Reading system, reading method, and storage medium

A reading system, comprising:

• a calculator calculating a total value of luminances in at least a portion of a second direction and fluctuation of the luminances in the at least a portion of the second direction at each of a plurality of points in a first direction for at least a portion of an image subjected to a polar transformation, a meter being imaged in the image, the meter including a pointer, a display panel, and a plurality of graduations, the pointer rotating around a rotation axis, the plurality of graduations being arranged along a circumferential direction around the rotation axis on the display panel, the polar transformation being referenced to a center of the meter, the first direction corresponding to the circumferential direction, the second direction corresponding to a diametrical direction from the center toward the graduations;
• and
• a determiner determining that the pointer exists at a position in the first direction where the total value has an extremum and the fluctuation is not more than a first threshold.

A processor, comprising circuitry,

• the circuitry being configured to
• calculate a total value of luminances in at least a portion of a second direction and fluctuation of the luminances in the at least a portion of the second direction at each of a plurality of points in a first direction for at least a portion of an image subjected to a polar transformation, a meter being imaged in the image, the meter including a pointer, a display panel, and a plurality of graduations, the pointer rotating around a rotation axis, the plurality of graduations being arranged along a circumferential direction around the rotation axis on the display panel, the polar transformation being referenced to a center of the meter, the first direction corresponding to the circumferential direction, the second direction corresponding to a diametrical direction from the center toward the graduations, and
• determine a position at which the pointer exists using the total value and the fluctuation.