Image processing device, image processing method and recording medium

An image processing method comprising:

• acquiring a moving image and a plurality of still images, with an image acquiring section;
• extracting characteristic information from the plurality of still images, with a characteristic information extractor;
• setting a first image analysis condition for one portion of the moving image to be rougher than a second image analysis condition for another portion of the moving image based on the characteristic information, the first image analysis condition being a first frequency of extracting frame images or a first number of items of image analysis, and the second image analysis condition being a second frequency of extracting frame images or a second number of items of the image analysis, with an image analysis condition determiner;
• extracting frame images from the one portion of the moving image in accordance with the first frequency of extracting frame images, extracting frame images from the another portion of the moving image in accordance with the second frequency of extracting frame images and performing the image analysis on the extracted frame images, or extracting frame images from the moving image, performing the image analysis on the extracted frame images from the one portion of the moving image in accordance with the first number of items of the image analysis and performing the image analysis on the extracted frame images from the another portion of the moving image in accordance with the second number of items of the image analysis, with a frame image analyzer;
• and
• calculating an evaluation value of each of the frame images based on a result of the image analysis and outputting, of the frame images, a frame image having an evaluation value not less than a first threshold value, with a frame image output section.

An image processing device comprising a computer or hardware, wherein the computer or the hardware comprises:

• an image acquiring processor that acquires a moving image and a plurality of still images;
• a characteristic information extracting processor that extracts characteristic information from the plurality of still images;
• an image analysis condition determining processor that sets a first image analysis condition for one portion of the moving image to be rougher than a second image analysis condition for another portion of the moving image based on the characteristic information, the first image analysis condition being a first frequency of extracting frame images or a first number of items of image analysis, and the second image analysis condition being a second frequency of extracting frame images or a second number of items of the image analysis;
• a frame image analyzing processor that extracts frame images from the one portion of the moving image in accordance with the first frequency of extracting frame images, extracts frame images from the another portion of the moving image in accordance with the second frequency of extracting frame images and performs the image analysis on the extracted frame images, or extracts frame images from the moving image, performs the image analysis on the extracted frame images from the one portion of the moving image in accordance with the first number of items of the image analysis and performs the image analysis on the extracted frame images from the another portion of the moving image in accordance with the second number of items of the image analysis;
• and
• a frame image outputting processor that calculates an evaluation value of each of the frame images based on a result of the image analysis and outputs, of the frame images, a frame image having an evaluation value not less than a first threshold value.