Image processing apparatus, operation method of image processing apparatus, operation program of image processing apparatus, and learning method

An operation method of an image processing apparatus, the method comprising:

• using a semantic segmentation model that has been trained using an annotation image in which a first pixel corresponding to at least one point corresponding to an object is set as a first pixel value and a second pixel other than the first pixel is set as a second pixel value different from the first pixel value, the semantic segmentation model having been trained by assigning a greater weight to the first pixel than to the second pixel to calculate a loss;
• inputting an analysis target image to the semantic segmentation model and outputting a feature amount map having a feature amount related to the at least one point corresponding to an object in the analysis target image from the semantic segmentation model;
• and
• identifying at least one point of an anatomical structure corresponding to the at least one point of the feature amount map based on the feature amount.

A non-transitory computer-readable storage medium storing an operation program of an image processing apparatus, the program causing a computer to execute a process comprising:

• using a semantic segmentation model that has been trained using an annotation image in which a first pixel corresponding to at least one point corresponding to an object is set as a first pixel value and a second pixel other than the first pixel is set as a second pixel value different from the first pixel value, the semantic segmentation model having been trained by assigning a greater weight to the first pixel than to the second pixel to calculate a loss;
• inputting an analysis target image to the semantic segmentation model and outputting a feature amount map having a feature amount related to the at least one point corresponding to an object in the analysis target image from the semantic segmentation model;
• and
• identifying at least one point of an anatomical structure corresponding to the at least one point of the feature amount map based on the feature amount.