Reading device, image processing apparatus, reading method, and non-transitory recording medium

A reading method comprising:

• emitting light to a subject;
• reading, by an imaging device, light reflected from the subject to generate an image;
• and
• switching to use between a first inclination correction device to mechanically correct an inclination of the image obtained at the imaging device and a second inclination correction device to electronically correct an inclination of the image obtained at the imaging device,
• the switching including
• switching to use the first inclination correction device in a case where the subject includes subjects of a single size but does not include subjects of multiple sizes, and
• switching to use the second inclination correction device in a case where the subject includes subjects of multiple sizes.

A non-transitory recording medium storing a plurality of instructions which, when executed by one or more processors, causes the processors on a reading device to perform a method,

• the reading device including:
• a light source to emit light to a subject;
• an imaging device to receive light reflected from the subject and generate an image;
• a first inclination correction device to mechanically correct an inclination of the subject;
• and
• a second inclination correction device to electronically correct an inclination of the image obtained at the imaging device,
• the method comprising:
• switching to use between the first inclination correction device and the second inclination correction device,
• the switching including
• switching to use the first inclination correction device in a case where the subject includes subjects of a single size but does not include subjects of multiple sizes, and
• switching to use the second inclination correction device in a case where the subject includes subjects of multiple sizes.