Patent ID: 6839153

Claim:
An image reader having a conveying part that conveys an original, and first and second reading parts that read the original conveyed by the conveying part, in which if the same image has been read by the first and second reading parts, a density value of a read image obtained from the first reading part is higher than a density value of a read image to be obtained from the second reading part, comprising: a noise detection part that judges, if a difference between density values of the same area on the original read by the first and second reading parts, respectively, exceeds a predetermined threshold, that a streaks-shaped noise is contained in the read image obtained by the first reading part; and a noise removal part that generates, if the noise detection part judges that the streaks-shaped noise is not contained in the read image obtained by the first reading part, an output image using the read image obtained by the first reading part, and that generates, if the noise detection part judges that the streaks-shaped noise is contained in the read image obtained by the first reading part, the output image using the read image obtained by the second reading part.