JPH0343727A - Reader printer - Google Patents

Abstract

PURPOSE:To preclude cursor position misdetection due to the darkness of external light or the shadow of a person by providing a reflecting member on a cursor surface facing a read means, and judging a part which is superior in the lightness of reflected light as a cursor position. CONSTITUTION:Cursors 11 and 12 are provided on the front surface of a screen 4 and reflecting members 11a and 12a are provided on the surface facing a linear light receiving sensor 8. Then the sensor 8 detects, for example, the external light which is reflected through the reflecting members 11a and 12a to read the positions of the cursors 11 and 12. Consequently, the misdetection of the cursor positions due to the darkness of the external light or the shadow of the person is precluded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a reader printer that optically enlarges and projects an image on a microfilm or the like and reads image information by scanning the projected light.

(Prior Art) Conventionally, this type of reader printer includes, for example, a microfilm reader printer. In this doubler, the reduced image on the microfilm is focused on a screen via an imaging optical system. When printing out a formed image, first, a linear light-receiving sensor serving as a reading means is scanned by moving in a straight line at a constant speed parallel to the screen surface, and the projected image incident from the imaging optical system is read. go. The image read in this way is sent to a printer, typically an electrophotographic printer, to obtain an enlarged and reproduced image. If you want to specify a specific area of the image and, for example, obtain a partial reproduction of the image (1-rimming), the method and device for specifying that area include inputting coordinates from a digitizer or keyboard, and a screen frame. A number of methods have been proposed, including one that detects a designated area from the resistance voltage of a position sensor installed in the sensor.

(Problem to be Solved by the Invention) However, as a means of specifying an arbitrary area on a display image, inputting coordinates from a keyboard is inexpensive, but it is difficult to input coordinates by typing the coordinates while measuring the display image on the screen with a scale. Since it required manual labor, its operability was significantly inferior.

In addition, digitizers (screen-touch type) are expensive, and the cost of increasing the resolution for specifying an area increases exponentially. Naturally, the digitizer had to be placed in front of the screen, which resulted in poor visibility of the screen and a considerable sacrifice in the reader function as a league printer.

In devices that detect a specified position from the resistance voltage of a position sensor installed in the screen frame, increasing the resolution of area specification requires wider wiring for the position sensor, which may require a larger screen frame or A problem arises in that the position sensor has to be divided into several parts because of the drop in linearity.

The present invention has been made in order to solve the problems of the prior art described above, and its purpose is to specify areas of display images with high precision, at low cost, and with ease. The object of the present invention is to provide a re-dubinter.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a screen for projecting a desired image in an image recording medium, and a screen disposed movably parallel to the screen surface. In a reader printer equipped with a cursor and a reading means for reading a projected image by scanning the projected light on the screen, a reflecting member is provided on the cursor surface facing the reading means, and the reading means is reversed. It is characterized by reading the reflected light by the reflecting member.

Note that it is effective to provide a light emitting member that is movable together with the reading means.

It is also desirable to form the light emitting member so that it can be divided into parts and emit light.

Furthermore, it is effective that the light emitted by the light emitting member is reflected by the reflective member so that the light enters the reading means when the cursor and the reading means face each other.

Furthermore, it is effective to use a light-emitting member instead of the reflective member.

Further, it is desirable to form a light-emitting member instead of the light-emitting member so that it can be divided into parts and emit light.

(Function) In the present invention having the above configuration, by providing a reflective member on the cursor surface facing the reading means, the strength of the amount of reflected light is detected by the reading means, and the position of the cursor is determined based on the amount of reflected light. Detect.

Note that by providing a light emitting member that is movable together with the reading means and irradiating the reflecting member with light from the light emitting member, it is difficult to be affected by external light.

By forming the light emitting member so that it can emit light in sections, the reflection position on the cursor can be set as a point.

Further, by reflecting the light from the light emitting member so that it enters the reading means when the cursor and the reading means are directly opposed, the cursor position can be directly detected without the need to correct the reflection position.

Furthermore, by providing a light emitting member in place of the reflecting member and configuring the reading means to detect the light emitted from the light emitting member, the path of light incident on the reading means can be shortened, and therefore the amount of light incident on the reading means can be reduced. can prevent the attenuation of

By forming a light emitting member in place of the reflective member so as to be able to emit light separately, the light emitting position on the cursor can be set as a point.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. FIG. 4 is a configuration diagram showing a microfilm reader printer according to the present invention.

In the figure, a reduced image of a roll-shaped microfilm 2 illuminated by an illumination lamp 1 is magnified by an imaging lens 3 constituting an imaging optical system and focused on a screen 4. 1st
The reflecting mirror 5 and the second reflecting mirror 6 are used to make the device compact by bending the enlarged optical path.

The light-receiving elements 7 are arranged on a linear light-receiving sensor 8 as a reading means in a direction perpendicular to the scanning direction indicated by an arrow M, and each element forms a pixel of a digital image.

