Dersch’s A and B vs. Zoom
It seems like we’ll be waiting some time for the camera that takes the view you saw and makes it into a picture on its own. On the way to this goal a number of problems turned up that were solved on the computer. Low dynamic range (high contrast) was improved by bracketing and enfusing; barrelling (radial distortion) by determining the Dersch coefficients (left) and applying a counter-distortion; and chromatic aberration by measuring sets of aberrations (below right) and remapping the colour channels so that they now matched each other. What we might also like to do is process RAW images, save copies of the originals, both as JPG and in a sturdier format such as PNG. And while we’re moving the formats around, taking care that the EXIF data gets transferred too, perhaps a little extra data could be included. Then some postprocessing like Advanced Tone Mapping. And finally, thumbnailing and sharpening so that the images can be experimented with. Oh dear, it seems like Christmas is rather early this year. Continue reading
