Image analysis apparatus, image analysis method and program recording medium

An image analysis method, which is performed by a computer, comprising:

• sequentially obtaining a plurality of image frames that constitute moving image data;
• analyzing the plurality of image frames by using a first image analysis model;
• analyzing the plurality of image frames by using a second image analysis model, a processing speed of the second image analysis model is higher than that of the first image analysis model, an analysis accuracy of the second image analysis model is lower than that of the first image analysis model, the second image analysis model is allowed to be updated by using a result of an analysis performed by using the first image analysis model;
• storing in a storage unit a plurality of analyzed frames, which are image frames of the plurality of image frames that are already analyzed by using the first and second image analysis models, in association with an evaluation value for evaluating a result of an analysis performed by using the second image analysis model on the analyzed frames;
• extracting at least one analyzed frame that satisfies a predetermined extraction condition based on the evaluation value, from the plurality of analyzed frames stored in the storage unit;
• and
• updating the second image analysis model by using a result of an analysis performed by using the first image analysis model on the extracted analyzed frame and a result of an analysis performed by using the first image analysis model on a new frame that is a newly obtained image frame of the plurality of image frames.

A non-transitory program recording medium on which a computer program for allowing a computer to execute an image analysis method is recorded,

• the image analysis method including:
• sequentially obtaining a plurality of image frames that constitute moving image data;
• analyzing the plurality of image frames by using a first image analysis model;
• analyzing the plurality of image frames by using a second image analysis model, a processing speed of the second image analysis model is higher than that of the first image analysis model, an analysis accuracy of the second image analysis model is lower than that of the first image analysis model, the second image analysis model is allowed to be updated by using a result of an analysis performed by using the first image analysis model;
• storing in a storage unit a plurality of analyzed frames, which are image frames of the plurality of image frames that are already analyzed by using the first and second image analysis models, in association with an evaluation value for evaluating a result of an analysis performed by using the second image analysis model on the analyzed frames;
• extracting at least one analyzed frame that satisfies a predetermined extraction condition based on the evaluation value, from the plurality of analyzed frames stored in the storage unit;
• and
• updating the second image analysis model by using a result of an analysis performed by using the first image analysis model on the extracted analyzed frame and a result of an analysis performed by using the first image analysis model on a new frame that is a newly obtained image frame of the plurality of image frames.