JPH10261072A - Diffusion filter for image scanner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an original readable while recognizing a color in spite of being approximate color through an RGB line sensor, by transmitting the original image through a diffusion filter when reading an original on a mirror surface while using an image scanner. SOLUTION: When using a reflected original for the image scanner, concerning a general reflected original, a diffusion filter 6 is locked inside an original cover 2 by an adsorption board 9 and a diffusion filter holding magnet 8. When using the mirror surface original, the adsorption board 9 is detached from the diffusion filter holding magnet 8, and the diffusion filter 6 is spread over an original platen 5 on a main body 4. Then, the mirror surface original is placed on the diffusion filter 6 and after the original cover 2 is closed, reading is performed by a picture input software. In this case, the state of inserting the diffusion filter 6 between the mirror surface original and the original platen 5 is provided and the state of making cloudy the mirror surface of gold foil, silver foil or aluminium foil is provided so that a light source can be prevented from being almost reflected and the original can be read in an approximate color.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image scanner for inputting an image by connecting to a personal computer.

[0002]

2. Description of the Related Art Conventionally, when reading an original such as a general printed matter or a photograph that reflects light without passing through light (hereinafter referred to as a reflection original) with an image scanner, place the original directly on an original platen and cover an original cover. After closing, the reading is performed by the image input software. Also, when reading an original such as a photographic film that transmits light (hereinafter referred to as a transparent original),
Reading is performed by image input software in the same manner as described above using a transparent original unit (often set as an option). However, when reading an original that is printed on gold foil or silver foil (or aluminum foil), etc. (hereinafter referred to as a mirror-finished original), the ground portion of the gold or silver foil (or aluminum foil) becomes a mirror surface and almost reflects the light source. As a result, the color could not be recognized by the RGB line sensor, and reading could not be performed.

[0003]

In the case of reading the above-mentioned ordinary reflective original or transmissive original, it is necessary to adjust the brightness, contrast and color in accordance with the type of the original and the characteristics of the output device using image input software. However, in a mirror-finished original, the ground portion of gold or silver foil (or aluminum foil) becomes a mirror surface and almost reflects the light source.
The color could not be recognized by the B-line sensor, and the brightness and contrast could not be adjusted and even the color could not be corrected. For this reason, it was not possible to read a mirror original, for example, a printed matter printed on a gold leaf material such as an energy drink. SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and has been invented for the purpose of clearly inputting an image not only on a reflective original or a transparent original but also on a mirror original.

[0004]

In order to achieve the above object, as shown in a perspective view of an image scanner having a diffusion filter of the present invention shown in FIG. 1, one end side inside a document cover 2 (FIG. 1). In the lower side), a diffusion filter mounting base 7 is provided,
A diffusion filter holding magnet 8 is provided on the other end side (the upper side in FIG. 1). Then, one end of the diffusion filter 6 is fixed to the diffusion filter mounting base 7, and an adsorption plate 9 such as an iron plate is attached to the other end.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view of an image scanner to which a diffusion filter according to the present invention is attached. Reference numeral 1 denotes an image scanner to which a diffusion filter is attached. A diffusion filter mounting base 7 is provided at one end side (the lower side in FIG. 1) inside the document cover 2 of the image scanner 1 to which the diffusion filter is attached,
A diffusion filter holding magnet 8 is provided on the other end side (the upper side in FIG. 1). Then, one end of the diffusion filter 6 is fixed to the diffusion filter mounting base 7, and an adsorption plate 9 such as an iron plate is attached to the other end. The diffusion filter 6 is a milky white filter that has been subjected to a process for diffusing light into a transparent polyester film or the like, and has a thickness of about 0.1 mm to 0.3 mm. The junction between the diffusion filter mount 7 and the diffusion filter 6 is thinned and hinged so that it can freely rotate. An adsorption plate 9 such as an iron plate is joined to the end of the diffusion filter 6 on the side opposite to the diffusion filter mounting base 7. When the diffusion filter 6 is not used, the adsorption plate 9 and the diffusion filter holding magnet 8 are magnetically attached. Lock. The method of locking the diffusion filter 6 may be other than the method of magnetically fixing and holding the suction plate 9 and the diffusion filter holding magnet 8.

[0006]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 2 is a diagram showing a state in which a reflection original is used in an image scanner to which the diffusion filter of the present invention is attached. In a general reflection document 11, the diffusion filter 6 is used.
Since there is no need to use the diffusion plate 6, the diffusion filter 6
And the diffusion filter holding magnet 8 is held inside the document cover 2. The diffusion filter 6 is the document cover 2
Is closely contacted with the sponge body 3 inside, and is the same as the sponge body 3 because it is milky white. Then, after a general reflection original 11 is placed on the original platen 5 on the main body 4 and the original cover 2 is closed, reading is performed by screen input software.

FIG. 3 is a view showing a state in which a mirror original is used in an image scanner having a diffusion filter according to the present invention. In this case, the suction plate 9 is removed from the diffusion filter holding magnet 8, and the diffusion filter 6 is laid on the document table 5 on the main body 4. Then, the mirror original 12, for example, a printed matter or the like printed on a gold leaf material such as an energy drink is placed on the diffusion filter 6, the original cover 2 is closed, and reading is performed by screen input software. In this case, the diffusion filter 6 is inserted between the mirror original 12 and the original table 5, and the mirror surface of the gold or silver foil (or aluminum foil) becomes cloudy, so that the light source is hardly reflected. , Can be read in approximate colors.

[0008]

As described above, when reading a specular original using an image scanner to which the diffusion filter of the present invention is attached, the light source is made of gold or silver foil (or aluminum foil) by transmitting the light through the diffusion filter. There is almost no reflection at the part. For this reason, the color can be recognized while the color is approximate by the RGB line sensor, and can be read by the image input software. In addition, when reading a general reflection original, the diffusion filter can be locked inside the original cover, so that ordinary reading can be performed without the diffusion filter being in the way.

[Brief description of the drawings]

FIG. 1 is a perspective view of an image scanner to which a diffusion filter according to the present invention is attached.

FIG. 2 is a diagram showing a state in which a reflection original is used in an image scanner to which a diffusion filter according to the present invention is attached.

FIG. 3 is a diagram showing a state in which a mirror original is used in an image scanner to which a diffusion filter according to the present invention is attached.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Image scanner with diffusion filter attached 2 Document cover 3 Sponge body 4 Main body 5 Document table 6 Diffusion filter 7 Diffusion filter mounting table 8 Diffusion filter holding magnet 9 Adsorption plate 10 Hinge section 11 Reflected document 12 Mirrored document

Claims (1)

[Claims] 1. A diffusion filter mounting base (7) is provided on one end side inside a document cover (2), a diffusion filter holding magnet (8) is provided on the other end side, and one end side of the diffusion filter (6) is provided. It is fixed to a diffusion filter mounting base (7), and an adsorption plate (9) such as an iron plate is attached to the other end side. When reading an original printed on gold foil or silver foil (or aluminum foil) or the like, the diffusion filter ( 6) is removed from the diffusion filter holding magnet (8) and spread on the document table (5). The document printed on the gold foil or silver foil (or aluminum foil) is placed on the diffusion filter (6) and the document cover is placed. (2) A diffusion filter for an image scanner, which can be read clearly by image input software after closing.