SBOU157 September   2015 OPT8241

 

  1.   Voxel Viewer
    1.     Trademarks
    2. 1 Introduction
      1. 1.1 TI 3D Depth Sensors
      2. 1.2 Operating Principles
      3. 1.3 Voxel Viewer and Voxel SDK
    3. 2 User Interface
      1. 2.1 Menu Bar
        1. 2.1.1 File
        2. 2.1.2 Settings
          1. 2.1.2.1 Camera Profiles
          2. 2.1.2.2 Edit Profiles
          3. 2.1.2.3 Statistics
        3. 2.1.3 Windows
        4. 2.1.4 Help
      2. 2.2 Source Bar
      3. 2.3 Main Viewport
      4. 2.4 Left Pane
        1. 2.4.1 Side Viewports
      5. 2.5 Right Pane
        1. 2.5.1 Frequently Used Parameters Window
        2. 2.5.2 Parameter List Window
      6. 2.6 Bottom Pane
        1. 2.6.1 Watch List and Statistics Window
        2. 2.6.2 Data Flow Diagram Window
        3. 2.6.3 Logs Window
    4. 3 Basic Operations
      1. 3.1 Connecting Devices
      2. 3.2 Adjusting the Settings
      3. 3.3 Visualizing the Data
        1. 3.3.1 Ambient
        2. 3.3.2 Amplitude
        3. 3.3.3 Depth
        4. 3.3.4 Distance
        5. 3.3.5 Phase
        6. 3.3.6 Point Clouds
        7. 3.3.7 Histogram
      4. 3.4 De-Noising
        1. 3.4.1 Temporal Filters
          1. 3.4.1.1 IIR Filter
          2. 3.4.1.2 Median Filter
        2. 3.4.2 Spatial Filters
          1. 3.4.2.1 Smooth Filter
          2. 3.4.2.2 Bilateral Filter
          3. 3.4.2.3 Median Filters
        3. 3.4.3 Recommended Starting Point
    5. 4 Calibration
      1. 4.1 Lens Calibration
      2. 4.2 Frequency Calibration
      3. 4.3 Crosstalk Calibration
      4. 4.4 Nonlinearity Calibration
      5. 4.5 Temperature Calibration
      6. 4.6 Common Phase Calibration
      7. 4.7 Pixel-Wise Calibration
      8. 4.8 Profiles and Calibration
    6. 5 TFC Programming
    7. 6 Summary
    8. 7 References

4.7 Pixel-Wise Calibration

For high-precision applications, pixel-to-pixel calibration is recommended. This calibration step attempts to overcome the finer pixel-to-pixel variation. Since the variation is compensated for each pixel, this calibration requires a larger storage space on the EEPROM; and only one copy of the pixel variation map can be stored. In Section 4.8, the entire calibration sequence is summarized, and one will see that only one profile can have pixel-wise calibration stored to EEPROM.

To calibrate, point the camera at a flat wall where the wall covers the entire field-of-view. Figure 34 shows the pixel-wise calibration window. Clicking the Calibrate button in the calibration window will bring up the frame capture window, which will sample and average 200 frames. It is critical to keep the camera still during this time.

fig34_sbou157.gifFigure 34. Pixel-Wise Calibration Window
fig35_sbou157.gifFigure 35. Frame Capture Window