megapickles

« Previous \| Home \| Next »	Bristol Jun 04, 2008 - 09:32PM
One of my projects on this summer’s punch list is to learn how to process HDR images—High Dynamic Range, for non-photographers, where the contrast in light and dark values exceeds the ability of the camera sensor to record them simultaneously. Over the years, I have done a lot of blending and compositing of separate exposures to overcome this problem, but the technique does not work well for all images. So, 32 bit HDR processing to the rescue. First I tried some pictures of a pile of laundry here at Megapickles Headquarters. The process seemed easy enough and the results were fine—avoiding the creepy look that I see in lots of HDR work. Encouraged, today I took it to the field. Alas, after tossing out several attempts, this is the only one that sort of works. There is a tiny bit of ghosting in the leaves, even though it felt like a perfectly still day. I do not have sufficient control over the distribution of tones (probably something to do with the radius/threshold settings that I have not understood properly) and some of the color went crackers on me. There even seems to be some tonal reversal on the stone on the left. And where did all those blue stones come from? Oddly, given the promise of 32 bit blending, there remains considerable high and low clipping present in most of the images I have made tonight. Yech! But I will soldier on until I figure this out too. Suggestions and advice are welcomed! Listening to Ornette Colman, Sound Grammar, in preparation for hearing the man himself in Burlington this Saturday.
Posted by John Hughes Archived under: Color	Permalink \| Comment (4)