# Image Processing and Coordinate Spaces

Whenever you use an image processing tool to produce a new image by processing the pixels in an input image, the image processing tool is responsible for establishing the coordinate space tree of the output image. Image processing tools generally modify the image's coordinate space tree so that the relationship between pixel space ("#") and root space reflects the effect of the image processing operation. For example, if you use the Gaussian Sampling tool to subsample and smooth an image, the resulting output image will have its space tree adjusted so that the location of features in the smoothed and sampled image is the same as their locations in the input image.

See the following topics: