I have a picture that is 1536x2048 pixels and has a resolution of 150 dpi. I need to enlarge it so that the person to whom I am selling the photo can display it in the manner of her choice. What is the largest size that I could make this photo without it looking grainy?
2007-01-11 17:02:38 · 3 answers · asked by Rat 7 in Arts & Humanities ➔ Visual Arts ➔ Photography
11X14 with a little tweeking from photoshop elements
2007-01-11 17:16:00 · answer #1 · answered by queen_of_aksum 2 · 1⤊ 0⤋
Keep in mind that the DPI is meaningless until you *print* the image. As long as it's just on the computer, it's simply 1536x2048 pixels. How big it appears on the computer screen depends on how big the computer screen is, and what its resolution is, NOT the DPI.
If you use a good photo editing program (Photoshop CS or elements, PaintShop Pro, etc.) you could do a bi-linear interpolated enlargement to 2X -- 3072 x 4096 -- without seeing much degradation at all. Sharpen it just a little afterwards, and at normal viewing distances nobody will ever notice. A 4X enlargement probably won't look very good that way, but if you spring for some really good specialized software (like Genuine Fractals), you could possibly go as much as 8X above normal (depends on the image quality to start with, the noise levels, etc.). At a 2X enlargement, and printing at 300 DPI, that would be about a 10" by 11.5" print...and it would look just fine.
2007-01-12 01:09:54 · answer #2 · answered by Anonymous · 1⤊ 0⤋
Just do the math.
1535 divided by 150 = 10.23
2048 divided by 150 = 13.6
You could maybe push this to 11x14 without making it much worse than it is already at 150 dpi. I shoot for a minimum of 200 dpi and really prefer 300 dpi for excellent quality.
2007-01-12 01:11:33 · answer #3 · answered by Jess 5 · 1⤊ 0⤋