You can remove speckles or stray pixels from your bitonal image.
Speckles can appear in an image when you scan drawings or blueprints that are dirty or wrinkled, or when the scanner itself is dirty. The process consists of three main actions:
- Specify the area to be cleaned. Draw a rectangle around the region, despeckle the entire image, or define a smaller region by means of a polygon, clip region, or an existing vector entity.
- Specify the maximum size of pixel to delete. Click an existing speckle for this purpose, or define the size by drawing a small rectangle or entering a numeric value in drawing units or number of pixels.
AutoCAD Raster Design toolset then searches the image to identify speckles that are equal to or smaller than the defined speckle size, highlighting those that meet your criteria.
- Inspect the identified speckles, then press Enter to delete them, or respecify the speckle size, or deselect any speckles you want to keep.