My question is about croping photos. When croping using photoshop cs2 or any other program how do you know how much croping you can do and still make 8x10 or 4x6. Let me explain ( examples sizes only) If I have a digital file that is 3456 x 2592 and I crop from it what size should I try to crop to for display on screen and also for printing or does this not matter
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Display on screen is generally managed by image viewers, so the original size may be maintained.
For web publishing:
1. Transform image color space into sRGB, if different
2. Resample the image to an 800x600 format, or so. Cropping is not required
3. Save the image in jpg format good quality
For printing, cropping and resampling may be required depending on paper format. If you do not printer drivers do it.
If you use a your own printer, PPI and printable area are informations to pick up from driver.
Go to [a href=\"http://www.photoresampling.com/index_eng.php]http://www.photoresampling.com/index_eng.php[/url] and download the free PrinterData application.
As you set the preferences at driver level (format, quality, borderless), PrinterData is able to expose PPI, printable area and margins.
If you use a lab, ask for the correct dimensions (4x6, 8x10…. are approximated values) and for the required PPI.
On the same site you find an artiche on PPI/DPI and you can download a demo version of PhotoResampling. A PhotoResampling tool can prepare images for printing (cropping and resampling).
Jacopo