On the front of screen 4 (operator side), cursor 1
1.12 are provided, and each surface facing the linear light receiving sensor 8 is provided with reflecting members 11a and 12a. In the present invention, for example, external light reflected through the reflecting members 11a and 12a is detected by the linear light receiving sensor 8, and the position of the cursor 11, 12 is read (referred to as pre-scanning). Note that the reflective member 11a,
Examples of the material 12a include a mirror, a metal whose surface is mirror-finished, or a foil material such as gold or silver.

Further, as shown in FIG. 1, a lamp 21 as a light emitting member is provided which is movable together with the linear light receiving sensor 8, and the light from the lamp 21 is detected by the linear light receiving sensor 8 via the reflecting members 11a and 12a. It can also be configured as The reflecting members 11a and 12a have reflection angles such that the light from the lamp can be detected by the linear light receiving sensor even if the cursor and the linear light receiving sensor are at the same height and directly facing each other. In this case, even if the external light changes, the cursor 1 will remain stable.
1.12 positions can be detected.

In the configuration shown in FIG. 1 described above, the beam of light carrying image information on the microfilm 2 is projected toward the screen 4. Furthermore, the linear light receiving sensor 8 is at the home position and is waiting for an operation switch (not shown) to be pressed. For example, when specifying an area for partial copying of an image projected on the screen 4, surround the area with the cursors 11 and 12, and then turn on a copy switch (not shown). Pre-scanning is performed in the direction of arrow M with the light receiving element 7 facing the screen 4 side. At the same time, the lamp 21 emits light at a predetermined brightness. At this time, the light emitted from the lamp 21 passes through the screen 4 at a position where the cursor 11 or 12 is not present.

However, when the linear light receiving sensor 8 comes to the position of the cursor 11 or 12, the light from the lamp 21 is reflected by the reflecting members 11a and 12a provided on the cursors 11 and 12, respectively, and reaches the light receiving element 7.

Here, an example of detection data of cursor reflected light is shown in FIG. In the figure, the horizontal axis represents the position to which the linear light receiving sensor 8 has moved, and the vertical axis represents the brightness on the screen side where the light is received. Since outside light is generally not a stable light source, it is very difficult to detect its characteristics, but the light that passes through the screen 4 is scattered light, so there are no high brightness or particularly dark places.

Therefore, the detected brightness is detected with a change in low frequency. However, when there are reflective members 11a and 12a very close to the screen 4, the influence of scattered light is small and the brightness rises rapidly. That's cursor 11
．． If it is thin like 12, the rises A and B will be pulse-like. In other words, if we analyze Figure 2, we can see that the gradual change in brightness with respect to position is due to changes in the brightness of outside light (for example, due to light from fluorescent lights), and the two peaks A and B are at cursor 11 and 12. It turns out that it's the location.

The data of the partial copy area obtained by this pre-scanning, that is, the area surrounded by the cursor 11, 12, is recorded in a memory (not shown). After the pre-scanning is completed, the linear light receiving sensor 8 is turned 180 degrees to face the light beam (indicated by a broken line in FIG. 4), and in order to read the projected image of the microfilm 2, Perform the main scan to.

Note that if the lamp 21 is formed to be able to emit light in segments, it is possible to specify an area in the scanning direction as well as in a direction perpendicular to the scanning direction.

FIG. 3 shows an example in which cursors 11 and 12 are provided on the inner surface of the screen 4. In the above embodiment, since the cursors 11 and 12 are provided on the outer surface of the screen 4, a triple reduction in the amount of light cannot be avoided: [screen transmission-reflection-screen transmission]. On the other hand, in this embodiment, since the reflected light from the lamp 21 can be directly received, the amount of light from the lamp is small, and the position detection error due to the diffusion characteristics of the screen 4 is also small, so that more accurate area specification can be performed.

FIG. 5 shows another embodiment of the present invention, 3132
are light emitting members provided for each of the cursors 11 and 12.

In the embodiment described above, a lamp 2 that moves together with a linear light receiving sensor 8 is provided, and the cursors 11 and 12 simply return the reflected light. Instead of this, in this embodiment, the cursor 11.1
2 itself to emit light. Note that the light emitting member 3
1.32 may be a lamp of various types, such as an LED.

In the above-mentioned method of returning reflected light, the light from the lamp 21 passes through the screen 4 five times, and is further reflected by the reflecting members 11a and 12a with a reflection efficiency of less than 100%, resulting in a triple reduction in the amount of light. Resulting in. Therefore, the amount of light emitted from the lamp 21 is required to be quite high.

On the other hand, in this embodiment, since the cursor 11.12 itself is provided with the light emitting members 31.32, the amount of light emitted can be used effectively.

FIG. 6 shows an example of a plurality of two-dimensional screen-side illuminance data. In the above-mentioned Figure 2, data obtained from one bit of the light receiving element is shown, but by taking data from multiple bits and arranging them in a map shape as shown in Figure 6, area detection is possible. Accuracy will further increase. In addition, in the same figure,
The X-axis represents the main scanning direction of the linear light-receiving sensor 8 (the arrangement direction of the light-receiving elements 7), the Y-axis represents the sub-scanning direction (arrow M direction), and the Z-axis represents the brightness on the screen 4 side detected by the linear light-receiving sensor 8. shows.

