Reading system, reading method, storage medium, and moving body

A reading method, comprising:

• reading a character from a character image, the character being displayed by a segment display and imaged in the character image, the segment display including a plurality of segments;
• performing at least one selected from a group consisting of
• first processing of setting a plurality of determination regions corresponding to the plurality of segments in the character image, and calculating a first score based on a state of pixels of the character in each of the plurality of determination regions,
• second processing of extracting, from the pixels of the character, pixels matching a mask, and calculating a second score based on a match ratio between the pixels of the character and the extracted pixels, the mask being preset,
• third processing of calculating a third score based on a ratio of a length of the character image in a first direction and a length of the character image in a second direction, the second direction crossing the first direction, and
• fourth processing of detecting an existence or absence of a portion of the character in each of the plurality of determination regions and calculating a fourth score based on a comparison result between the detected result and patterns, the patterns being preset;
• and
• calculating a certainty of the reading by using at least one selected from a group consisting of the first score, the second score, the third score, and the fourth score.

A non-transitory computer-readable storage medium storing a program, the program causing a processing device to:

• read a character from a character image, the character being displayed by a segment display and imaged in the character image, the segment display including a plurality of segments;
• perform at least one selected from a group consisting of
• first processing of setting a plurality of determination regions corresponding to the plurality of segments in the character image, and calculating a first score based on a state of pixels of the character in each of the plurality of determination regions,
• second processing of extracting, from the pixels of the character, pixels matching a mask, and calculating a second score based on a match ratio between the pixels of the character and the extracted pixels, the mask being preset,
• third processing of calculating a third score based on a ratio of a length of the character image in a first direction and a length of the character image in a second direction, the second direction crossing the first direction, and
• fourth processing of detecting an existence or absence of a portion of the character in each of the plurality of determination regions and calculating a fourth score based on a comparison result between the detected result and patterns, the patterns being preset;
• and
• calculate a certainty of the reading by using at least one selected from a group consisting of the first score, the second score, the third score, and the fourth score.

A moving body moving through a prescribed region, a segment display being provided in the prescribed region and including a plurality of segments, the moving body comprising:

• an imaging device;
• a reader configured to read, from an image of the segment display imaged by the imaging device, a character displayed by the segment display;
• an extractor configured to cut out, from the image, a character image in which the character is imaged;
• and
• a calculator configured to perform at least one selected from a group consisting of
• first processing of setting a plurality of determination regions corresponding to the plurality of segments in the character image, and calculating a first score based on a state of pixels of the character in each of the plurality of determination regions,
• second processing of extracting, from the pixels of the character, pixels matching a mask, and calculating a second score based on a match ratio between the pixels of the character and the extracted pixels, the mask being preset,
• third processing of calculating a third score based on a ratio of a length of the character image in a first direction and a length of the character image in a second direction, the second direction crossing the first direction, and
• fourth processing of detecting an existence or absence of a portion of the character in each of the plurality of determination regions and calculating a fourth score based on a comparison result between the detected result and patterns, the patterns being preset,
• wherein the calculator is further configured to calculate a certainty of the reading by using at least one selected from a group consisting of the first score, the second score, the third score, and the fourth score.