[D405] Is it possible to stream IR and depth images with different resolutions?

[HanzDieter]

Hello,

I have an Intel Realsense D405. I want to have different resolutions for IR stream and depth stream. But with the code snipped below I get an error. There is no error, if the depth and IR stream have the same resolution.
If this is not possible with IR streams, I can switch to RGB stream.
Does anyone has a solution for that?

int width = 1280;
	int height = 720;
	int fps = 30;
rs2::config config;
	config.enable_stream(RS2_STREAM_INFRARED, 1, width, height, RS2_FORMAT_Y8, fps);
	config.enable_stream(RS2_STREAM_INFRARED, 2, width, height, RS2_FORMAT_Y8, fps);
	config.enable_stream(rs2_stream::RS2_STREAM_DEPTH, 640, 320, rs2_format::RS2_FORMAT_Z16, fps);
	

	// start pipeline
	rs2::pipeline pipeline;
	rs2::pipeline_profile pipeline_profile = pipeline.start(config);

When using the Intel Realsense viewer, the depth stream has always half the resolution of the IR stream.

best regards,
Hanz

[MartyG-RealSense]

Hi @HanzDieter 1280x720 resolution at 30 FPS is supported as a configuration for the depth stream. The RealSense Viewer's 'i' information overlay just always shows depth as half the defined resolution.

For the D405 model, all stream types (depth, infrared, RGB) should be set to the same resolution and FPS. So you could either have depth, Infrared 1 and Infrared 2 set to 1280x720 / 30 FPS, or depth and RGB set to 1280x720 / 30 FPS. Either configuration should work.

[HanzDieter]

It is possible to reduce Resolution of the depth stream by using the decimation filter! For more information: https://dev.intelrealsense.com/docs/post-processing-filters

[MartyG-RealSense]

The Decimation filter is certainly a way to have the same resolution in the config instructions but downsample the depth stream to a lower resolution. So it is a good workaround for your situation Thanks very much for the update!