Tuesday, February 17, 2009

click, click, click

TOO CONTRASTY :: Automatic ExposureTOO GREEN :: HDRi adaptive mapping with computed gamma 
Today was bright and sunny, so attempting to photograph the dappled light in the beech forest, on the Kepler track, gave a very contrasty result. The strong light is appealing but the shadows are dark and featureless and the spots of light burnt out. So I set my camera to bracketting, for two reason. Firstly it might give me a better ideas of the right EV adjustment (but judging this by comparing small images on the LCD screen outside is not really a reliable approach), Secondly it gave me the opportunity to post process the set of photos as a HDRi image (using the three exposures to get detail into the murky darks and/or washed out whites). I had plenty of card capacity (doing the three clicks at every photo soon eats up storage space if you are not careful) so most of my photographing in the forest was bracketted
manual adjustment To keep everything simple while I travel I just have picturenaut on a memory stick, so I have been relying on its fairly automatic tone mapping selection. However they were in my opinion changing the “greenness”. Ok, I know some parts of Lord of the Rings was filmed nearby but the green was just not what I had seen. The remedy lay in the gamma adjustment settings, I change that from computed gamma to none. Suddenly my forest photos was beautifully lit again without the artificial green glow.
JUST RIGHT :: HDRi adaptive tone mapping without computed gamma adjustment
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