Control method, depth camera and electronic device

A depth camera, comprising an imager and a laser projection module, wherein the laser projection module comprises a plurality of point light sources, the plurality of point light sources are grouped to form a plurality of light-emitting arrays, and the plurality of light-emitting arrays are controlled independently;

• the depth camera further comprises a processor, the processor is configured to:
• obtain a current distance between the laser projection module and a user;
• determine a target number of light-emitting arrays from the plurality of light-emitting arrays according to the current distance;
• and
• activate the point light sources in the target number of light-emitting arrays;
• wherein in response to determining that the current distance is within a first distance range, activate the point light sources in a first target number of light-emitting arrays from the plurality of light-emitting arrays;
• wherein in response to determining that the current distance is within a second distance range, activate the point light sources in a second target number of light-emitting arrays from the plurality of light-emitting arrays;
• wherein in response to determining that the current distance is within a third distance range, activate the point light sources in a third target number of light-emitting arrays from the plurality of light-emitting arrays;
• and
• wherein the second distance range is between the first distance range and the third distance range, and the second target number is greater than the first target number and is less than the third target number.

An electronic device, comprising:

• a housing;
• and
• a depth camera, disposed in the housing and exposed from the housing to obtain a depth image;
• wherein the depth camera comprises an imager and a laser projection module, the laser projection module comprises a plurality of point light sources, the plurality of point light sources are grouped to form a plurality of light-emitting arrays, and the plurality of light-emitting arrays are controlled independently;
• the depth camera further comprises a processor, the processor is configured to:
• obtain a current distance between the laser projection module and a user;
• determine a target number of light-emitting arrays from the plurality of light-emitting arrays according to the current distance;
• and
• activate the point light sources in the target number of light-emitting arrays;
• wherein determining the target number of light-emitting arrays and activating the point light sources comprises:
• in response to determining that the current distance is within a first distance range, activating the point light sources in a first target number of light-emitting arrays from the plurality of light-emitting arrays;
• in response to determining that the current distance is within a second distance range, activating the point light sources in a second target number of light-emitting arrays from the plurality of light-emitting arrays;
• and
• in response to determining that the current distance is within a third distance range, activating the point light sources in a third target number of light-emitting arrays from the plurality of light-emitting arrays;
• wherein the second distance range is between the first distance range and the third distance range;
• and the second target number is greater than the first target number and is less than the third target number.