Optical information reading method, optical information reading device, and storage medium

An optical information reading device, comprising:

• an imager;
• an imaging controller configured to cause the imager to periodically capture an image;
• a reading part configured to analyze the image captured by the imager to read optical information contained in the image;
• an estimating part configured to estimate, based on images captured within a first time range, an amount of movement of the imager in the first time range;
• and
• a reading controller configured to:
• determine whether the amount of movement estimated by the estimating part satisfies a predetermined first upper limit;
• and when it is determined that the estimated amount of movement satisfies the first upper limit, cause the reading part to perform the analyzing on an image captured within or after the first time range to read the optical information contained in the image.

A non-transitory machine-readable storage medium containing program instructions executable by a computer, and when executed, causing one computer or a plurality of computers in cooperation to execute an optical information reading method, the method comprising:

• periodically capturing an image by an imager;
• analyzing the image captured by the imager to read optical information contained in the image;
• estimating, based on images captured within a first time range, an amount of movement of the imager in the first time range;
• and
• determining whether the estimated amount of movement satisfies a predetermined first upper limit, and, when it is determined that the estimated amount of movement satisfies the first upper limit, performing the analyzing on an image captured within or after the first time range to read the optical information contained in the image.