Object detection device, object detection method, and program

An object detection device for detecting a target object from an image, the object detection device comprising a processor configured with a program to perform operations comprising:

• operation as a first detection unit configured to detect a plurality of candidate regions in which the target object exists from the image;
• operation as a region integration unit configured to determine one or more integrated regions based on the plurality of candidate regions detected by the first detection unit;
• operation as a selection unit configured to select at least a part of the one or more integrated regions;
• and
• operation as a second detection unit configured to detect the target object from the selected integrated region using a detection algorithm different from a detection algorithm used by the first detection unit.