Copy and replace pixels

Available with Image Analyst license.

The Capture group contains Copy Region and Replace Region . These tools copy or replace pixels from the same dataset or from a different dataset in the map. If using another dataset within the map, use the Source Layer drop-down list to set the correct map layer to use; this layer must have the same bit depth as the raster being edited. The target layer is always the raster dataset that you are editing.

You can use the Copy Region and Replace Region tools to improve problematic areas in your imagery, such as areas obscured by clouds. You can replace the clouds with another area that is not cloudy. This replacement region can come from another image overlapping the area, or another area in the same image. When copying a region, and the active region is still in preview mode, you can use the yellow handle in the middle of the region to move it to the appropriate location.

For the best results, the replacement region should be of similar radiometry and seasonality. If the result of the replaced multispectral or panchromatic region does not look seamless, you can use color matching and blending techniques to make the region appear seamless. Color matching adjusts the color of the new region to match the base imagery, while blending feathers the pixels along the perimeter of the region.

While the region is active and in preview mode, you can use the Color Match drop-down choices to color match the region:

• None—No color matching will be performed.
• Standard—All the pixels in the region will be used to compute the color match.
• Only along edges—Only the pixels along the perimeter of the region will be used to compute the color match.

Check the Blend Width check box to turn on the blend feature. The text box allows you to choose how many pixels along the perimeter of the region to use.

When the preview is acceptable, you can double-click anywhere on the map to update the region.

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