Image recording method, image recording program, data processing apparatus, and image recording apparatus

A computer readable storage medium storing an image recording program causing a computer to execute:

• a procedure for acquiring, from a plurality of cameras, respective video images which the plurality of cameras start capturing in the sea before a first light that is lit in a first color is turned on and end capturing after a second light that is lit in a second color is turned on after the first light is turned on;
• a procedure for detecting, for each of the video images, a difference in luminance between chronologically adjacent frames in the video image;
• a procedure for associating times of frames between the video images on the basis of the difference;
• and
• a procedure for recording the video images with the associated times in a recording medium.

An image processing apparatus comprising:

• an acquirer configured to acquire, from a plurality of cameras, respective video images which the plurality of cameras start capturing in the sea before a first light that is lit in a first color is turned on and end capturing after a second light that is lit in a second color is turned on after the first light is turned on;
• a detector configured to detect, for each of the video images, a difference in luminance between chronologically adjacent frames in the video image;
• a linker configured to associate times of frames between the video images on the basis of the difference;
• and
• a controller configured to record the video images with the associated times in a recording medium.

An image recording apparatus comprising:

• a camera unit configured to image a subject in the sea;
• a first light unit having a first light that is lit in a first color;
• a storage configured to store an image generated by the camera unit;
• a controller configured to turn on the first light after the camera unit starts imaging;
• and
• a second light unit having a second light that is lit in a second color,
• wherein the controller is configured to turn on the second light after a predetermined time elapses from turning on of the first light unit.