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Image reading apparatus, image recording medium and image forming apparatus

a reading apparatus and image recording technology, applied in the direction of instruments, diffusion transfer processes, optics, etc., can solve the problems of large amount of light lost at the time of image reading, difficult for photoelectric conversion elements to obtain sufficient light, and output signals with a high sn-ratio, etc., to achieve satisfactory image, wide dynamic range, and wide dynamic range

Inactive Publication Date: 2005-06-30
FUJIFILM HLDG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an image reading apparatus that can identify the type of color photosensitive material used and adjust its reading conditions accordingly, resulting in a wider dynamic range of images and easier reordering and remaking. Additionally, the apparatus can read images without needing to irradiate a large quantity of light or have a long exposure time. The apparatus can also use different light sources and sensors for different types of color photosensitive materials, and can adjust the reading conditions based on information applied to the color photosensitive material. The invention also provides an image recording medium and an image forming apparatus that use the image reading apparatus.

Problems solved by technology

However, in conventional processing systems, the monochromatically developed color photographic film could not be distinguished from the other films, and thus, such problem that reading is not suitably performed was caused.
While a color paper efficiently reflects light by a baryta layer thereof, a color photographic film does not have a function for efficiently reflecting incident light, and thus, a large quantity of light is lost at the time of image reading.
Therefore, there was such problem that, if the quantity of light is not large or a lot of time is not spent when the reading is performed, it is difficult for photoelectric conversion elements to obtain sufficient light and output signals with a high SN-ratio.
Further, when images are read from a support side (base side), an anti-halation layer consisting of silver colloid damps the light.
Therefore, there was such problem that, if an even larger quantity of light is not irradiated or if a longer time is not taken for reading, the signals with a high SN-ratio cannot be obtained.

Method used

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  • Image reading apparatus, image recording medium and image forming apparatus
  • Image reading apparatus, image recording medium and image forming apparatus

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first embodiment

[0075] (First Embodiment)

[0076]FIG. 1 shows an overall structure of an image processing system 10. As shown in FIG. 1, the image processing system 10 consists of a magnetic information reading portion 12, a reference exposing portion 14, a perforation detecting sensor 13 which is used when an APS film is being read, a monochromatic developing portion 16, a buffer portion 18, a film scanner 20, an image processing device 22, a printer portion 24 and a processor portion 26. The perforation detecting sensor 13 is structured so that a light emitting element and a light receiving element are disposed opposite to each other.

[0077] The image processing system 10 reads film images (silver images) recorded on a color photographic film such as a negative film or a reversal film (positive film), performs an image processing, and prints the processed images on photographic printing papers. The image processing system 10 can process film images on, for example, the following types of photograph...

second embodiment

[0165] (Second Embodiment)

[0166] In the first embodiment, the illuminating units 90A and 90B emit light having the same wavelength (IR light having a central wavelength of about 950 nm). However, the illuminating units 90A and 90B may emit light having different wavelengths,(e.g., 850 nm and 1,310 nm). In this case, reflected light and transmitted light can be simultaneously detected. Namely, as shown in FIG. 21, a half mirror 91A is disposed between the focusing lens 94A and an area corresponding to an area in which the area CCD 96A is disposed in FIG. 11, and in place of the area CCD 96A which has sensitivity for IR light having a central wavelength of about 950 nm, area CCDs 96A1 and 96A2, which have sensitivity for light of different wavelengths, are respectively disposed in directions in which light is branched by the half mirror 91A. Similarly, a half mirror 91B is disposed between the focusing lens 94B and an area corresponding to an area in which the area CCD 96B is disposed...

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Abstract

In order to provide an image reading apparatus, which can read images on a monochromatically developed color photographic film, it is provided a reading conditions changing portion, which changes reading conditions of sensors on the basis of information applied to the color photosensitive material, or is provided light sources which irradiate light, having at least one of wavelength and light quantity being different from that of the other, at an emulsion surface side and a support surface side of the color photosensitive material, respectively.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to an image reading apparatus, an image recording medium and an image forming apparatus. Specifically, the present invention relates to an image reading apparatus, which reads silver images recorded on a color photosensitive material on the basis of light reflected by the color photosensitive material and light transmitted through the color photosensitive material; an image recording medium, on which image data or the like read by the image reading apparatus is recorded; and an image forming apparatus, which regenerates the image data recorded on the image recording medium so as to form images. [0003] 2. Description of the Related Art [0004] A photosensitive material using silver halide has been developed more and more in recent years, and at present, high-quality color images can be easily obtained. For example, in a method generally called color photography, the photography is perform...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04N1/40
CPCH04N1/40
Inventor KITO, EIICHIOKINO, YOSHIHARUMORIMOTO, YOSHINORINISHIO, TOMONORI
Owner FUJIFILM HLDG CORP
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