Image reading apparatus
AssigneeFuji Photo Film Co., Ltd.
InventorTomonori Nishio
Life of this patent
Estimating the term…
Abstract
An image reading apparatus, according to the present invention, capable of obtaining high quality image data in accordance with reading determining conditions is provided. The reading determining conditions for an image are as follows. The first step is waiting for the input of resolution (S200) and then pre-scanning of a photographic film to be read is carried out (S202-206). After that, as setup for the fine scanning, a zoom magnification corresponding to the resolution inputted in S200 and the lens diaphragm condition are determined and then, respective sections are set to that zoom magnification and lens diaphragm condition (S208, 210). Then, fine-scan is carried out for all film images (S212-220).
Claims27
An image reading apparatus comprising:
- a light source for illuminating an original object to be read;
- focussing means provided with a diaphragm capable of altering the width of the luminous flux of a light beam projected through the diaphragm, and for focussing an image recorded on said original document to be read;
- an image sensor for separating said image recorded on said original document to be read, reading said image, and outputting said image as image data when a light which has passed through said focussing means is projected onto said image sensor;
- and
- control means for controlling the state of said diaphragm for adjusting the width of said luminous flux in accordance with the reading determining conditions of said original object to be read,
- wherein one of said reading determining conditions is a focusing magnification of said focusing means and said control means controls the state of said diaphragm so that the higher said focusing magnification, the smaller the width of said luminous flux.
An image reading apparatus comprising:
- a light source for illuminating an original object to be read;
- focussing means provided with a diaphragm capable of altering the width of the luminous flux of a light beam projected through the diaphragm, and for focussing an image recorded on said original document to be read;
- an image sensor for separating said image recorded on said original document to be read, reading said image, and outputting said image as image data when a light which has passed through said focussing means is projected onto said image sensor;
- and
- control means for controlling the state of said diaphragm for adjusting the width of said luminous flux in accordance with the reading determining conditions of said original object to be read,
- wherein one of said reading determining conditions is the effective F number of said original object to be read and said control means controls the state of said diaphragm so that said effective F number is constant.
An image reading apparatus comprising:
- a light source for illuminating an original object to be read;
- focussing means provided with a diaphragm capable of altering the width of the luminous flux of a light beam projected through the diaphragm, and for focussing an image recorded on said original document to be read;
- an image sensor for separating said image recorded on said original document to be read, reading said image, and outputting said image as image data when a light which has passed through said focussing means is projected onto said image sensor;
- and
- control means for controlling the state of said diaphragm for adjusting the width of said luminous flux in accordance with the reading determining conditions of said original object to be read,
- wherein one of said reading determining conditions is the reading size of said original object material and said control means controls the state of said diaphragm so that the larger said reading size becomes, the smaller the width of said luminous flux.
Dependencies are inferred from the claim text.