| 摘要 |
<p>An image change detecting apparatus comprises a differentiating device and a detecting device. The differentiating device differentiates twice a value of an image signal corresponding to a plurality of line-pixels on a single predetermined line, of pixels forming a single static image. The detecting device detects a part sequentially changing in concentration in a partial image including the plurality of line-pixels. The partial image is a part of the static image, when the twice differentiated result is zero. <IMAGE></p> |
