Locally Adaptive Contrast Enhancement Filter for RGB and Multi-Band Raster Sets
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چکیده
Portion of a Landsat TM scene (Bands 3, 2, 1 as RGB) with normalized contrast enhancement. Dark lava flows and bright salt flats reveal little local detail. Same scene with the RGB LACE filter applied with Normalized input redistribution. The final image is a weighted average of the LACE filter output (90%) and the original image (10%). Enhanced contrast in dark and light areas brings out significant surface detail throughout the image. The Locally Adaptive Contrast Enhancement (LACE) filter can now be applied not only to a single grayscale raster, but to an RGB raster set, a color composite raster, or to a raster set with more than three component rasters (multi bands). The LACE filter is designed to improve local contrast for images that include both very dark and very bright areas.
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