JP2002116480A - Device for inputting picture-and-writings manuscript - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attach a lighting apparatus at a position on an arm where imprinting of exit light exited from the lighting apparatus in a video camera can be eliminated and illumination intensity unevenness can be minimized. SOLUTION: In a device 1 for inputting a picture-and-writings manuscript, the arm 7 is erected with a prescribed tilt angle to a stage 3 for mounting the picture-and-writings manuscript 4 thereon, the video camera 8 is disposed at an upper position of the arm 7 by hanging to the stage 3 and the lighting apparatus 10 is attached on the arm 7 toward the picture-and writings manuscript 4. The device 1 for inputting the picture-and-writings manuscript which is distinguished by attaching the lighting apparatus 10 on the arm 7 at a lighting apparatus attaching position corresponding to size L of the picture-and-writings manuscript 4 toward photographing size S of the video camera 8, is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document input device for photographing a document placed on a stage with a video camera from above while irradiating the document with emission light emitted from a lighting device. The present invention relates to a document input device in which an illuminating device is mounted on an arm so as to eliminate the reflection of the emitted light on a video camera and minimize the unevenness of the illuminance of the emitted light on the document.

[0002]

2. Description of the Related Art Conventionally, as an audio-visual device used for conferences and lectures, a video document is placed on a flat stage, and a video camera is irradiated from above by irradiating the document with light emitted from a lighting device. 2. Description of the Related Art A document input device that captures an image of a document and projects the captured image of the document on a monitor, a screen, or the like is often used.

As an example of this type of document original input device,
Japanese Patent Application Laid-Open No. H11-174578 discloses that when an illuminating device is arranged at a position close to a mounting table, reflection of light emitted from the illuminating device onto a video camera is prevented, and uneven illuminance on a document is reduced. A document input device that can be reduced is disclosed.

FIG. 7 is a diagram for explaining a conventional document input device.

A conventional document input device 100 shown in FIG.
Is disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 11-174578. In brief, here, an arm 102 is rotatably mounted on one end of a mounting table 101 for mounting an object to be photographed. A video camera 103 is rotatably mounted on the upper end of the arm 102. At this time, the arm 102 is attached so as to be rotatable around a rotation shaft 104 a provided at one end of the mounting table 101, while the video camera 103 is attached to the arm 102.
Is mounted so as to be rotatable around a rotation shaft 104b provided at the upper end of the camera. The arm 102 has a built-in lighting means 105 such as a fluorescent lamp. Further, the arm 102 has a louver 106 for blocking a light beam emitted from the illumination means 105 at a predetermined angle, and a louver 10
6 and a diffusion plate 107 for diffusing a light beam from the illumination means 105 are attached to the mounting table 101. Further, the lighting means 105 is provided behind the lighting means 105.
There is provided a reflection plate 108 for reflecting light rays from the light source.
The range Q (hatched portion) on the mounting table 101 is cut off by the louver 106 so that the illuminating hand 105
The range from which the light from does not reach directly.

Here, A in the figure is a photographing light beam indicating the photographing range of the video camera 103, B is a light beam reflected by the mounting table 101 of the photographing light beam, and C is a video camera 103.
Is a photographing light beam surrounded by the photographing light beam A.

At this time, the light emitted from the portion inside the area D of the illuminating means 105 includes the
01 includes reflected light rays that are reflected by the camera camera 103 and captured by the video camera 103.

The above-mentioned illuminating means 105 is arranged so as to extend outside and inside a region including the reflected light beam E reflected by the mounting table 101 and photographed by the video camera 103. The louver 106 is disposed on the front side of the illumination means 105 inside the area D in order to block such reflected light rays E.

