f traffic lights captured by the camera.

yohu

The video is obtained from a ROS2 topic of the camera. There are two issues with the colors of the traffic lights in the video: one is color deviation, where red turns into a yellowish hue; the other is color disappearance, where either the red or green color suddenly disappears and then slowly reappears (in reality, the red or green color has always been present). We publish the image topic using compression. Can these two issues be resolved through hardware settings? How should we configure it?

You

yohu

jakaskerl

Hi @yohu
Which sensor is this?

The color deviation is likely caused by chroma and luma denoise, try changing those values.

setChromaDenoise(chroma_denoise)
setLumaDenoise(luma_denoise)

The second, no clue; I'm thinking it could be due to slight misalignment between camera FPS(exposure) and traffic light frequency.

Thoughts?

yohu

jakaskerl Okay, thank you. We are using ROS for the driver, and upon checking, it seems that this setting parameter is not available. Where can I find this setting, and is there a webpage with documentation?

jakaskerl

Hi @yohu
I don't think it is exposed in the ROS driver, so you can not use it with ROS at the moment.

Thanks,
Jaka