Some applications do read this metadata so it can be important, (for example when importing PNGs into Flash–for some crazy reason) but most do not.You can increase the DPI of an image with Let’s Enhance, Photoshop, GIMP, and free online converters. So you haven’t changed the file at all, just the metadata that says what size to print the image. It does not matter if “resample image” is checked or not, as the image is not being resized. Now the top should say “Pixel Dimensions: 1.4 MB” –the exact same file size it was when you opened it. Just erase the new Width, and type the very first Width you saw in the box. You will also notice that that under Pixel Dimensions the Width and Height have changed. You will notice the top of the dialogue box says something like “Pixel dimensions: 38 KB (was 1.4 MB).” This is because Photoshop is planning to throw away extra pixel information to match the smaller print resolution, which is not what you want. Where it says “Resolution: 300 ” erase the 300 and type 72. Make sure “constrain proportions” is selected. Look where it says “Width:” under “Pixel Dimensions” (the very first number field in the dialogue box.) This shows how many pixels wide your image is. Let me know if I’m still not being clear and I’ll try to explain it a different way. I’m trying to write this so it makes sense, but I’m not sure if it’s worked yet. I guess my real question is if I’m scanning an image that is only 1″x1″, how to I scan it so I end up with something like 1200×1200 pixels at 72dpi and not 200×200 pixels at 2400dpi? (the math is probably way off, but you get the idea.

Otherwise, the extra dpi is useless because video is the equivalent of 72 dpi and I still only have an image that is 200×200 pixels. If I uncheck the resample box, does this work and not loose quality? So would the resulting image would be something like 400×400.

So my question is, can I use the extra dots per inch to scale the image without losing quality by setting the image to 72dpi and scaling the image. Because the image was so small, the resolution ended up only being something like 200 pixels x 200 pixels. I have a image that was scanned at 300dpi. “You can always change image size… and uncheck the resample box….

Photoshop 72 dpi how to change