Image reading apparatus and image reading method
AssigneeFuji Photo Film Co., Ltd.
InventorsKenji Suzuki, Yoshio Ozawa, Hideo Ishizaka
Life of this patent
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Abstract
A low cost image reading apparatus and an image reading method is obtained which allows a high speed image reading process to be performed. When a frame image recorded on a negative film is read, the amount of light of a lamp and the charge accumulation time of a CCD area sensor provided in the prescan section of a film image reading apparatus are fixed. An image buffer is also provided for holding the density values data (the image data) obtained by the fine scan section until the auto setup processing and positive image examination, which are based on the density values data, are completed.
Claims13
An image reading apparatus comprising:
- transporting means for transporting a photographic photosensitive material on which an image is recorded in such a way that the image passes in sequence over a first reading position and a second reading position;
- a first photometric system which is provided with a first light source for irradiating light onto the image at the first image reading position and which is also provided with a first image sensor for reading with fixed photometric condition the image and outputting the image as image data on the basis of one of the light transmitted through the image or the light reflected from the image;
- a second photometric system which is provided with a second light source for irradiating light onto the image at the second image reading position and which is also provided with a charge accumulation-type second image sensor for reading the image and outputting the image as image data on the basis of one of the light transmitted through the image or the light reflected from the image;
- and
- control means for controlling the second photometric system in such a way that the image is read by changing at least one of amount of light irradiated from the second light source and a charge accumulation time of the second image sensor on the basis of the image data output from the first image sensor.
An image reading method, wherein:
- a photographic photosensitive material on which an image is recorded is transported in such a way that the image passes in sequence over a first reading position and a second reading position;
- light from a first light source is irradiated onto the image at the first image reading position, and the image is read by a first image sensor with fixed photometric condition and output as image data on the basis of one of the light transmitted through the image or the light reflected from the image;
- at least one of amount of light irradiated onto the image from a second light source and a charge accumulation time of a charge accumulation-type second image sensor are changed on the basis of the output image data, and light from the second light source is irradiated onto the image at the second image reading position and the image is read by the second image sensor and output as image data on the basis of one of the light transmitted through the image or the light reflected by the image.
Dependencies are inferred from the claim text.