Re: curves and gum and Christopher James book
An easy way to compare a curve applied to a positive vs a curve applied to a negative is to do the following: 1. Take a 21 step digital step tablet 2. Apply your curve to the step tablet 3. Flatten the layers 4. Use Image>Adjustments>Invert 5. Read the values of the steps with the eyedropper tool 6. Create a curve with points that have the output values set to the values you read for each step Hope this helps! Mark Nelson Precision Digital Negatives PDNPrint : Precision Digital Negatives Mark I. Nelson Photography In a message dated 3/10/08 8:51:30 PM, cryberg@comcast.net writes: Folks: Several of you have responed to Henry's question with suggestions of what he might do--but that was not his question. He wants to know--and I do too--how one person's curve for a positive can look much like another's curve for a negative. One answer seems to respond to his question, but I don't understand it--here it is: You have to REALLY pay attention to the curve mode being used to display the curve. A curve calculated for graphic mode (applied to a positive) will, on the surface, look exactly the same as a curve applied to a negative -- BUT since PDN users generally work in binary mode it is this change of mode which functions to invert the curve. What is a curve calculated for graphic mode? Why will it look exactly the same a a curve applied to a negative. What is binary mode as opposed to graphic mode? ************** It's Tax Time! Get tips, forms, and advice on AOL Money & Finance. (http://money.aol.com/tax?NCID=aolprf00030000000001) |