How to Check the Image Resolution

This article will provide you with a step-by-step instruction on how to check the resolution of an image.

Why is this important?

Image resolution is crucial for print quality. DPI (dots per inch) refers to the number of dots that can be placed in a one-inch line, and higher DPI means more detail and clarity. In a printed book, low-resolution images can appear pixelated or blurry, making the book look unprofessional and difficult to read. By ensuring that your images are at least 300 DPI, you ensure that they will look sharp and clear when printed, enhancing the overall quality and readability of your book.

To ensure high-quality images, all images that will go into your book will need to be sent individually, rather than included in your manuscript. You may submit your images or illustrations in the following file formats:

  • JPEG
  • TIFF
  • PNG
  • PSD
  • PDF
  • INDD

Here’s how to check the resolution of an image: 

  • Step one: When you find your image, don't open it. Instead, right click on the photo and select “Properties.”

  • Step two: Once you're in “Properties,” click on the “Details” tab.
  • Step three: Scroll until you see the resolution or dpi of your picture.

Replace or Resize Images:

  • For images with a resolution significantly below 300 DPI, consider replacing them with higher-resolution versions if possible.
  • If you cannot find higher-resolution versions, you may need to resize the image, but be cautious as this can lead to quality loss.
  • To resize an image while maintaining quality, use a software like Photoshop or GIMP and select "Resample Image" to change the dimensions while keeping the DPI at 300.