Image reading apparatus including means for accurately determining the location of read image information

An image reading apparatus comprising:

• reading means for reading an image of an original and for outputting an electric signal corresponding thereto;
• designating means for designating location information of the original image;
• detecting means for detecting a ramp of the reading direction of said reading means with respect to the original using said designating means;
• and
• means for informing an operator of said apparatus that the ramp has been detected, in response to the detection by said detecting means.

An image reading apparatus comprising:

• means for reading an original image;
• first designating means for designating location information of the original image;
• second designating means for designating a read timing of the original image;
• and
• means for providing additional information to facilitate reading of the original image,
• wherein said providing means comprises at least said first or second designating means.

An image reading apparatus comprising:

• means for reading an original image;
• designating means for designating a location of the original image;
• and
• calculating means for calculating a location from which a reading of the original image is started, using said designating means.

An image reading apparatus comprising:

• means for reading an original image;
• designating means for designating a location of the original image;
• and
• calculating means for calculating a location from which a reading of the original image is started, using said designating means,
• wherein said designating means comprises a plurality of lines which are perpendicular to a main scan direction and which have different intervals therebetween.

An image reading apparatus comprising:

• reading means for reading an image of an original by manually scanning the original and for outputting an electrical signal corresponding thereto, said reading means being capable of starting its reading operation from any location on the original;
• detecting means for detecting absolute location information of the original image read by said reading means;
• and
• generating means for generating a synchronization signal for reading out the image of the original in synchronization with manual scanning of said reading means.