I have a user asking about the recommended DPI settings for PNG files for printing. the png is loaded into a datawindow using either the bitmap() function in a compute or the display as picture on a column. The datawindow is then printed to a laser printer.
I sort of assume the higher DPI the better, but the file would just be bigger? Anyone have any idea on this?
I did quite a few consulting stints at Passport Canada before joining Appeon. The Passport PB App captures your passport photo by directly interacting with either a scanner or a camera at the counter. The image has to be a certain minimum DPI - however the camera and scanner devices can record an image in very high resolution. The key we found was to pick a resolution that met minimum printing density required for the Passport without burdening the ASE DB size where the images were stored as Blobs. The happy middle ground that we found was a JPEG image format using a 25% (max) compression to save DB space yet maintain a good image quality for the Passport Book itself (all done via PB code).
So my suggestion would be to try different image DPI's and file formats that best work for your App(s) that meet your clarity and image size needs.
HTH
Regards ... Chris