What digital photo does an online Canadian citizenship application need?
One file from a commercial photographer, color if possible: a JPG or JPEG with minimal compression, at least 420 x 540 pixels, around 240 kB and never over 4 MB. It must be saved straight from the camera.
If the studio cannot give you a file, scanning or photographing their print is allowed, but IRCC calls a digital photo straight from the photographer the safer option.
Source: canada.ca