Undersampled images are, for example, common in astronomy because instrument designers are frequently forced to choose between properly sampling a small field of view and undersampling a larger field.

According to astrophotographer David Ratledge, 'Results using the DRIZZLE command can be spectacular with amateur instruments.' Overview Ĭamera optics generally introduce geometric distortion of images. In addition, it is possible to use drizzling to combine dithered images in the presence of cosmic rays.ĭrizzling is commonly used by amateur astrophotographers, particularly for processing large amounts of planetary image data (typically several thousand frames), drizzling in astrophotography applications can also be used to recover higher resolution stills from terrestrial video recordings. The algorithm, known as variable-pixel linear reconstruction, or informally as 'Drizzle', preserves photometry and resolution, can weight input images according to the statistical significance of each pixel, and removes the effects of geometric distortion on both image shape and photometry. It is normally used for the combination of astronomical images and was originally developed for the Hubble Deep Field observations made by the Hubble Space Telescope.

Drizzle (or DRIZZLE) is a digital image processing method for the linear reconstruction of undersampled images.

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