JPH01862A - information reading device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Yf) The present invention relates to an information reading device that photoelectrically reads image information of an information recording medium, such as an aperture card, using a reading element.

(Prior Art) Conventionally, an aperture card is a rectangular paper card with a film attached to a corner window, and an image taken on the film is projected onto a reading element such as a CCD and optically read. Aperture carts are often used in the field of drawing storage because of their large film size and single-sheet format.

That is, as shown in FIG. 3, the aperture cart 20 is provided with certain film frames 21, and the film F is pasted to these film frames 21 frame by frame. In these films F, as shown in the figure, there are drawing frames 22 photographed on film FJ, and a plurality of drawing frames 22 exist according to the JIS Kasa regulations based on the drawing size of one reduction ratio. Therefore, when outputting the image information on the film F to an output device such as a printer, the drawing frame 22 is first detected based on the image signal read from the film F during pre-scanning to perform automatic exposure adjustment, etc. The image is recorded on recording paper of a paper size that matches the drawing size.

(Problem to be Solved by the Invention) However, in the case of such conventional technology, unnecessary information such as a black frame outside the drawing frame may be printed on the recorded image at the same time, and as a result, the print There are problems in that the aesthetic appearance of the image is impaired and toner consumption increases.

To solve this problem, the operator uses an input device to
There is also a method for erasing the black border by inputting the frame erasing range for each frame, but with this method, the frame is erased one frame at a time, which takes a long time, and it is troublesome and time-consuming. There was a problem in that the cost was high due to the use of

Therefore, the present invention has been made to solve the above-mentioned problems of the conventional example, and its purpose is to eliminate the need for an input device and automatically remove unnecessary information outside the reading area. The purpose of the present invention is to provide an information reading device that can read information.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides an information reading device that reads image information recorded on an information recording medium using a reading element. a binarizing means for binarizing the obtained image information using a predetermined darkness value;
It is provided with a calculation means for performing a logical operation on the data obtained by the value conversion means, and is configured by extracting a reading area containing the image recording image information and deleting information other than the extracted area.

(Function) In the present invention having the above configuration, the image information of the information recording medium is read by the reading element, the read image information is binarized with a predetermined darkness value, and the z-valued data is further subjected to a logical operation. By doing so, the reading area in the image information is automatically extracted, and information other than the extracted area is deleted to avoid recording a black frame.

(Example) The present invention will be explained below based on the illustrated example. 1st
The figure is a block diagram showing one embodiment of the information recording device according to the present invention. In the figure, 20 is an aperture card as an information recording medium, and the aperture card 1" 2
0 is provided with a fixed film frame 21 as shown in FIG. 3, and a film F is attached to this film frame 21 frame by frame. Film F is a 35 mm film, on which a reduced image of the drawing is photographed, and a drawing frame 22 is present. Further, 1 is a light source that illuminates the film F.

2 is a condensing lens, 4 is an imaging lens, 5 is a CCD array sensor as a reading means, and 6 is an A/D as a binarization means.
The converter binarizes the image information of the film F read by the CCD array sensor 5 using a predetermined darkness value. 7 is a buffer memory; 8 is an external output device such as a printer or optical disk; 9 is an area detection circuit for detecting the drawing frame 22 in the image information of the film F; 10 is an output control circuit (frame erasing circuit); 11 is a A system control unit having a CPU 11a as a calculation means for performing logical operations on the binary data obtained by the A/D converter 6, and other ROMs.
1lb.

It is composed of a RAM 11c. Reference numeral 12 denotes a step motor, which transports the aperture card 2o by rotating a rubber roller or the like attached to the shaft of the motor 12. 13 is a motor drive circuit for driving the step motor 12.

In the above configuration, light from the light source 1 passes through the condenser lens 2 and projects an image on the film F of the aperture card 20 onto the CCD array sensor 5 through the imaging lens 4.

This projected image undergoes automatic exposure adjustment during pre-scanning, and at the same time, signals are processed by the A/D converter 6, area detection circuit 9 and CPU 11a, and the drawing frame 22 on the image of the film F is detected. . Then, the CPU 11a calculates an unnecessary area from the detected drawing frame 22 and sends the value to the output control circuit 10. Furthermore, during the main scan (at the time of image output), the CCD array sensor 5 again reads out the image information on the aperture card 20. At this time, A/D
The image signal from the converter 6 is output to an external output device 8 via an output control circuit 9.

That is, in this embodiment, the image of the film F on the aperture card 20 is read by the CCD array sensor 5, and this CC
The image read by the D array sensor 5 is binarized by the A/D converter 6, and this z-valued data is sent to the CPU 11a.
The drawing frame 22 on the film F is extracted by performing a logical operation on the film F, and unnecessary images outside the extracted drawing frame 22 are deleted by the output control circuit IO.

Next, the operation of the control system of this embodiment will be explained based on the flowchart of FIG. First, the step motor 12 is started in step (2), and it is determined in step (2) whether or not the CCD array sensor 5 has started to detect the drawing frame 22 of the aperture cart 1. When the drawing frame 22 starts to be detected in step (2), pre-scanning such as automatic exposure adjustment (AE) is performed in steps (2) and (2), and at the same time, the A/D converter 6° area detection circuit 9. The CPU 11a processes the signal, detects the drawing frame 22 on the film F, and ends the process. After that, C.
The PU 11a calculates an unnecessary area from the drawing frame 2z detected in step (3), and sends the value to the output control circuit 10.

Then, in step (2), the output control circuit 10 sets a constant for the unnecessary area. Next, in step (2), tree scanning (image output) is started, and the CCD array sensor 5 is
and read out the pictures at and 7w of the aperture card 20,
At this time, the image signal from the A/D converter 6 passes through the output control circuit 10, and the image signal from which unnecessary areas have been deleted is output to the external output device 2i8 (step 2). Thus, film F of aperture card 20
The drawing frame 22 in the drawing frame 22 can be automatically detected, unnecessary image information outside the drawing frame 22 can be automatically deleted,
It is now possible to efficiently remove black borders, etc. When the judgment is NO in the above steps ①, ②, ②, the step motor 12 is moved forward by several steps.

In the above embodiment, the case where the image information is read by moving the 7-perch-your-card 20 as an information recording medium is explained, but the present invention can also be applied to the case where the image information of the aperture card 2o is read by moving the reading element conversely. Of course it can be done.

(Effects of the Invention) The information reading device according to the present invention has the above-described configuration and operation, and can efficiently remove unnecessary information, especially black frames, etc., from an information recording medium, and conventionally, an operator can This made it possible to significantly reduce the work time required to erase the black borders one by one. Furthermore, there is no need for an input device for the operator to designate the range in which the black frame is to be erased, resulting in a significant cost reduction.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of an information reading device according to the present invention, FIG. 2 is a flowchart showing the operation of a control system in the embodiment, and FIG. 3 is a partial plan view of an aperture card. Explanation of symbols 5...COD array sensor (reading element) 6...A/
D converter (binarization means) 8...external output device
9... Area detection circuit 10... Output control circuit 11... System control unit 11 a-C
PU (operation f stage) 12...Step motor 20...Aperture card (information recording medium) 22.
・・Drawing frame

Claims (1)

[Claims] An information reading device that reads image information recorded on an information recording medium by a reading element, comprising a binarizing means for binarizing the image information read by the reading element using a predetermined threshold; What is claimed is: 1. An information reading device comprising: arithmetic means for performing a logical operation on the obtained data, extracting a reading area in the image information, and deleting information other than the extracted area.