# Haze over ov7251 Tracking Camera.

Source: https://forum.modalai.com/topic/3669/haze-over-ov7251-tracking-camera
Category: ESCs, Sensors and Accessories (https://forum.modalai.com/category/15/escs-sensors-and-accessories)
Tags: image-sensor
Posted: 2024-07-24 02:36:27 UTC by Jetson Nano
Replies: 1 · Views: 444

## Jetson Nano · 2024-07-24 02:36:27 UTC

Hey @Alex-Kushleyev @James-Strawson 

I'm using a Starling 2 with VOXL 2 setup on a custom airframe build. I'm currently testing the setup with [SDK release 1.2.0](https://docs.modalai.com/sdk-1.2-release-notes/).

In the initial testing, in the QVIO server as from the input pipeline was displaying a clear display of features. But over time, the QVIO server output feed has been blurry with a kind of haze being formed around camera frame as seen in the feed. This reduces the features being captured, and the drone loses VIO many a times ultimately loosing position.

![Screenshot 2024-07-24 at 8.03.17 AM.jpg](https://forum.modalai.com/assets/uploads/files/1721788500725-screenshot-2024-07-24-at-8.03.17-am.jpg) 

Is there any way we can clear this haze and initialise the QVIO server?

**Note**: Also checked if it was a physical damage to the Lens or hardware but hardware seems to be fine.

## Reply by Alex Kushleyev (ModalAI staff) · 2024-07-24 18:29:45 UTC

@Jetson-Nano ,

Can you please double check your `/etc/modalai/voxl-camera-server.conf` to make sure that the tracking camera has `"en_raw_preview"` set to true?

It is hard to tell whether there is haze in the image (the tracking camera has 640x480 resolution and if you zoom in, it may appear that the details are blurry). If you have another tracking camera to compare to, please try. Also please try looking at the image from `voxl-portal` (original tracking image and overlay image).

Alex