Dear list, I have been messing around using the bicubic interpolation photoshop on files from my d100.
I process them as 16bit raw files from bibble. I am interpolating at 125% in four steps. So the file I end up with is roughly a 205mb 16 bit file at at 12 bit is 102mb. I am using unsharp masking at 100% four times with 1 radius and no threshold. I am resizing my image to 72dpi then using the view print size function in the zoom tool to approximate the print size on screen. I interpolate in 16 bit to retain as much tonal info as possible. I only tried this as I remembered someone on the list saying that anything that looked good at 100% on screen would print well. I also created a duplicate image as an original 18mb file and to compare the two. The other one is risized to the same physical dimensions as the interpolated one. Then using the view print size compared the two. My observation is that you get the jaggies of the pixels visible, but the interpolated one looks better. I know I havent got a back producing large 120mb files d100 is all I have. My question is, is this method a good way of going around it. The print indicated it would now be 260cm high at 72dpi. Now I now normally you would submit most files at 300dpi. Would I have to change this figure???. I am only asking this as a customer was asking about blowing up really big and I said it would be fine to about A0. Um well being the viewing distance is going to be way back, is this an issue. I know that those with an s2 can go just that bit farther, and I suppose it depends on what kind of media its going to be printed on. With the on screen approximation I would say it looks fine from about 2 meters away. I did here someone on the list saying that they had an s1 file printed onto a 72 sheet poster with no worries. Guidance would be greatlyfully receieved to plug this knowledge gap with some ammo, and condfidence. cheers Ian Reynolds =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
