Patent ID: 10291819

Abstract:
An image reading device (1) includes a light emission control portion (84), an image scanning portion (11), and a difference data sequence generating portion (852, 853, 855). The difference data sequence generating portion (852, 853, 855) sequentially obtains image data sequences of a linear area both when a light emitting portion is in a light-on state and when the light emitting portion is in a light-off state. In addition, the difference data sequence generating portion (852, 853, 855) sequentially generates difference data sequences (Ys) that are results of subtracting an image data sequence (X2) obtained in a light-off state of the light emitting portion from an image data sequence (X1) obtained in a light-on state of the light emitting portion, among a pair of image data sequences (X1, X2) obtained at each blinking cycle of the light emitting portion.