A method of evaluating image quality includes capturing a first digital image of a target object using a first digital camera of a smart device. A second digital image of a user of the smart device is captured using a second digital camera of the smart device. The second digital image includes an image of the user's facial expression. A quality index is generated for the first digital image by analyzing one or more features of the second digital image. Analyzing the second digital image includes determining the user's sentiment. The quality index is then associated with the first digital image.