[0009]

According to the conventional document input device 100 described above, the illuminating means 105 is built in the arm 102 and is arranged at a position close to the mounting table 101. It is possible to improve the illuminance at least, and by arranging the louver 106 on the front surface of the illumination means 105, it is possible to block the reflected light beam E from the illumination means 105 and Although the illuminance can be made uniform without unevenness, the position of the illuminating unit 105 cannot be changed according to the size of a document to be photographed because the illuminating unit 105 is fixed in the arm 102. Therefore, if it is necessary to change the position of the illuminating means 105 according to the size of the document, it is possible to cope by changing the rotation angle of the arm 102.
It is necessary to adjust the rotation position of the video camera 103 rotatably attached to the upper end in accordance with the rotation angle of the arm 102. Therefore, the operability of the document input device 100 is inferior to the size of the document. Which problems have arisen.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and a first invention is to raise an arm by tilting an arm at a predetermined angle with respect to a stage on which a document is placed. In a document input device in which a video camera is vertically mounted on the arm above the arm toward the stage, and a lighting device is mounted on the arm toward the document, the lighting device is mounted on the arm. A document input device, wherein the document input device is attached to a lighting fixture mounting position corresponding to a size of the document with respect to a shooting size of the video camera.

According to a second aspect of the present invention, in the document input device of the first aspect, the illuminating device includes an exterior frame mounted on the arm, and a light source provided in the exterior frame. A document original input device comprising: an emission direction / visible angle control member provided in front of the light source to control the emission direction / visible angle of the emitted light emitted from the light source.

According to a third aspect of the present invention, in the document input device of the first aspect, the illuminating device includes an exterior frame mounted on the arm, and a light source provided in the exterior frame. A light-shading material that is provided in front of the light source and that is formed to be gradually thicker from the upper side to the lower side and that controls the transmittance of light emitted from the light source. This is a document original input device.

According to a fourth aspect of the present invention, in the document input device of the first aspect, the illuminator includes an exterior frame mounted on the arm, and a light source provided in the exterior frame. An emission direction / visible angle control member provided in front of the light source to control the emission direction / visible angle of emission light emitted from the light source; and an emission direction / visible angle control material provided in front of the emission direction / visible angle control material and from above. A document input device, comprising: a thinned shade material that is formed from a thin portion to a thick portion toward a lower portion and controls the transmittance of light emitted from the light source.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a document input device according to the present invention will be described below in detail with reference to FIGS.

FIG. 1 is a perspective view showing the overall configuration of a document input device according to the present invention, and FIG. 2 is a view for explaining the configuration of the illuminator shown in FIG. FIG. 3 (b) is a diagram showing the embossing of the uneven thickness shade material attached to the lighting device, and FIG. 3 is a diagram showing the emission direction / visible angle control material in the lighting device shown in FIGS. FIG. 4 is a side view for explaining the operation of the injection direction / visible angle control material, FIG. 4 (a) shows a case where the injection direction / visible angle control material is not used, and FIG. Fig. 5 (a) is a view showing a case where an injection direction / visible angle control material is used.
(B) is a side view for explaining the operation when the ejection direction / visible angle control material is not used and when it is used in the document original input device according to the present invention, and FIG. 6 is a document original input device according to the present invention. FIG. 9 is a schematic diagram for explaining a lighting fixture mounting position where a lighting fixture is mounted on an arm in accordance with the size of a document to be shot with respect to a shooting size of a video camera, and FIG. Show,
FIG. 4B is a diagram illustrating a case where shooting size ≧ document size.

As shown in FIG. 1, in a document input device 1 according to the present invention, a housing 2 serving as an exterior is formed in a box shape using a resin material or the like. On the upper surface of the housing 2, a stage 3 is formed in a flat plate shape integrally with the housing 2, and a document 4 on which characters, images, and the like are printed on the stage 3.
Can be detachably mounted. Stage 3
An operation panel 5 that is slightly obliquely inclined along the longitudinal direction is provided at the front, and a rear protruding portion 2a projects obliquely upward along the longitudinal direction integrally with the housing 2 behind the stage 3. An operation panel 6 is also provided on the rear protruding portion 2a.

