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Scale

Before After

 

Scale increases or decreases the size of a raster image.

 

1.    Select Raster Effects Menu > Scale.

2.    Type X and Y scale factors into the dialog.

3.    Select the Interpolation Type from the following options:-

§ 3.1  Nearest neighbour – This is the simplest form of scaling. Each pixel is scaled by the scale factor. When scaling up, the image may display a measure of blockiness/jaggedness, (an effect often referred to as ‘staircasing’). This scaling method can be used on any type of image.
§ 3.2  Tile 2×2 – This scaling option will ignore any X and Y scale factors previously set. The X and Y scale factors will both be set to 2. Scaling with this method attempts to reduce the previously referenced ‘staircasing’. This scaling method can only be used to scale up by a factor of 2 and can be used on any type of image.
§ 3.3  Bicubic – This scaling option applies bicubic filtering to sample nearby pixels in an effort to ‘guesstimate’ what the missing pixels would look like in a larger image. This results in less ‘staircasing’ but will produce a softer, less sharp, image. This scaling method can only be used on 24bit color images.
§ 3.4  Bilinear – As 3.3 above but applies bilinear filtering. Results will be softer than 3.3. This scaling method can only be used on 24bit color images.
§ 3.5  BSpline – As 3.3 above but applies bspline filtering. Results will be softer than 3.4. This scaling method can only be used on 24bit color images.

4.   Click OK.

 

Undo does not affect Scale.

 

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