Reading apparatus, reading method, and reading program

A reading method that reads a sheet, the reading method comprising:

• causing a first LED to emit light with a specific wavelength;
• generating a reference signal according to a quantity of received light emitted from the first LED and reflected off the sheet;
• causing a light emitting element to emit light, the light emitting element including a second LED configured to emit light with the specific wavelength and a phosphor configured to be excited by the light emitted from the second LED;
• generating an image signal according to a quantity of received light emitted from the light emitting element and reflected off the sheet;
• and
• generating an image representing the sheet from a differential result obtained by removing a component corresponding to the reference signal from the image signal.

A non-transitory recording medium storing a computer readable program that reads a sheet, the program causing a computer to execute:

• causing a first LED to emit light with a specific wavelength;
• generating a reference signal according to a quantity of received light emitted from the first LED and reflected off the sheet;
• causing a light emitting element to emit light, the light emitting element including a second LED configured to emit light with the specific wavelength and a phosphor configured to be excited by the light emitted from the second LED;
• generating an image signal according to a quantity of received light emitted from the light emitting element and reflected off the sheet;
• and
• generating an image representing the sheet from a differential result obtained by removing a component corresponding to the reference signal from the image signal.