An arm 7 is attached to an intermediate portion of the rear projecting portion 2a formed on the housing 2 so as to be rotatable between two positions, a storage position and a standing position. At this time, the storage position of the arm 7 is set to a position close to the stage 3 for the purpose of miniaturization at the time of transportation, while the upright position of the arm 7 is set to take a position inclined by a predetermined angle.
In this embodiment, when a virtual line extending virtually from the lower end of the arm 7 with the stage 3 as a reference plane intersects with the stage 3, the predetermined angle θ is set to a position where the predetermined angle θ stands up to about 54 °, for example.

A well-known video camera 8 is provided vertically above the arm 7 so as to face the stage 3, and the video camera 8 can photograph the document 4 on the stage 3.

On the arm 7, a lighting device 10, which constitutes a main part of the present invention, extends laterally at substantially right angles to the arm 7, and is directed toward the document 4 on the stage 3. Attached. At this time, the extending direction of the lighting device 10 is set to be along the longitudinal direction of the stage 3. The lighting fixture 10 is provided so as to be movable on the arm 7 in the vertical direction. Then, as described later, the lighting fixture 10
Is mounted on the arm 7 at a lighting fixture mounting position corresponding to the size of the document 4 with respect to the shooting size of the video camera 8. At this time, the lighting device 10 may have a structure that can be moved manually or a structure that can be automatically moved by driving a pulse motor or the like.

Here, the lighting fixture 1 constituting a main part of the present invention.
Reference numeral 0 denotes a light source 12 (hereinafter, referred to as a white fluorescent lamp) 12 provided in an exterior frame 11 that carries the exterior of the lighting device 10 as shown in an enlarged manner in FIG. An emission direction / visible angle control material (light control material) 13 provided in front of the white fluorescent lamp 12 within the
Exterior frame 11 provided in front of viewing angle control material 13
And a transparent or milky shaded shade material 14 attached to the front surface of the white fluorescent lamp 12b and the emission direction / visible angle control material 13 so as to also protect against dust.

In the embodiment, a white fluorescent lamp 12 is used as a light source.
However, the invention is not limited thereto, and an EL (electroluminescence), an LED (light emitting diode), or the like may be used.

Returning to FIG. 1, the lighting fixture 10 includes an exterior frame 11
The guide 11a formed on the arm 7 slides up and down along the arm 7, and the illuminator 10 is fixed by the document shadow size as described later with reference to the scale 7a cut on the arm 7. Is fixed via a thumb screw 15.

Here, the above-described emission direction / visible angle control material (light control material) 13 is directed toward the document 4 placed on the stage 3 in front of the white fluorescent lamp 12 provided in the outer frame 11. The emission direction / visible angle control member can control the emission direction and the visible angle range of the emitted light emitted from the white fluorescent lamp 12, and further, the video document 4 placed on the stage 3 can be attached to a video camera. The camera 8 can prevent the light emitted from the white fluorescent lamp 12 from being reflected in the video camera 8 when the image is captured by the camera 8.

More specifically, as shown in an enlarged manner in FIG. 3, the above-mentioned injection direction / visible angle control member is formed by hanging a large number of louvers 13b on a transparent film 13a substantially in parallel using an adhesive or the like. Has been established. The louvers 13b are formed to have a thickness of about 0.4 to 0.63 mm using a cellulose resin, and the pitch of each louver 13b on the transparent film 13a is set to about 0.5 mm.

When the visible angle of the injection direction / visible angle control member 13 is set to, for example, ± 30 ° with respect to the normal,
The light transmittance on the normal is, for example, 70%, the light transmittance is, for example, 35% at ± 15 ° with respect to the normal, and the light transmittance is, for example, 0% (cut at ± 30 ° with respect to the normal). OFF), the emission direction and the visible angle with respect to the emission light from the white fluorescent lamp 12 can be controlled.

The injection direction / visible angle control material 1 of the embodiment
Reference numeral 3 denotes a single-layer type formed by a large number of louvers 13b suspended on the transparent film 13a, but the present invention is not limited to this.
3 may be a multi-layered injection direction / visible angle control member 13 laminated in the order of a transparent film 13a, a large number of louvers 13b, transparent films 13a,.

