1. An image scanner-reader comprising: image read means for reading an original document and producing image data, having a resolution, of said original document, said image read means comprising: a light source for irradiating said original document, and a printed circuit board receiving reflected light from said original document and producing said image data of said original document, said printed circuit board comprising: a buffer memory storing said image data, and resolution conversion means for lowering the resolution of said image data provided by said image read means if a relative moving speed between said original document and said image read means is decreased, said resolution being lowered only if the buffer memory is filled substantially to capacity; and employing control means, coupled to the image read means, for controlling a relative moving speed between said original document and said image read means, said employing control means lowering the relative moving speed only if the buffer memory is filled substantially to capacity, wherein if an original document reading operation is suspended, said employing control means controls a restart of the original document reading operation after decreasing the relative moving speed to a slow reading speed.