Epson V700 as Densitometer

[Valerio Trigari]

Hello,

has anyone ever attempted to use the Epson Perfection V700 as a densitometer. I found a couple of interesting articles on the web, but they were more theoretical than practical. Any suggestion is more than welcome!

Cheers,

Val

[numnutz]

Vuescan software has a density function for transmission and reflection - I don't know how you can calibrate it though...

nn

[Valerio Trigari]

Thanks, I'll have a look to Vuescan software.

[banana_legs]

Val,

Scan a Stouffer transmission step-wedge at the same time as the negative (or positive if you have a reflective step wedge). Find the pixel value of the region of interest on the negative, then find the step on the step-wedge which has the nearest value to the measured pixel. The process will then allow you to quantify the density based on your reference and it does not matter how linear the scanner is. The approach also means that for comparing very dark areas, you can pull the gamma slider in the levels adjustment across quite dramatically and still get good readings as whatever happens to your image will also happen to the image of the step-wedge.

Best regards,

Evan

[Valerio Trigari]

Thanks banana_legs! That sounds a very simple procedure to get negative densities.