In addition, the injection direction / visible angle control member 13 of the embodiment has a large number of louvers 13 on a transparent film 13a.
The pitches of the louvers 13b are not limited to this, but the pitch of the louvers 13b is gradually reduced from the upper side (the video camera side) to the lower side (the stage side), or Louver 13b to transparent film 1
It may be a structural form such as bonding at a predetermined angle to 3a.

As shown in FIGS. 4 (a) and 5 (a), the case where the emission direction / visible angle control member 13 is not used. However, in FIG. 3 (a), the transparent film 13a is equivalently used. In FIG. 2, the emitted light from the white fluorescent lamp 12 in the lighting fixture 10 is emitted in all directions, so that the emitted light (irradiation light) to the document 4 placed on the stage 3 is used. Efficiency gets worse.

On the other hand, as shown in FIGS. 4B and 5B, when the emission direction / visible angle control member 13 is used, as described above, the white fluorescent lamp in the lighting fixture 10 is used. 1
Since the emission direction and visible angle of the light emitted from the light source 2 can be controlled, the light emitted from the white fluorescent lamp 12 can be applied to the document 4 placed on the stage 3 almost uniformly without illuminance unevenness. Since the reflection of the emitted light on the camera 8 can be prevented, the image obtained by photographing the document 4 with the video camera 8 becomes a high-quality image.

Returning to FIG. 2 (a), the uneven thickness shade 14 attached to the front surface of the lighting fixture 10 is formed to be thin on the upper side (video camera side) using a transparent resin material, and is formed on the lower side. It is formed gradually thicker toward the side (stage side). As a result, since the uneven thickness shade 14 is formed to be thin from the upper side to the central portion, the transmittance of the light emitted from the white fluorescent lamp 12 increases, so that the stage 3
The upper document 4 can be illuminated brightly, while the lower side is formed thick, so that the transmittance of the light emitted from the white fluorescent lamp 12 becomes low. Of the emitted light can be prevented.
In the embodiment, the uneven thickness shade 14 is attached in front of the injection direction / visible angle control member 13,
The uneven thickness shade 14 may be directly attached in front of the light source such as the white fluorescent lamp 12 without using the visible angle control member 13.

Further, as shown in FIG. 2B, the inner surface (light source side surface) of the uneven thickness shade 14 is etched from the upper side (video camera side) to the lower side (stage side) by etching or the like. The transmittance of the light emitted from the white fluorescent lamp 12 can be controlled by performing stepwise processing from rough graining to dense graining. Here, for example, the grain 1 on the upper side is roughened and has a high transmittance, and the grain 2 and the grain 3 and the grain 4 are textured downward toward the lower side to reduce the transmittance.

Next, the lighting fixture mounting position for mounting the lighting fixture 10 on the arm 7 in accordance with the size of the document 4 with respect to the shooting size of the video camera 8 will be described with reference to FIGS.
This will be described with reference to FIG.

6A and 6B, L indicates the size of the document 4 and S indicates the stage 3 of the video camera 8.
H indicates the height of the imaging lens of the video camera 8 when the stage 3 is used as a reference plane, and θ indicates a predetermined angle of inclination of the arm 7 with respect to the stage 3. Further, the optical axis K of the video camera 8 is set on a vertical line passing through the center of the document 4 placed on the stage 3, and the photographing angle of the video camera 8 corresponding to the photographing size S with the optical axis K as the center. Is 2α. When the center of the document 4 is set to (0, 0) on the xy axes,
The lighting fixture mounting position (x, y) on the 0 arm 7 will be described below.

First, as shown in FIG. The photographing size S <the document original size L and tan α
= S / 2H <L / 2H, the video camera 8
The angle between the optical axis K and the line connecting the video camera 8 and the arm-side end of the shooting size S is α. In this state, a perpendicular is formed from the arm-side end of the shooting size S, and this perpendicular is drawn. A leader line having an angle α is drawn from the arm side end of the shooting size S to the arm 7 side with respect to the center, and the point at which the leader line intersects the arm 7 is the lighting fixture mounting position (x1, y1) in this case. In this case, the lighting fixture mounting position (x1, y1) is a position on the arm 7 below the center.

