1. An image processing apparatus comprising: a recognition unit that performs character recognition on an image including at least one character and that obtains a score indicating a recognition accuracy of at least one character region extracted through the character recognition; a local blurring-degree computation unit that computes a first degree of blurring of the at least one character region; and a blurring-degree computation unit that computes a second degree of blurring of the image by using the score and the first degree of blurring of the at least one character region.