dodal.devices.oav.pin_image_recognition.PinTipDetection#
- class dodal.devices.oav.pin_image_recognition.PinTipDetection[source]#
A device which will read from an on-axis view and calculate the location of the pin-tip (in pixels) of that frame.
Used for pin tip centring workflow.
Note that if the tip of the sample is off-screen, this class will return the tip as the “edge” of the image.
If no tip is found it will return {INVALID_POSITION}. However, it will also occasionally give incorrect data. Therefore, it is recommended that you trigger this device, which will attempt to find a pin within {validity_timeout} seconds if no tip is found after this time it will not error but instead return {INVALID_POSITION}.
Methods
trigger()Attributes
INVALID_POSITION