Here, when the lighting fixture mounting position (x1, y1) in the case of FIG. 6A is obtained, the following equations 1 and 2 are established from the drawing.

Y1 = (x1 / tanα) -H Equation 1 y1 = (− x1 × tan θ) + H Equation 2 When the simultaneous equations of Equations 1 and 2 are solved, x1 and y1 are obtained as follows. Is found.

X1 = (2H × tan α) / (1 + tan)
α × tan θ) y1 = {H × (1-tan α × tan θ)} / (1 + t
an α × tan θ) At this time, since H, tan α, and tan θ are all known values, by substituting these values, the lighting fixture mounting position (x1,
y1) can be easily obtained.

Next, as shown in FIG. Shooting size S ≧ document document size L and tan α
= S / 2H ≧ L / 2H, the video camera 8
Is an angle formed between the optical axis K and the line connecting the video camera 8 and the arm side end of the document size L, and in this state, a perpendicular line is formed from the arm side end of the document size L. Is drawn from the arm side end of the document size L to the arm 7 side, and the point where the drawn line intersects the arm 7 is the lighting fixture mounting position (x2,
y2). In this case, the lighting fixture mounting position (x2, y
2) is the lighting fixture mounting position (x1, y
This is a position above 1).

Here, when obtaining the lighting fixture mounting position (x2, y2) in the case of FIG. 6B, tan β = L / 2H
Then, the following Expressions 3 and 4 are established from the drawing.

Y2 = (x2 / tanβ) -H Equation 3 y2 = (− x2 × tan θ) + H Equation 4 When the simultaneous equations of Equations 3 and 4 are solved, x2 and y2 are obtained as follows. Is found.

X2 = (2H × tan β) / (1 + tan
β × tan θ) y2 = {H × (1−tan β × tan θ)} / (1 + t)
an β × tan θ) At this time, since H, tan β, and tan θ are all known values, by substituting these values, the lighting fixture mounting position (x2,
y2) can be easily obtained.

In the present invention, the illuminating device 10 is set in accordance with the size L of the document 4 with respect to the shooting size S of the video camera 8.
Is mounted on the arm 7, but when the lighting device 10 is mounted on the arm 7 irrespective of the size L of the document 4, there is a method of fixing it at the position shown in FIG. Although the image performance in accordance with the size L of the document 4 when the document 4 is photographed by the video camera 8 cannot be used, it can be used.

As can be seen from FIGS. 6 (a) and 6 (b), the position of the arm side end of the photographing size S and
By knowing the position of the arm side end of the document size L, the lighting fixture mounting position can be easily calculated.

Therefore, the lighting fixture mounting position on the arm 7 of the lighting fixture 10 described with reference to FIGS. 6A and 6B is calculated in advance according to the size L of the document. It is very convenient if it is placed, for example,
The result of pre-calculation of the lighting fixture mounting position according to is stored in a memory table 16 provided inside the document original input device 1 as shown in FIG. Therefore, if the document size L is selected by the document size input unit 6 a provided on the operation panel 6, the lighting fixture mounting position corresponding to the document size L is displayed on the display unit 6 b provided on the operation panel 6 from the memory table 16. Since the illuminator is displayed, the illuminator 10 may be fixed via the thumb screw 15 to the illuminator mounting position displayed on the display unit 6b while referring to the scale 7a engraved on the arm 7. At this time, the document original size L selected by the document original size input unit 6a may be a well-known paper standard size such as A3, A4, B4, or B5 indicating the size of a simple original document. What is necessary is just to store the lighting fixture mounting position based on the result calculated according to the known paper standard size.

As described above, by mounting the lighting device 10 at a position on the arm 7 corresponding to the size of the document 4,
When the document 4 is photographed by the video camera 8, the document 4
A high-quality image can be obtained in accordance with the size of the document, and the light emitted from the light source 12 in the lighting device 10 can be irradiated almost uniformly on the document 4 placed on the stage 3 without illuminance unevenness. Further, reflection of the emitted light on the video camera 8 can be prevented.

