Zed X Blurry/Soft Image Quality

It seems that NVIDIA reintroduced a broken version of the library libnvisppg.so when updating the device with sudo apt upgrade or other methods.

You can install the working library by unpacking the .deb and data.tar.gz and then copy /data/tmp/R36.4.3/libnvisppg.so to /usr/lib/aarch64-linux-gnu/tegra/libnvisppg.so

First of all download the ZED X Driver installer from the download page.

sudo apt install nginx
ar x stereolabs-zedbox-mini_1.3.1-SL-MAX9296-all-ZEDBOX-MINI-L4T36.4.0_arm64.deb
tar xvf data.tar.xz
sudo cp ./tmp/R36.4.3/libnvisppg.so /usr/lib/aarch64-linux-gnu/tegra/libnvisppg.so

Then reboot.

This should solve the problem.

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Hi @Myzhar ,
I was also getting blurry images from the ZED X Mini camera. I am using the ros2 wrapper running on a Jetson Orin AGX. I applied your solution - it succeeded in getting rid of the blurry images, but now the images are very grainy. Is there a solution to get rid of the noise? I tried playing around with the denoising paramter but it did not have a very huge impact on the overall result.

Hi @Betgov
Welcome to the Stereolabs community.

With the patch applied you can use the video setting DENOISING to tune this behavior.

You can test it with ZED Explorer to find the value that fulfills your requirements.

@Myzhar Thank you for your response!:slight_smile: I’ve already experimented with the Denoising setting. It helped a bit after changing the parameter value from 50 to 80 and finally to 100, but overall, the images are still grainy especially in the regions where there are black colors. I am attaching the output after changing the denoising parameter(ros2 wrapper config) to 100 here for your reference(It is the same in the ZED Explorer as well). Is there any other setting that I could try changing?

Normally, this behavior is caused by an automatic increasing of the Gain values (analog or digital) because of low light conditions.

Please try to set the gain to a fixed value or improve the light conditions.

Are you using a polarized camera indoors? Polarized optics slightly reduces the amount of light hitting the CMOS sensors, while this is not a problem outdoors, it can cause grainy images indoors.

I am not using a polarized camera. Also, the room is bright. I will try tweaking the gain values though and get back to you. Thanks for your help!

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