In-camera processing of long-exposure RAW data

Started Jan 21, 2010 | Discussions thread
OP Marianne Oelund Veteran Member • Posts: 7,791
Comparison example: D7000 versus old HPS algorithm

This example compares the new D7000 HPS algorithm to the old algorithm, using a test image with a couple of features added. You will see that although there is some loss of brilliance of fine features overall, the D7000 version algorithm doesn't produce nearly as dismal of a result as the old algorithm did.

Test features added to the original image include a set of 3 simulated hot pixels, which are removed by both algorithm versions, as desired. However, a small 2x2 pixel simulated star image is also removed by the old algorithm, showing why it is so disliked by the astrophotography community. The D7000 algorithm successfully leaves this small object intact.

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