how to increase resolution for an image in mac

Now my image will print larger, but the quality will be much lower. What happens if we decrease our resolution?Īs you may have guessed, our Width and Height doubled when we halved our Resolutions. However, note that the Width and Height decreased by half when the Resolutions doubled. This means that in order to print at 600ppi and retain full-quality, I can print this image only as large as 5' x 3.33'. Remember that the number of pixels in the image have stayed the same because we did not add or subtract any pixels to the image, only determined how many of those pixels to display per inch. I wanted to print this image in a professional publication and the image needed to be at least 600ppi. In this example, we had an image with a 300ppi resolution.

This is because GIMP is changing only the resolution of the image and not adding any additional pixels (which is what happens when an image is resized). To change resolution we are NOT changing the number of pixels in the photo, but changing only how many of those pixels will be displayed per inch.Ĭ ongratulations! You have successfully changed the resolution of an image!

You will notice that when you type a value into the Resolution field, the values of the document's width and height also change. In the X and Y Resolution fields, type in your desired resolution. If Print Size Width and Heights are not shown as inches, select the dropdown beside Height and select 'in'.Ĥ. A Set Image Print Resolution dialog box will appear like the one pictured below. Tip: You may right-click and save the tiger image below to use it as a practice image.ģ. With GIMP open, go to File > Open and select an image Image editing programs like GIMP (GNU Image Manipulation Program) can give you resolution information and allow you to change the resolution of an image. One would change the resolution of an image particularly for printing purposes, because the quality of the print is dependent on the resolution of the image.ġ. How to Change Image Resolution Using GIMP

How to increase resolution for an image in mac