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

3.4.2.1 Smooth Filter

The smooth filter is a spatial filter that applies a 2D Gaussian function to compute weighted average about the square kernel centered about a given pixel. The effect of the Gaussian function is smoothing of high-frequency elements (for example, sharp spatial changes), such as speckle noise. It is equally important to note that the actual scene may contain high-frequency structural elements, such as edges, will be smoothed by this filter also. The property, sigma, specifies how much smoothing is applied—the larger the value, the more smooth (and blurry). Generally the smooth filter is applied to the phase map.

fig19_sbou157.gifFigure 19. Smooth Filter Property