Measure test prints with digital camera
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I've been reading about using QTR to make a DN for darkroom?prints (silver gelatin). After making the test print (or step wedge), it appears that a flatbed scanner can be used to scan the print and measure the resulting digital file with Photoshop. We don't have access to a proper densitometer or other spectrometer devices.
Has anyone tried using a digital camera (DSLR or mirrorless) to?take a picture of the test print and measure the file in PS? As long as there is a maximum black patch and white patch, it seems these act as an internal standard for the image file. This could be used to compensate for exposure and lighting.
I'm sure someone has done this before - I just can't find any mention of this. Any advice would be appreciated!
Thanks, RC Wieboldt
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