Measuring instrument, measuring method, and computer-readable storage medium

A measuring method comprising:

• a step of acquiring a moving image by performing image capturing on the living organism;
• a step of calculating, from each of images constituting the moving image, a representative value of pixel values of pixels in a target region containing an optical image of the living organism;
• and
• a step of specifying an exposure time and a sensitivity based on an optimal frame rate and the representative value so that the representative value falls within a prescribed range, wherein
• in the step of acquiring the moving image, the image capturing is performed on the living organism with the optimal frame rate, the exposure time, and the sensitivity.

A computer-readable storage medium containing a program configured to cause a computer to perform:

• a function of acquiring a moving image by performing image capturing on a living organism;
• a function of calculating, from each of images constituting the moving image, a representative value of pixel values of pixels in a target region containing an optical image of the living organism;
• a function of specifying an exposure time and a sensitivity based on an optimal frame rate and the representative value so that the representative value falls within a prescribed range;
• and
• a function of calculating a pulse wave signal from a temporal change in the representative value, wherein
• in the function of acquiring the moving image, the image capturing is performed on the living organism with the optimal frame rate, the exposure time, and the sensitivity.