Bob Johns writes ... > ... I understand there is a formula that exists that takes into > consideration size of print, dpi etc that you can use to get > the file size you need. Is this correct and does anyone > know what that formula is and how it works?
It would be correct if you knew for a fact that absolutely no compression was applied when saving the file. This would be true only for TIFFs with compression disabled. Therefore, you'd not be able to trust the file sizes of JPEGs or PSD files. The only exception to this is the "bitmap size" as indicated (lower left) when you have the document open in Photoshop. This value could be used, and would be more accurate than the file size. However ... caution always applies. For example, independent of "file size" or "bitmap size", is the "image resolution" which defines the number of pixels per inch when the image is printed. In practical use, resolution (PPI), and size of print, is therefore independent of image size. Better than understanding the math you ask primarily about, is an understanding of pixel resolution, and how your printer interacts with the software. hth & cheerios ... shAf :o) Avalon Peninsula, Newfoundland <www.micro-investigations.com> =============================================================== GO TO http://www.prodig.org for ~ GUIDELINES ~ un/SUBSCRIBING ~ ITEMS for SALE
