What's the point in using an external HW trigger or a SW trigger for L515?
Dear all
I checked the interesting previous posts
L515 inconsistent frame counts with external trigger – Intel RealSense Help Center
L515 external hardware sync information – Intel RealSense Help Center
Depth analysis for high speed moving products with external trigger – Intel RealSense Help Center
because i will probably need to develop a medium speed grabbing of objects ( 0.5 m/sec ) with an L515. So I was wondering how fast can be the L515 in grabbing an image&depth at an hardware or software trigger given when the object is in the central position of the FOV (deducted from previous sensor and encoder positions). But I see from the posts that there is a delay of 60 to 120 msec in taking the image&depth since external HW trigger so I wonder if it isn't better to keep the continuous streaming ON (no triggering and laser always ON) and just reject the data that are too early and keep the data (image&depth) that arrive at the would-be-trigger time. Same question holds for SW trigger. Can you please give advice abut that? It seems that doing so I would have more accurate data, right? Could you please point me at the section of SDK documentation where external HW trigger and SW trigger (if available) are described?
Thank you so much
Best regards
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Hello Alessio,
There is no description of the external triggering mechanism on the librealsense SDK Github page but the Multi-Camera Configurations with L515 whitepaper provides a description. Notice in the whitepaper that the use case example is of a static object with multiple cameras around the object capturing frames from different points of view. This is the main use case for multiple L515 cameras. As you correctly pointed out, it is challenging to capture fast-moving objects with this mechanism.
Sincerely,
Jesus G.
Intel Customer Support
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