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FAQ

Why does the image get horizontal stripes?

Article No: KA-10476
Version: 1.0
Subject to change without notice
What is the reason for horizontal stripes in the image and how can it be solved?
Related Products
picoCam2
midiCam2

Table of Contents

Why does the image get horizontal stripes?

Horizontal stripes in the images are usually caused by bandwidth problems, resulting in incomplete images.

 

To avoid this effect, configure the the NIC to which the camera is connected to like this: 

  • Enable Jumbo frames
  • Increase receive buffers

Make sure the NIC and any switches used support at least 1Gbit/s to ensure a consistent connection. If you connect multiple cameras to the computer, you get the best performance if each camera is connected to its own NIC.

Calculate data rate from the camera

When troubleshooting horizontal stripes you can calculate the total data rates from the camera and compare it with the NIC capacity.

 

Below is an example showing how to calculate the data rate from a camera.


Frame rate = 20 frames/s
Pixelformat =  8 bit 
Image width = 2048
Image height =  1536

 

bits/frame = 8 * 2048 * 1536 = 25 165 824 bits/frame
bits/s = 20 * 25 165 824 = 503 316 480 ~ 0.503 Gbit/s

 

If the camera sends data at a rate higher than the NIC can handle you can either

  • Upgrade the NIC to handle higher speed

  • Reduce the camera data rates by modifying the camera configuration. This can be done by:

    • Lowering the frame rate

    • Reducing the image resolution
Keywords:
picocam2, midicam2, picocam, midicam, horizontal , stripes
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