# 3D-L4000 Series Vision System Wizard – Filter Settings

The 3D-L4000 Series Acquisition Wizard contains additional point cloud filtering settings for 3D-L4000 series vision systems on its Filters tab. You can modify these settings before field correction is finalized.

Setting | Description
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Median Filter | Enables a median filter that replaces existing data point values with their median, calculated within a pre-defined window around the data point. Tip: Check this option to remove random spike noises and smooth the point cloud.
Gap Filling | Enables a gap filling filter (and its parameters) that creates values for missing data points (or "gaps") between two neighboring data points along a profile.
Gap Filling Mode | Specifies how to compensate distance separations in the acquired image data. Linear Interpolation: Gap filling is performed by linear interpolation between the two gap endpoints. Using Lower Z Value: Gap filling is performed by using the smaller value of the two gap endpoints.
Gap Size | Specifies an upper threshold for the distance between the two gap endpoints. Whenever a gap smaller than the configured value is identified, gap filling is performed as configured with the Gap Fill Mode property (but gaps larger than or equal to the specified value will be left intact). The value range is 0.001 – 480, and the default value is 1.
Z Discontinuity Threshold | Specifies an upper threshold for the Z-difference between the two gap endpoints. Gaps with a Z-difference lower than the specified value will be filled as configured with the Gap Fill Mode property (but gaps having a Z-difference larger than or equal to the specified value will be left intact). The value range is 0.001 – 750, and the default value is 0.5.
Spike Removal | Enables or disables the In-Sight 3D spike removal filter, which you can use to remove the values of existing data points with false heights or spike noises. Note: Spike removal is applied after gap filling. Therefore, points removed by the spike removal filter will not be filled in by the gap filling algorithm.
Strength | Specifies the level of intensity for the Spike Removal filter. Higher numeric values mean stronger filtering.
Spike Hole Filling | Secondary hole filling, runs after spike removal to fill the gaps left by removed spikes. Check the checkbox to enable the Spike Hole Filling.
Spike Hole Filling Mode | Specifies how to create the missing data between two spike hole endpoints. Linear Interpolation: Creates the missing data by the linear interpolation of the two spike hole endpoints. Lower Z Value: Creates the missing data by using the smaller Z value of the two spike hole endpoints.
Maximum Spike Size X | Specifies the length of the maximum coverage for each spike along the profile X axis.
Minimum Spike Size Z | Specifies the minimum Z difference between a spike and its surrounding non-spike surface.