We do some process on images that customers send us on a regular basis. They scan the documents with their own scanners and software. Our only requirements are that the images must be scanned with minimum of 200 DPI.
We are now dealing with a new customer, the TIFF images we received from him are 100 DPI. I just spoke with him and he told me that their scanning software has an option to change the image resolution, he change it to 200, the image size has increased but the tag still remains on 100 DPI. Also when I right click the image and select properties, the resolution remains 100.
My question is:
We are developing in .Net, is there a way to know the true resolution without looking the image tag or image property? The solution we are looking for is either by .net programming or a utility that will show us the true resolution.
I tried to use irfanview to check the resolution but it shows the same info that I wrote above, just like property window of the image (Shows only the the resolution written in the tag)
Sorry for the long story, just wanted to avoid misunderstanding :)
Thank you in advance