JPS6111715Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a boundary line extraction imaging exposure apparatus.

With the development of aerial photography in recent years, the use of the photographs has spread to a wide range of fields. Most of the topographic map creation and various natural environment surveys are carried out using satellite photographs. Generally, in remote sensing images, there are many lines that indicate geological and geographical features such as water systems and faults. In the field of geology, edge enhancement processing has become popular in order to objectively extract such linear geological structures. Edge enhancement processing refers to a technique that extracts or erases only linear features from black-and-white continuous tone images such as photographs. A tone line method is known in which a line drawing is obtained by superposing oblique light rays at intervals. The principle of this tone line method is to create a negative film (original photograph) 1 with continuous tone and a positive film (mask) 2 with the same tone as shown in Figure 1 of the attached drawings. When the images are superimposed and light 3 is applied from a 45° direction, the light passes through the gap due to the thickness of the film base and is printed onto the photosensitive material 4. In this case, the areas other than the border of the image have different gradations between the positive and negative. By canceling each other out, only the border portion is printed in a linear form, creating a line positive image that is a border line extraction image of the original photograph. The conventional methods of printing this line positive are:
As shown in FIG. 2 of the accompanying drawings, there is a method in which the document is fixed on the document table 5 and the light source 6 is rotated, and a method in which a fixed light source 7 is used and the document table 8 is rotated as shown in FIG. be. However, these conventional methods use a point light source as a light source, so exposure is not uniform across the entire document;
It tends to cause blurring, and since it requires scanning the exposure point over the entire surface of the document, it takes a long time to create a single line positive. Ta.

In view of the above-mentioned problems, the purpose of this invention is to provide a boundary line extraction imaging exposure method for extracting density conversion points of continuous tone images and converting them into line drawings in a short time without causing blurring and with high resolution. The purpose is to provide equipment.

The boundary line extraction imaging exposure device according to the present invention includes a document photo holder that can place a document photo and rotate within a plane, and an angle of 45 degrees from both left and right with respect to the plane of the document photo. a light source unit that generates a linear light velocity that enters at The present invention is characterized by comprising a control section for rotating the pedestal by a predetermined angle.

Next, the present invention will be described in detail with regard to embodiments of the present invention based on FIGS. 4 and 5 of the accompanying drawings.

FIG. 4 is a schematic diagram showing, in longitudinal section, a boundary line extraction imaging exposure apparatus as an embodiment of the present invention. At the bottom of the apparatus frame 10, an original photo holder 11 is arranged, on which an original photo to be converted into a line drawing can be placed and rotated within the plane of the original photo. This original photo holder 11 is provided with a compression glass 11A for compressing the original photo. ) etc., it is designed to be rotated 360 degrees by a predetermined angle. At the top of the device frame 10, a light source section 12 is provided.
A light source scanning pedestal 13 is disposed to support the light source so as to be able to reciprocate along the plane of the original photo pressed onto the original photo holder 11. This light source scanning pedestal 13 includes a rail member 13 extending left and right.
A, and a trolley 13B runs on this rail member 13A.
can be moved back and forth from side to side by pulley 13C and belt 13D. Trolley 13
It is attached to the bottom of B and arrow A is attached to the trolley 13B.
As clearly shown in the enlarged detailed view of FIG. A light box 121 that extends linearly over the area and has slits 121A and 121B in the left and right directions at 45 degrees, a fluorescent lamp 122 disposed within this light box 121, and a luminous flux from each of the slits 121A and 121B. Column lenses 123A and 123B for parallel light flux
Furthermore, a light amount adjustment slit 12 is provided.
4A and 124B. Linear parallel light beam 1 passing through slits 124A and 124B
As shown in FIG. 4, the beams 25A and 125B are designed to be incident on the plane of the original photo on the original photo holder 11 from both left and right directions at an angle of 45 degrees.

Two microswitches 131 and 132 are provided near both left and right ends of the rail member 13A, respectively. The micro switch 131 turns on the fluorescent lamp 1 when it is operated to cause the cart 13B to move back and forth by an operating piece 133 provided on the cart 13B.
Signal for deactivating 22 and original photo mount 11
A signal is sent to the control unit 20 to start rotational drive at a predetermined angle, and furthermore,
This microswitch 131 is configured to send a signal for energizing the fluorescent lamp 122 and a signal for stopping the rotation of the original photo holder 11 to the control unit 20 when it is activated during the backward movement of the trolley 13B. It's getting old. In addition, the micro switch 132
is adapted to send a signal to the control unit 20 for reversing the moving direction of the truck 13B when actuated by an actuating piece 133 provided on the truck 13B.

