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Hugin image stacking1/7/2024 The very first thing I see is a dramatic drop in sensor "noise". Looking at the blended image stack examples I see the results can be pretty interesting. Compared with the following two "superresolution" examples that follow, the simple "cubic" up-rez technique is somewhat lacking. F ollowing my early attempts at understanding "superresolution", this approach still has some promise. Image problems (shake, mis-focus, etc) and sensor "noise" are amplified. Using the Gimp's "cubic" Image Scale function quickly generates a 9500pixel file from the base 4900+pixel image. ![]() This is fundamental to understanding how to retain the most image quality when performing an up-rez.įor this comparison I set the "cubic" filter sample rate to 1200dpi. In clear terms - to perform a 2x up-rez requires, minimally, a 600dpi filter sample rate. Note: What I've learned is that by increasing the sample rate of the "cubic" filter that the output up-rez'd image will contain fewer artifacts. Up-rez'ing an image at 150dpi or 300dpi will yield jagged edge transitions and will amplify "noise" across an image field. My early understanding of how "cubic" up-rez works was insufficient. Printing at 300dpi using the native 16mpixel sensor resolution of the Sony NEX-5T will easily generate a 17inch on the long dimension high resolution image.Īs for the "superresolution" techniques, here is what I have thus far experienced. They are sharp and contrasty in the base image. Regarding the optics, all three lenses performed very well, indeed. Gimp (v2.8) to apply a 2 pixel unsharp mask. ![]() ![]()
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