CODE IMAGE QUALITY CHECKING DEVICE

A code image quality checker us provided which reduces the time required to check the quality of a code image having dots printed at high density. The code image quality checker includes a code image reader that captures the code image, performs binarization, detects the dots of the code image, and allocates a value of either 1 or 0 for each dot to provide dot arrangement data. In addition, the code image quality checker includes a parameter information output unit for outputting parameter information used to control adaptively the operation of each component of the code image reader in accordance with the quality of the code image.