Object detection apparatus, learning apparatus, learning method, object detection program, and storage medium

A lesion detection method comprising:

• acquiring one or more images captured by endoscopic examination, the one or more images including a first image;
• calculating a first map from the first image with use of a first model;
• detecting a lesion with reference to at least the first map;
• determining whether a second image that is captured by a past endoscopic examination is present, the second image indicating the same place of a same subject as the first image, wherein no lesion is detected from the second image,
• in a case where the second image is present, calculating, with use of a second model, a second map from the second image or from both the first image and the second image;
• in a case where the second image is present, detecting the lesion with reference to both the first map and the second map;
• and
• displaying a detection result of the lesion to an output device.

A non-transitory tangible computer-readable storage medium storing therein a lesion detection program causing a computer to execute the processing comprising:

• acquiring one or more images captured by endoscopic examination, the one or more images including a first image;
• calculating a first map from the first image with use of a first model;
• detecting a lesion with reference to at least the first map;
• determining whether a second image that is captured by a past endoscopic examination is present, the second image indicating the same place of a same subject as the first image, wherein no lesion is detected from the second image;
• in a case where the second image is present, calculating, with use of a second model, a second map from the second image or from both the first image and the second image;
• in a case where the second image is present, detecting the lesion with reference to both the first map and the second map;
• and
• displaying a detection result of the lesion to an output device.