-17uc | Only when the camera is configured for free run image acquisition and the shutter mode is set to Rolling. | Automatic |
boA4096-93cm | Always (free run and triggered image acquisition) | Automatic |
boA4096-93cc | Always (free run and triggered image acquisition) | Automatic |
boA4112-68cm | Always (free run and triggered image acquisition) | Automatic |
boA4112-68cc | Always (free run and triggered image acquisition) | Automatic |
daA1280-54lm | Only when the camera is configured for free run image acquisition. |
Manual |
daA1280-54lc | Only when the camera is configured for free run image acquisition. |
Manual |
daA1600-60lm | Only when the camera is configured for free run image acquisition. |
Manual |
daA1600-60lc | Only when the camera is configured for free run image acquisition. |
Manual |
daA2500-14lm | Only when the shutter mode is set to Rolling, i.e., when Global Reset Release shutter mode is disabled. |
Automatic |
daA2500-14lc | Only when the shutter mode is set to Rolling, i.e., when Global Reset Release shutter mode is disabled. |
Automatic |
daA2500-60mc (SD820) | Always | Automatic |
daA1280-54um | Only when the camera is configured for free run image acquisition. | Manual |
daA1280-54uc | Only when the camera is configured for free run image acquisition. | Manual |
daA1600-60um | Only when the camera is configured for free run image acquisition. | Manual |
daA1600-60uc | Only when the camera is configured for free run image acquisition. | Manual |
daA1920-15um | Only when the shutter mode is set to Rolling, i.e., when Global Reset Release shutter mode is disabled. | Automatic |
daA1920-30um | Only when the shutter mode is set to Rolling, i.e., when Global Reset Release shutter mode is disabled. | Automatic |
daA1920-30uc | Only when the shutter mode is set to Rolling, i.e., when Global Reset Release shutter mode is disabled. | Automatic |
daA2500-14um | Only when the shutter mode is set to Rolling, i.e., when Global Reset Release shutter mode is disabled. | Automatic |
daA2500-14uc | Only when the shutter mode is set to Rolling, i.e., when Global Reset Release shutter mode is disabled. | Automatic |
puA1280-54um | Only when the camera is configured for free run image acquisition. | Manual |
puA1280-54uc | Only when the camera is configured for free run image acquisition. | Manual |
puA1600-60um | Only when the camera is configured for free run image acquisition. | Manual |
puA1600-60uc | Only when the camera is configured for free run image acquisition. | Manual |
puA1920-30um | Only when the shutter mode is set to Rolling, i.e., when Global Reset Release shutter mode is disabled. | Automatic |
puA1920-30uc | Only when the shutter mode is set to Rolling, i.e., when Global Reset Release shutter mode is disabled. | Automatic |
puA2500-14um | Only when the shutter mode is set to Rolling, i.e., when Global Reset Release shutter mode is disabled. | Automatic |
puA2500-14uc | Only when the shutter mode is set to Rolling, i.e., when Global Reset Release shutter mode is disabled. | Automatic |