Accurate RGB color output via HDMI on Jetson TX2

Robotics & Edge Computing Jetson & Embedded Systems Jetson TX2
1

Hi,

We use jetson tx2 for video processing of incoming MIPI video data.
Right now, we must make sure that exactly the RGB color values are output via HDMI that we read in with our device via MIPI.
We have encountered this topic in the past, last we thought we had solved it. Unfortunately, this is not the case. Now we want to understand exactly how it leads to the behavior and make sure that the correct color values are really output.

To investigate only this behavior, we use the Jetson Tx2 developer kit with a newly flashed TX2 module.
At first, we ignore MIPI and just try to output an image from file on the TX2 using feh.
But we are not able to output this with exact RGB values.
To give an example: The RGB value of the image file is (0|0|0) but we read e.g. (1|1|1) from HDMI.

In the enclosed file, we describe our procedure of testing and our results in more detail.

How can we get the TX2 to output exactly the colour values we expect?

Best regards

Michael
RGB value accurate image output with the Jetson TX2 via HDMI.pdf (369.1 KB)

3

Not sure if this is similar to this one.

4

Thanks for your quick response. Looks similiar to our case. I will report as soon as we have tested it.

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