As shown in the figure, in addition to the brightness distribution (outside light distribution) due to the entire undulating curved surface, mountain range-like peaks A and B can be seen at two locations in the Y direction. Furthermore, the vertices of peaks A and B all show approximately constant values. Therefore, even if there is a possibility of false detection when measuring one point, it is sufficient to detect a position where adjacent bits (in the main scanning direction) output the same data.

Further, as shown in FIG. 7, by dividing the light-emitting portion of the cursor 1112, it is possible to specify not only a vertical area but also a horizontal area, so that area specification can be performed from both directions.

In FIG. 7, for example, the light emitting member 31 is divided into 16 parts.
32 is provided for each of the cursors 11 and 12, and when specifying the region [mD, 11 in the projected image, the two points of the 10th light emitting member 31a of the cursor 1 and the 15th light emitting member 32a of the cursor 12 are set. Light is emitted, and a rectangle with these two points as vertices is designated as an area. Of course, the number of divisions of the light emitting members 31 and 32 can be arbitrarily set as required. Note that the light emitting members 31 and 32 of each of the cursors 11 and 12 can be detected by the linear light receiving sensor 8 if they emit light only on the screen side, or they may emit light on both sides so that the operator can easily recognize the designated area. .

Further, the cursor 11.1 equipped with the light emitting member 3132
2 may be provided on the inner surface of the screen 4.

(Effects of the Invention) The present invention has the above-described configuration and operation, and by providing a reflective member on the cursor surface facing the reading means, a portion with excellent brightness of reflected light can be determined as the cursor position. This prevents misdetection of the cursor position due to poor external light or human shadows. Moreover, by following the conventional method of specifying an area using a cursor, there is an advantage that the device can be configured at low cost.

Furthermore, by providing a movable light emitting member together with the reading means and irradiating the light from the light emitting member onto the reflecting member, stable reflected light can be obtained based on a known amount of light emitted, and the brightness of the outside light can be adjusted. It becomes possible to detect the cursor position with high precision without being influenced by any influence.

By forming the light-emitting member so that it can emit light in parts, the reflection position on the cursor can be set as a point, and the coordinate position on the cursor can be detected as well as the cursor placement position. Two-dimensional area specification becomes possible.

Furthermore, by reflecting the light emitted by the light emitting member by the reflecting member so that the light enters the reading means when the cursor and the reading means face each other directly, there is no need to correct the read reflection position, and the cursor position can be directly determined. Can be detected. Therefore, no arithmetic processing is required, and the cursor position can be quickly recognized.

Furthermore, by providing a light emitting member in place of the reflecting member and configuring the reading means to detect the light emitted from the light emitting member, the path of light entering the reading means can be shortened, and the light entering the reading means can be shortened. Attenuation of the amount of incident light can be prevented. Therefore, the amount of light emitted by the light emitting member can be effectively utilized.

By forming the light-emitting member instead of the reflective member so that it can be divided and emitted freely, the light-emitting position on the cursor can be set as a point, and the coordinate position on the cursor can be detected as well as the cursor placement position. It becomes possible to designate two-dimensional areas in areas that are not in contact with .

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing a reader printer according to an embodiment of the present invention, FIG. 2 is a characteristic diagram showing an example of illuminance data on the screen side in FIG. 1, and FIG. FIG. 4 is a diagram showing a configuration example of a microfilm reader printer to which the present invention is applied, and FIG.
The figure is a block diagram showing a reader printer according to a second embodiment of the present invention, FIG. 6 is a characteristic diagram showing an example of illuminance data on the screen side in FIG. 5, and FIG. It is a figure showing an example of composition. Explanation of symbols 4...Screen 8...Linear light receiving sensor (reading means) 1112...Cursor 11a, 12a...Reflecting member 21...Lamp (light emitting member) 31.32...Light emitting member ＼ Figure 2 ff Figure 4 Lid Figure 6

Claims (6)

[Claims] (1) A screen for projecting a desired image on an image recording medium, a cursor movably disposed parallel to the screen surface, and a reading means for reading the projected image by scanning the projected light onto the screen. A reader printer comprising the following: A reflective member is provided on a cursor surface facing the reading means, and the reading means is reversed to read light reflected by the reflective member. (2) The reader printer according to claim 1, further comprising a light emitting member that is movable together with the reading means. (3) The reader printer according to claim 2, wherein the light emitting member is formed to be able to emit light in sections. (4) The reader printer according to claim 2 or 3, wherein the light emitted from the light emitting member is reflected by the reflecting member so that the light enters the reading means when the cursor and the reading means face each other. (5) The reader printer according to claim 1, further comprising a light emitting member in place of the reflective member. (6) A reader printer characterized in that the light emitting member according to claim 4 is formed to be able to emit light in sections.