Terms
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Definitions
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Binary mask
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A binary image with the same size as the image you want to process. The mask contains 1's for all pixels that are part of the region of interest, and 0's everywhere else.
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Filling a region
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A process that "fills" a region of interest by interpolating the pixel values from the borders of the region. This process can be used to make objects in an image seem to disappear as they are replaced with values that blend in with the background area.
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Filtering a region
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The process of applying a filter to a region of interest. For example, you can apply an intensity adjustment filter to certain regions of an image.
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Interpolation
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The process by which we estimate an image value at a location in between image pixels.
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Masked filtering
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An operation that applies filtering only to the regions of interest in an image that are identified by a binary mask. Filtered values are returned for pixels where the binary mask contains 1's; unfiltered values are returned for pixels where the binary mask contains 0's.
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Region of interest
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A portion of an image that you want to filter or perform some other operation on. You define a region of interest by creating a binary mask. There can be more than one region defined in an image. The regions can be "geographic" in nature, such as polygons that encompass contiguous pixels, or they can be defined by a range of intensities. In the latter case, the pixels are not necessarily contiguous.
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