SNR Value
The Zivid Signal-to-Noise Ratio (SNR) is a measurement of pixel quality. Its value represents the measured SNR where the signal is the projected patterns. The SNR ranges from 0 to 255 (8-bits) and describes how well Zivid can read back the projected signal for a given pixel. The higher the SNR, the higher confidence Zivid has that it was able to correctly estimate the distance for that particular pixel. A low SNR will have more pixel noise in the 3D point cloud than a high SNR pixel from measurement to measurement. The SNR map in Zivid Studio provides a visual representation of the distribution of SNR values within a capture. Visit the Studio Guide for an introduction to the feature.
![Signal and noise over light intensity](../../../_images/snr_over_light_intensity.png)
For this reason, it is recommended to correctly expose the Zivid camera. The pixels should have an average intensity above 32 and under 255. This is a healthy SNR value. A quick tip is to use the histogram function (hotkey H) in Zivid Studio, as shown below. For a more in depth tutorial on how to use this, see Getting the Right Exposure for Good Point Clouds.
![Signal and noise over light intensity with histogram](../../../_images/snr_over_light_intensity_with_histogram.png)
Version History
SDK |
Changes |
---|---|
2.8.0 |
The SNR map feature is added to Zivid Studio. |