Gas leak detection device, gas leak detection method, and gas leak detection program

A gas leak detection method comprising:

• a step of acquiring a plurality of pieces of image data obtained by imaging a field in chronological order;
• a step of evaluating a luminance change for each pixel included in the image data by comparing a luminance of each pixel between two pieces of the image data before and after each other in chronological order among the plurality of pieces of image data;
• a step of calculating a luminance change frequency distribution in the image data by integrating the luminance change for each pixel;
• and
• a step of detecting a gas leaking in the field based on the luminance change frequency distribution.

A non-transitory computer-readable medium including instructions that cause a computer device to execute:

• a step of acquiring a plurality of pieces of image data obtained by imaging a field in chronological order;
• a step of evaluating a luminance change for each pixel included in the image data by comparing a luminance of each pixel between two pieces of the image data before and after each other in chronological order among the plurality of pieces of image data;
• a step of calculating a luminance change frequency distribution in the image data by integrating the luminance change for each pixel;
• and
• a step of detecting a gas leaking in the field based on the luminance change frequency distribution.