Image reading device, image generating device, and recording medium

A non-transitory, computer-readable recording medium storing a program that causes a computer to serve as:

• an image reader that reads an image on a document;
• and
• a hardware processor, wherein:
• the hardware processor detects an operation indicating a start of a reading of the image on the document,
• the hardware processor (i) begins performing iterative adjustment of a plurality of correction parameters by retrieving light intensity data and calculating at least one of the correction parameters based on the retrieved light intensity data and on at least one of a plurality of reading conditions for the image reader, upon the operation indicating the start of the reading of the image being detected, and (ii) continues performing the iterative adjustment of the correction parameters, until the iterative adjustment is completed or the hardware processor detects entry of a document reading instruction,
• the hardware processor checks for completion of adjustment of one or more of the correction parameters for one or more determined reading conditions included in the document reading instruction, after the hardware processor detects the entry of the document reading instruction,
• if the adjustment of the one or more correction parameters is completed, the hardware processor instructs the image reader to read the image using the one or more correction parameters for the one or more determined reading conditions, and
• if the adjustment of the one or more correction parameters is not completed, the hardware processor performs adjustment of uncompleted correction parameter(s) and then instructs the image reader to read the image using the one or more correction parameters for the one or more determined reading conditions.