Image forming apparatus

An image reading apparatus comprising:

• a plurality of one-dimensional image sensors each for obtaining two-dimensional original image information by scanning an original in a primary scanning direction while moving relatively to the original in a secondary scanning direction, said secondary scanning direction being a feeding direction of the original which is perpendicular to the primary scanning direction,
• wherein the image sensors are disposed so that element arrays of the image sensors are arranged in parallel to each other with respect to the secondary direction,
• wherein the image sensors concurrently read an image of the original on respective pixel lines which are adjacent to each other with respect to the secondary scanning direction, and
• wherein an identical optical image is formed on each of the image sensors and respective reading timings of each of the image sensors are shifted from each other, so that the image sensors read the image of the original at positions which are shifted from each other by a distance between two adjacent lines in the secondary scanning direction corresponding to a resolution in the primary scanning direction obtained by each of the image sensors.

An image reading apparatus comprising:

• a plurality of one-dimensional image sensors each for obtaining two-dimensional original image information by scanning an original in a primary scanning direction while moving relatively to the original in a secondary scanning direction, said secondary scanning direction being a feeding direction of the original which is perpendicular to the primary scanning direction,
• wherein the image sensors are disposed so that element arrays of the image sensors are arranged in parallel to each other with respect to the secondary direction,
• wherein the image sensors concurrently read an image of the original on respective pixel lines which are adjacent to each other with respect to the secondary scanning direction, and
• wherein the image sensors are aligned so as to be optically shifted from each other and respective reading timings of each of the image sensors are shifted from each other, so that the image sensors read the image of the original at positions which are shifted from each other by a distance between two adjacent lines in the secondary scanning direction corresponding to a resolution in the primary scanning direction obtained by each of the image sensors.

An image reading apparatus comprising:

• (a) a plurality of one-dimensional image sensors each for obtaining two-dimensional original image information by scanning an original in a primary scanning direction while moving relatively to the original in a secondary scanning direction, said secondary scanning direction being a feeding direction of the original which is perpendicular to the primary scanning direction,
• wherein the image sensors are disposed so that element arrays of the image sensors are arranged in parallel to each other with respect to the secondary direction,
• wherein the image sensors concurrently read an image of the original on respective pixel lines which are adjacent to each other with respect to the secondary scanning direction;
• and
• (b) an image processing means for concurrently processing odd numbered line data and even numbered line data,
• wherein image data of at least two adjacent lines are concurrently inputted to the image processing means, and two or more image operation elements realizing a same function share a line memory for keeping image date separate from each other in order to conduct an image processing operation with respect to a pixel aggregate including N pixels.times.L lines, where both N and L are natural numbers.

An image reading apparatus comprising:

• (a) a plurality of one-dimensional image sensors each for obtaining two-dimensional original image information by scanning an original in a primary scanning direction while moving relatively to the original in a secondary scanning direction, said secondary scanning direction being a feeding direction of the original which is perpendicular to the primary scanning direction,
• wherein the image sensors are disposed so that element arrays of the image sensors are arranged in parallel to each other with respect to the secondary direction,
• wherein the image sensors concurrently read an image of the original on respective pixel lines which are adjacent to each other with respect to the secondary scanning direction;
• (b) an image processing means for concurrently processing odd numbered line data and even numbered line data;
• and
• (c) an outputting device for recording images using two laser diodes in accordance with data outputted from the image processing means,
• wherein a first one of the two laser diodes for odd numbered lines is controlled based on the odd numbered line data, and a second one of the two laser diodes for even numbered lines is controlled based on the even numbered line data.