Three-dimensional scanner and three-dimensional scanning method

A three-dimensional scanner, comprising:

• an image projection device (10), configured to respectively project, in each predetermined period, a predetermined stripe pattern corresponding to the predetermined period onto a target object, wherein stripes of each predetermined stripe pattern are disposed according to arrangement of predetermined color-coded stripes, each predetermined stripe pattern comprises stripes of at least one color in the predetermined color-coded stripes, a plurality of predetermined stripe patterns comprise stripes of at least two colors in the predetermined color-coded stripes, and the stripes in the predetermined stripe patterns are arranged in the same way as stripes of the same color in the predetermined color-coded stripes;
• and
• an image acquisition device (20), configured to acquire light modulated by the target object so as to obtain a plurality of stripe images when predetermined stripe patterns are projected onto the target object, wherein the obtained stripe images are taken as coding images to determine respective stripe sequences and as reconstruction images to perform three-dimensional reconstruction on the target object;
• wherein the image acquisition device (20) further comprises a plurality of cameras (21), the plurality of cameras (21) comprising at least one monochrome camera, wherein the image acquisition device (20) acquires the light modulated by the target object through the plurality of cameras (21) to obtain a plurality of stripe images, a stripe image obtained by the at least one monochrome camera is taken as a reconstruction image to perform three-dimensional reconstruction on the target object;
• and stripe images obtained by at least a plurality of monochrome cameras are taken as coding images to determine respective stripe sequences, and/or, a stripe image obtained by at least one color camera is taken as a coding image to determine respective stripe sequences.