Hello QuickMTF Users . .
I use QuickMTF Light V1.14 and don't fully understand two settings:
A checkbox allows selection to display "peak MTF", e.g. MTF50P
instead of MTF50. The graph changes only slightly between the two. While I understand the difference in MTF values obtained from bar and sine-wave targets, what is this "peak" number actually telling us? (bearing in mind that the target is a slant edge, i.e. it is neither a bar pattern nor is it a sine-wave).
A field allows entry of various numbers for "gamma" but I am not certain that it is referring to the gamma as in e.g. the linear to sRGB conversion. Again, the graph changes only slightly with widely different values. I glanced at Imatest's stuff and didn't find a clear answer there, although they do mention a similar type of selection. So, if I analyze a standard JPEG file, do I put 1
? 2.2? 1.8?
Is a TIFF or a PNG any different as far as QuickMTF is concerned?
I asked the author about the correct gamma setting for a TIFF file but he didn't seem to understand my question because the answer was written in "terse" and made no sense no me
Old and confused and not liking it . . .