[0046]

According to the first aspect of the present invention, the arm is tilted at a predetermined angle with respect to the stage on which the document is placed. However, when the video camera is vertically mounted on the stage above the arm, the lighting device is mounted on the arm at a lighting device mounting position corresponding to the size of the document to be photographed by the video camera. When a document is photographed with a video camera, a high-quality image can be obtained in accordance with the size of the document, and the light emitted from the light source in the lighting fixture can be substantially applied to the document placed on the stage. Irradiation can be performed uniformly without illuminance unevenness, and further, reflection of the emitted light on the video camera can be prevented.

According to the second aspect, the emission direction / visible angle control member is provided in front of the light source in the lighting fixture, so that the effect of the first aspect can be more reliably obtained.

According to the third aspect of the present invention, in particular, there is provided an uneven thickness shade material which is formed from a thin portion to a thick portion gradually from the upper side to the lower side in front of the light source in the lighting device. The described effects can be obtained more reliably.

According to the fourth aspect of the present invention, the emission direction / visible angle control member is provided in front of the light source in the lighting device, and the emission direction / visible angle control member is provided from the upper side to the lower side. Since the uneven thickness shade material formed gradually from thin to thick is provided, the effect of claim 1 can be more reliably obtained.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the overall configuration of a document input device according to the present invention.

FIG. 2 is a view for explaining a configuration of the lighting device shown in FIG. 1;

FIG. 3 is a perspective view for explaining an emission direction / visible angle control member in the lighting fixture shown in FIGS. 1 and 2;

FIG. 4 is a side view for explaining the operation of the injection direction / visible angle control member.

FIG. 5 is a side view for explaining the operation when the ejection direction / visible angle control member is not used and when it is used in the document original input device according to the present invention.

FIG. 6 is a schematic diagram for explaining a lighting fixture mounting position where a lighting fixture is mounted on an arm according to the size of a document relative to a shooting size of a video camera in the document original input device according to the present invention.

FIG. 7 is a diagram for explaining a conventional document input device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Document original input device concerning this invention, 2 ... Housing | casing, 3 ... Stage, 4 ... Document original, 7 ... Arm, 10 ... Illumination equipment, 1
DESCRIPTION OF SYMBOLS 1 ... Exterior frame, 12 ... Light source (white fluorescent lamp), 13 ... Emission direction / visible angle control material, 14 ... Uneven thickness shade material.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) H04N 5/238 H04N 5/238 Z F-term (Reference) 5B047 AA01 BA02 BB06 BC12 CA19 5C022 AB15 AC74 AC78 CA07 5C072 AA01 BA17 CA09 EA08

Claims (4)

[Claims] An arm is erected at a predetermined angle with respect to a stage on which a document is placed, and a video camera is suspended above the arm toward the stage. A document input device in which a lighting device is attached to the document so that the lighting device is mounted on the arm at a lighting device mounting position corresponding to the size of the document with respect to the shooting size of the video camera. A document input device characterized by the following. 2. The document input device according to claim 1, wherein the illuminating device is provided with an exterior frame mounted on the arm, a light source provided in the exterior frame, and a light source provided in front of the light source. The emission direction of the light emitted from the light source.
A document input device comprising: an emission direction / visible angle control member for controlling a visible angle. 3. The document input device according to claim 1, wherein the illuminating device is provided with an exterior frame mounted on the arm, a light source provided in the exterior frame, and a light source provided in front of the light source. A document input device, comprising: an uneven thickness shade material that is formed from a thin portion to a thick portion gradually from an upper side to a lower side and controls the transmittance of light emitted from the light source. 4. The document input device according to claim 1, wherein the lighting device is provided with an exterior frame mounted on the arm, a light source provided in the exterior frame, and a light source provided in front of the light source. The emission direction of the light emitted from the light source.
An emission direction / visible angle control material for controlling the visible angle, and an emission direction light / visual angle control material which is provided in front of the emission direction / visible angle control material and which is formed gradually thinner from the upper side to the lower side and becomes thicker from the light source. A document input device comprising: an uneven thickness shade material for controlling light transmittance.