The overall operation of the exposure apparatus having such a configuration will be described below. First, an unexposed film, a negative film of the original photograph, and a positive film of the original photograph are stacked on the original photograph holder 11, and the pressure film 1 is placed on top of the original photographic film.
Compress using 1A. Assuming that the trolley 13B is now near the right end in FIG. The trolley 13B is moved to the left via the belt 13D, and accordingly, the light source section 12 is also moved to the left. At this time, two linear parallel light beams 125A and 1
With 25B, both left and right directions for the original photo 45
Exposure will be made at a certain degree. At the end of one exposure scan in the predetermined angle direction, the carriage 13
When B reaches near the left end and the micro switch 131 is actuated by the actuation piece 133, the fluorescent lamp 1
Signal for deactivating 22 and original photo mount 11
A signal for starting rotational drive of a predetermined angle is sent to the control unit 20, and in response to these signals, the control unit 20 turns off the fluorescent lamp 122 and rotates the original photo holder 11 by a predetermined angle. do it like this. Furthermore, when the trolley 13B moves to the left and the micro switch 132 is actuated by the operating piece 133, a signal for reversing the moving direction of the trolley 13B is sent to the control section 20, and the control section 20 , in response to this signal, pulley 13C is rotated in the opposite direction, reversing the movement of truck 13B so that truck 13B now moves to the right. Then, when the micro switch 131 is actuated by the actuating piece 133, a signal is sent to energize the fluorescent lamp 122 and the original photo holder 1
A signal for stopping the rotational drive of the controller 2 is sent to the controller 2.
In response to these signals, the control section 20 turns on the fluorescent lamp 122 and turns on the original photo holder 11.
The rotation is stopped and the angular position is fixed at a predetermined angle from the previous angular position. In this state, when the light source section 12 moves to the right, two linear parallel light beams 125 from the light source section 12
A and 152B will expose the original photo at 45 degrees in both left and right directions, but since the original photo has been rotated by a predetermined angle from the previous scan, the scanning direction of this exposure will be the same as the previous scanning direction. The direction is shifted by the predetermined angle.
When the carriage 13B reaches near the right end at the end of this exposure scan, the original photo holder 11 is further rotated by a predetermined angle by the operation of the micro switches 131, 132 and the control section 20, as described above. The moving direction of the light source section 12 is reversed,
The next exposure scan will be performed. In this way, exposure scanning is automatically performed until the original photo holder 11 is rotated 360 degrees. Then, when the original photo holder 11 is rotated 360 degrees, printing of the line image of the original photo is completed.

In this case, the amount of exposure can be adjusted by adjusting the speed of reciprocating motion of the light source section 12, the exposure time, and the widths of the slits 124A and 124B.

In the embodiment described above, one fluorescent lamp 122 to two
The light source section is configured to obtain two linear parallel light beams 125A and 125B, but the present invention
The present invention is not limited to this, and linear parallel light beams may be obtained separately from separate fluorescent lamps. However, it is preferable to obtain two linear parallel light beams from one fluorescent lamp, as in the light source section of the above-described embodiment, because it is easy to match the characteristics of the two linear parallel light beams.

As described above, the apparatus of the present invention can completely automatically perform exposure scanning over the entire surface of an original photograph, so that a line image can be obtained from a continuous tone image very easily and in a short time. In addition, since the device of the present invention performs exposure using a linear parallel light beam, the entire surface is exposed uniformly and exposure distortion (unevenness) is avoided.
This can improve the resolution of the line drawing.

[Brief explanation of the drawing]

FIG. 1 of the accompanying drawings is a diagram for explaining the principle of the tone line method, FIGS. 2 and 3 are schematic diagrams showing examples of conventional devices for implementing the tone line method, and FIG. 4 is a diagram showing one example of a conventional device for implementing the tone line method. FIG. 5 is a schematic vertical cross-sectional view showing a boundary line extraction imaging exposure apparatus as an embodiment, and FIG. 5 is a detailed view of the light source section of the apparatus shown in FIG. 4. 10...Device frame body, 11...Document photo mount, 1
2...Light source section, 13...Light source scanning mount, 20...
...Control unit, 121...Light box, 121
A, 121B...Slit, 122...Fluorescent lamp,
123A, 123B...Column lens, 124A,
124B...Slit for adjusting light amount, 125A, 1
25B...Linear parallel light flux, 13A...Rail member, 13B...Dolly, 13C...Pulley, 13D
... Belt, 131, 132 ... Micro switch, 133 ... Actuation piece.

Claims (1)

[Claims for Utility Model Registration] (1) A boundary line extraction imaging exposure device for extracting density conversion points of a continuous tone image and converting it into a line drawing,
an original photo holder that can place a photo of the original and rotate within the plane of the photo of the original, and a light source that generates a linear light flux that is incident at an angle of 45 degrees from both left and right directions with respect to the plane of the photo of the original. a light source scanning mount supporting the light source so as to be able to reciprocate along the plane of the original; and a light source scanning mount for rotating the original photo mount by a predetermined angle each time the light source unit scans the plane of the original. What is claimed is: 1. A boundary line extraction imaging exposure apparatus, comprising: a control section. (2) The light source section includes a light box having slits facing each other at 45 degrees to the left and right, a fluorescent lamp arranged within the light box, and a conventional structure for converting the speed of light from each of the slits into a parallel light beam. A boundary line extraction imaging exposure apparatus according to claim (1) of the claimed utility model registration, comprising: a lens;