merging two curves in one new curve
Sometime curved digital negatives need some more finetuning. Whith a curvemaking tool like Chartthrob it is easy to run a second pass on an allready curved grayscale chart. But how to merge the second curve with the first in one in a new 'finetuned' curve? Recently I found a method in an article by Martin Evening that works very nicely. I wrote down the essentials here: http://polychrome.nl/weblog/curve-merging kees |