Hello, thank you for the great products, these cameras have helped me a lot in my work. Currently, i’m researching the phenomenon of depth inaccuracies caused by temperature on the Zed Mini and Zed 2i cameras. Typically, I hold the camera in the same position and measure depth at a single point for several hours, and the measured depth gradually decreases over time (the illustration shows that, when measuring at a real distance of 5 meters, in 3 hours, the temperature of the Zed Mini camera increased from 25 to 45 degrees Celsius, and the measured depth decreased, with an inaccuracy of over 60 cm). At shorter distances, the inaccuracy is smaller. I’ve tried simulating this behavior using a pinhole model, assuming something inside expands due to the temperature increase, increasing the distance between the lens and the sensor, thus increasing the inaccuracy and reducing the depth. However, the simulation is not yet close to reality. Could you provide me with detailed information about the camera’s internal structure (lens placement, sensor placement, etc.), as well as the materials used for the camera housing, lens mount, and circuit board? I need this information to fine-tune the simulation input data. Please also provide information about the Zed Mini and Zed 2, as I am conducting experiments with them.
Hi @phan_hieu
Thank you for the interesting analysis.
Can you please add useful information?
- ZED SDK version
- Depth mode
- camera resolution
- target type