Object depth information acquisition method on basis of single-frame compound template

The invention discloses an object depth information acquisition method on the basis of a single-frame compound template and overcomes the defect of long consumed time of an existing time encoding mode. The object depth information acquisition method comprises the following implementing steps: 1, designing the single-frame compound template P; 2, utilizing the single-frame compound template to obtain a deformed image I; 3, demodulating from the deformed image I to obtain two frames of period co-prime square wave templates I1' and I'2; 4, calculating truncation phases Phi1 and Phi2 of each pixel point in the two frames of square wave templates by a Gabor filter; 5, by the truncation phases Phi1 and Phi2, solving a truncation phase development value phi; 6, solving a matched point (x, y) of a pixel point (x', y') in the deformed image I in the single-frame compound template P by phi; 7, according to a geometrical relationship of the pixel point and the matched point, solving a depth information value of an object to be measured. According to the invention, depth information acquiring speed of the object is increased, and depth information acquiring accuracy of the object is improved; the object depth information acquisition method can be used for industrial monitoring, medical science, human-computer interaction and 3D (three-dimensional) printing scenes.