Some practical aspects of image restoration

摘要

AbstractRestoration procedures can greatly sharpen and beautify the details of an image, but they also have some drawbacks. Some of these adversely affect the photometry of stars in an astronomical image. One trouble is nonlinearity; another is that the restored pixels are no longer statistically independent. A more subtle problem is that the comparison of images in different wavelength bands poses an unusual requirement of identical restoration of two images that have different values of signal‐to‐noise ra