: Increasing DPI for image reduction I have an image that is 66x50 inch and 72 dpi, which looks great on any monitor because it's huge, but I actually have to reduce the image size to print

@Si6392903

The 300 ppi is recomended for comercial printing with an output of 150 lpi. So the first question is: Are you using the file for comercial printing, for example a calendar or something?

If the answer is no, then don't be scared of using diferent resolutions than 300 ppi, like printing a poster on a plotter for hanging on the wall of your home.

So 4752x3600 px is a decent image. At 44 inches will give you a 108 ppi resolution. You won't see thoose pixels at 50 cm. But you still can improve that resolution a bit.

In my opinion you should only resample an image by an exact multipyer. In this case 200% using Bicubic sharper (In Photoshop)

This will give you a very good resolution of 216 ppi. This resolution is fine for that size.

Vote Up Vote Down

@Reiling762

Your image isn't big enough to boost the dpi from 72 to 300, at least not at your required size of 44 inches.

Taking a 66x50 in image at 72 dpi, and wanting to print it at 300 dpi means the largest the image can be is 15.84x12 in

At 44 inches in width, your image would be 33.3 in in height and have a dpi of 108, which is certainly an improvement over 72 dpi but nowhere near the desired 300 dpi.

And as Jongware mentioned you need to figure what the purpose of the print will be and from how far it will be viewed from. Maybe you won't even need 300 dpi.

An easy way to figure these numbers out is to open your image in Photoshop and then going to Image > Image Size... and then unchecking the Resample checkbox. You can then adjust the dimensions and resolution and the other numbers will adjust to match.

Here's what it looks like:

Vote Up Vote Down