Capturing High Quality Point Clouds

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Introduction

Zivid cameras have 4 ways to change the exposure; projector brightness, exposure time, aperture opening, and imaging gain. In this tutorial, we will first explore what the different exposure variables are, how they work, and which considerations should be taken when using them. Then we will apply these principles to establish a simple 3D imaging technique that aims at acquiring high-quality point clouds.

We recommend starting by visiting Camera Settings to learn about the exposure variables and available filters. The articles which we recommend as a prerequisite for this tutorial are:

It is also valuable to learn How to get Good 3D Data on a Pixel of Interest as a preparation for the following tutorial.

3D Imaging Techniques

In this session, we will present a 3D imaging technique that utilizes the histogram to evaluate our point cloud in a predictable and step-by-step manner to acquire good 3D point clouds. The procedure can be divided into three steps:

  1. Working distance and camera positioning

  2. Getting the right exposure for good point clouds

  3. Adjusting filters

If you are using Zivid Two camera, check Standard Acquisition Settings to see Settings presets that provide good 3D point clouds for different scenes.

We will also cover some more advanced topics such as specifically dealing with highlights and lowlights, and taking environmental factors into consideration, such as ambient light and choice of background.

Advanced tutorials:

Further reading

To learn more about acquiring high-quality 3D point clouds with Zivid cameras, continue to working distance and camera positioning.

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