Structure light depth sensing system and method using auxiliary time-of-flight sensing

A structure light depth sensing system using auxiliary time-of-flight sensing, comprising:

• a time-of-flight depth sensing circuit configured to perform a depth sensing operation on an object to generate a depth data corresponding to plural positions on a surface of the object, wherein the depth data comprises plural depth values corresponding to positions of the object;
• and
• a structure light depth sensing circuit configured to generate depth data corresponding to the positions on the surface of the object in accordance with the depth data of the time-of-flight depth sensing circuit, wherein the structure light depth sensing comprise a compensation circuit configured to perform:
• providing a plurality of similarity values in a predetermined search range, wherein the predetermined search range comprises a largest similarity value;
• calculating a compensation range in the predetermined search range in accordance with a target depth value of the depth data of the time-of-flight depth sensing circuit;
• calculating plural compensated similarity values in accordance with a weighting gain and the similarity values in the compensation range;
• and
• determining if a maximum value among the compensated similarity values is greater than the largest similarity value;
• wherein when the maximum value among the compensated similarity values is greater than the largest similarity value, the maximum value among the compensated similarity values is determined to be a correct similarity value, and the largest similarity value is determined to be a wrong similarity value.