Hi all,
I'm working on putting together a transfer function for Platinum & Palladium. I'm using a digitally printed step tablet containing steps representing values from 0% to 100%. I've printed the step tablet and taken values using a densitometer and I've created a curve using Ralph Lambrecht's technique explained in Way Beyond Monochrome 2. I'd spoken with Ralph a few years ago and we were able to get this to work for a different project but I'm running into some issues unique to the current version of Photoshop that I'm using. CS6 no longer has the option to input a transfer function within the print dialog box. This is the only space I was aware of that allowed 0-100% values to be input. When inputing the values into a typical curve, the 0-100% values don't match with the 255 values of an 8-bit image. I'm wondering if anyone can provide the equivalent 0 – 255 8-bit luminance code values for the 0-100% steps of the step tablet? I think this should allow me to convert the values into a proper curve that could be applied before printing which would have the same effect as the transfer function with values from 0-100%.
As an aside, I'm well aware that there are many other methods of producing a digital negative. My question is specific to the issue described above so offering countless alternatives and not touching on the original question is not entirely helpful so lets please try to stay on topic if possible.
Any help/insight here would be hugely appreciated!
P.S. I'm re-downloading CS4 in case it is the only option that I end up with (to get back the ability to enter transfer function directly).
I'm working on putting together a transfer function for Platinum & Palladium. I'm using a digitally printed step tablet containing steps representing values from 0% to 100%. I've printed the step tablet and taken values using a densitometer and I've created a curve using Ralph Lambrecht's technique explained in Way Beyond Monochrome 2. I'd spoken with Ralph a few years ago and we were able to get this to work for a different project but I'm running into some issues unique to the current version of Photoshop that I'm using. CS6 no longer has the option to input a transfer function within the print dialog box. This is the only space I was aware of that allowed 0-100% values to be input. When inputing the values into a typical curve, the 0-100% values don't match with the 255 values of an 8-bit image. I'm wondering if anyone can provide the equivalent 0 – 255 8-bit luminance code values for the 0-100% steps of the step tablet? I think this should allow me to convert the values into a proper curve that could be applied before printing which would have the same effect as the transfer function with values from 0-100%.
As an aside, I'm well aware that there are many other methods of producing a digital negative. My question is specific to the issue described above so offering countless alternatives and not touching on the original question is not entirely helpful so lets please try to stay on topic if possible.
Any help/insight here would be hugely appreciated!
P.S. I'm re-downloading CS4 in case it is the only option that I end up with (to get back the ability to enter transfer function directly).
