1. An image processing method for a digital camera, comprising: sensing an image; performing an eye-gazing detection process on the image to detect an eye-gazing direction of at least one eye of at least one object in the image; determining whether the eye-gazing direction meets a gazing criterion, wherein the gazing criterion defines a specific angle of the eye-gazing direction of the at least one eye of the at least one object with respect to the digital camera, and wherein the eye-gazing direction is determined by analyzing pupils of the at least one eye; and triggering an application of the digital camera if the eye-gazing direction meets the gazing criterion.