Blob Analyzer The two HSL modes let you specify H, S, and L values for both Color and Tolerance. These can be set numerically, using values from 0 to 255, or in a color or greyscale window, by adjust- ing the size and location of a selection box. Color: l Hue determines the colors to be considered. This is depicted and con- trolled by the horizontal location of the selection box within the color selection window. l Saturation determines the intensity of the hues to be considered. This is depicted and controlled by the vertical location of the selection box within the color selection window.
l Luminance (or Lightness) sets the brightness of the colors that appear within the color selection window. Increasing luminance is like adding white to a color. Tolerance: l Tolerance values are distributed equally above and below the color range to which they apply. A larger tolerance value will include a larger number of colors. l Hue tolerance determines how wide a range of colors will be considered. This is depicted and controlled by the width of the selection box. l Saturation tolerance determines the range of intensity of colors to be considered. This is depicted and controlled by the height of the selection box.
l Luminance (or Lightness) tolerance determines the range of brightness to be considered for valid blobs. This is depicted and controlled by the width of the selection box in a grey scale selection window below the color selection window. HSL Inside The HSL Inside mode sets an HSL range that specifies what colors can be con- tained in a valid blob. HSL Outside The HSL Outside mode sets an HSL range that specifies what colors cannot be contained in a valid blob. Configuring Thresholds Threshold functions set values at which image segmentation takes place. Depending on the segmentation mode selected, there may be either a single threshold or a double threshold.
ACEUser's Guide, 3.6.x, 18316-000 Rev A Page 408