Image reading apparatus
AssigneeCanon Kabushiki Kaisha
InventorsAkio Suzuki, Hiroyuki Tsuji
Life of this patent
Estimating the term…
Abstract
An image reading apparatus for converting an image on an original into a first image signal by a reading unit and for converting the first image signal into a second image signal comprises: an input unit to set a zoom ratio; a driving motor to drive the reading unit so as to generate the first image signal indicative of the first image, in which the first image is an image obtained by zooming the original at a first zoom ratio; and a converter to convert the first image signal generated from the reading unit into the second image signal indicative of the second image, in which the second image is an image obtained by zooming the first image at a second zoom ratio according to the first zoom ratio and the zoom ratio set by the input unit.
Claims19
An image reading apparatus for converting an original image on an original into a first image signal by a reading unit and for converting the first image signal into a second image signal, said apparatus comprising:
- input means for inputting a first zoom ratio;
- determining means for determining a second zoom ratio and a speed of said reading unit;
- driving means for driving said reading unit at the speed determined by said determining means so as to generate the first image signal indicative of a first image;
- and
- converting means for converting the first image signal generated from said reading unit into the second image signal indicative of a second image, in which the second image is an image obtained by zooming the first image at the second zoom ratio,
- wherein, in case of driving said reading unit at the determined speed and converting the first image signal according to the second zoom ratio, said determining means determines the second zoom ratio and the speed such that the second image can be obtained by zooming the original image at the first zoom ratio.
An image reading apparatus for converting an original image on an original into a first image signal by a reading unit and for converting the first image signal into a second image signal, said apparatus comprising:
- input means for inputting a first zoom ratio;
- determining means for determining a speed of said reading unit;
- converting means for converting the first image signal into the second image signal in accordance with a predetermined zoom ratio when the first zoom ratio does not satisfy a predetermined condition;
- and
- driving means for driving the reading unit at the speed determined by said determining means when the first zoom ratio does not satisfy the predetermined condition,
- wherein, in case of driving said reading unit at the determined speed and converting the first image signal according to the predetermined zoom ratio, said determining means determines the speed of said reading unit such that the second image can be obtained by zooming the original image at the first zoom ratio.
An image magnification method in an image reading apparatus having a reading unit to read an original image on an original, comprising the steps of:
- inputting a first magnification ratio;
- determining a second magnification ratio and a speed of the reading unit;
- driving the reading unit at the speed determined in said determining step;
- and
- converting an image signal generated by the reading unit such that an image represented by the image signal is magnified in accordance with the second magnification ratio,
- wherein, in said determining step, in case of driving the reading unit at the determined speed and converting the image signal according to the second magnification ratio, the second magnification ratio and the speed are determined such that the image can be obtained by magnifying the original image at the input first magnification ratio.
Dependencies are inferred from the claim text.