System and method for measuring depth of stereoscopic image

A system for measuring a depth of a stereoscopic image, comprising:

• a display device displaying a stereoscopic image at a predetermined depth of field in a three-dimensional space, wherein the stereoscopic image has a plurality of depths in the three-dimensional space;
• a holographic camera generating an interference pattern image by sensing a wavelength and a phase of light of the stereoscopic image;
• and
• a control unit calculating a plurality of modulated image data having image information of the stereoscopic image at each depth of the plurality of depths based on the wavelength and the phase of the light, calculating edges of a field in each of the plurality of modulated image data to obtain edge detection values, calculating a modulated signal by arranging the edge detection values according to a depth in the each of the plurality of modulated image data, calculating a first maximum value of the modulated signal, and calculating a first depth corresponding to the first maximum value as the depth of field.