3d depth image acquiring method and apparatus, and image acquisition device

A 3D depth image acquiring apparatus, characterized by being applicable to an image acquisition device comprising a VIS-NIR picture sensor and an infrared structured light projection component, the VIS-NIR picture sensor comprising a plurality of dot matrix units, and a blue light photosensitive component, a green light photosensitive component, a red light photosensitive component, and an NIR photosensitive component being distributed on each of the dot matrix units, wherein the apparatus comprises:

• an acquisition module configured for controlling the NIR photosensitive component and the infrared structured light projection component to operate so as to obtain a plurality of NIR images, and obtaining an optimum NIR image from the plurality of NIR images,
• wherein the acquisition module is further configured for controlling the blue light photosensitive component, the green light photosensitive component and the red light photosensitive component to operate so as to obtain a plurality of VIS images, and obtaining an optimum VIS image from the plurality of VIS images;
• a calculation module configured to perform calculation on the optimum NIR image by using a 3D depth mode to obtain a depth image;
• and
• a processing module configured to process the depth image and the optimum VIS image to obtain a 3D depth image.

An image acquisition device, characterized by comprising a VIS-NIR picture sensor and an infrared structured light projection component, wherein the VIS-NIR picture sensor comprises a plurality of dot matrix units, and each of the dot matrix units comprises a blue light photosensitive component, a green light photosensitive component, a red light photosensitive component, and an NIR photosensitive component;

• the infrared structured light projection component is configured to project infrared structured light to a surface of a to-be-photographed object;
• the VIS-NIR picture sensor is configured for controlling the NIR photosensitive component in each of the dot matrix units to operate to acquire infrared structured light reflected by the surface of the to-be-photographed object to obtain a plurality of NIR images, and determining an optimum NIR image from the plurality of NIR images, and controlling the blue light photosensitive component, the green light photosensitive component, and the red light photosensitive component of each of the dot matrix units to acquire visible light reflected by the surface of the to-be-photographed object, to obtain a plurality of VIS images, and determining an optimum VIS image from the plurality of VIS images;
• and
• the VIS-NIR picture sensor is further configured for performing calculation on the optimum NIR image by using a 3D depth mode to obtain a depth image, and processing the depth image and the optimum VIS image to obtain a 3D depth image.