BEFORE

To address the wide dynamic range of features on the sun, it is sometimes necessary to combine two images, one short exposure and one long exposure, into what is known as a composite image. The overexposed regions from the long exposure are replaced with those properly exposed from the shorter exposure. In addition, all optical instruments have a natural 'blurring' or point-spread function. A composite image is particularly amenable to removal of the point-spread function of the instrument. This is done by a mathematical process called deconvolution.

AFTER