Image File Help

Preparing and Editing Your Image

If you follow these simple image file help guidelines, you should get great results from your Art Warehouse prints.


Resolution, File Size & Color

  • Image resolution should be at least 150 dpi.
  • Please convert all colors to sRGB or Adobe1998 color space to avoid any color shift that can occur during the production process. We will print your file in either color space in which you submit to us. As for all you photographers using the newest ProPhoto color space, current technology does not support printing that color space. So convert to Adobe1998 and then submit your file.
  • Most current digital cameras can produce a big enough file for enlargement to even the biggest sizes listed. We accept file sizes up to 50mb on our site. If you require upload of larger size file, please share a folder with us via DropBox .


Editing Your Photo

We work in a color corrected environment. Your image will appear brighter on your monitor than what will actually print out. To get a closer idea of what your print will look like, and before you edit your file, reduce the brightness of your monitor down about 30%, then edit your file. This will be a closer representation of what your print will look like when printed. We do prepare each image before it is printed and based on what media type is selected. This will ensure that it will look its best when printed.

File Types Accepted

We accept the following file types: JPG, TIFF, PDF.

The upload tool will calculate your uploaded file and determine if it is of sufficient quality for printing and at what size it can be printed without losing quality. If your file is not of sufficient quality, then the upload engine will notify you. It will also limit the sizes available based on image quality and pixel dimensions.


Image Crop – Aspect Ratio

Most of the current digital cameras have sensors that are not equal to the framing industry sizes. To avoid having the image arbitrarily clipped by our photo printing service, you should crop the photo to the correct aspect ratio, prior to selecting the print size.

Aspect ratio is the relationship of an image’s width to height, or its proportions. Digital cameras produce files with an aspect ratio of 4:3. But many common photo print sizes have a different aspect ratio. For example, a 4 by 6 print has an aspect ratio of 3:2; an 8 by 10 has an aspect ratio of 5:4.

After uploading your image, you can choose the edit button and check the ratio and crop to desired size. The online crop tool will maintain the ratio and display the crop box based on the size you select.

Understanding aspect ratios can introduce confusion, but it can really be explained quite easy. We all had to do basic fractions in middle school. If you can remember how to factor fractions, then you can figure out aspect ratios. Basically you can use fractions and look at your photo size as a fraction. Width and height become x/y. Factor your width and height to the lowest common denominator and you will have your aspect ratio. Then to calculate a new size, multiply or divide the numerator and the denominator equally.

For example, if you have a photo that is standard-out-of-the-camera without any cropping made to it, it has a ratio of 4:3, or in framing/printing world jargon, an 8×12. Now determine what size you want printed and find the ratio which will match the original aspect ratio, or crop the image to match the aspect ratio you are wanting in the print.

Some examples of relationship of sizes (or ratios) are:

  • 8×10 = 16×20, 24×30, 32×40 – This is 4:5 ratio
  • 8×12 = 12×18, 20×30, 24×36 – This is 3:4 ratio

There are numerous calculators out on the web to help determine aspect ratio (if you are like us and can’t do math in our heads…).

If you are unsure of how to crop your image for the correct size print, contact us.


Info Question? Don’t be afraid, we have probably had it asked before. Go ahead and email us!