JPS5999578A - Mark reader - Google Patents

Abstract

PURPOSE:To improve the capability for a mark read by varying various parameters of a mark shape, mark size, noise decision level, etc., by an indication from an operator. CONSTITUTION:The operator confirms parameters regarding the mark read which are registered for every form before the mark read starts. Those parameters are sensitivity for determining a threshold level in quantization (a), a processing method (determined by the area of a maximum block, determined by the total area of respective blocks, rejection, etc.) when a mark is divided into two blocks (b), the maximum and minimum longitudinal and lateral dimensions and area of a mark frame, shape, etc., (c). When those parameters are varied, the operator inputs variation information on a keyboard which is not shown in a figure. Thus, the precision of decisions on the mark and rejection is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a mark reading device, and more particularly to a mark reading device suitable for expanding mark reading capability and range of application.

[Technical background of the invention and its problems]

Conventionally, in mark reading devices widely used in form management systems, boss systems, etc., the only parameter that can be set or controlled from the outside for mark B reading is a sensitivity switch at most. For example, the mark shape, mark size 1, noise determination level, etc., had to be set in a fixed manner. For this reason, there is a problem in that the degree of freedom in reading marks is restricted and the method cannot be applied to various forms and marks.

[Purpose of the invention]

Therefore, the object of the present invention is to solve the above problems of the prior art by +1
To provide a mark reading device which allows an operator to easily set or control various parameters such as erasure, mark shape, mark size, noise determination level, etc., and which enables expansion of mark reading capability.

[Summary of the invention]

To achieve the above object, the present invention includes means for setting various parameters related to mark reading, means for optically reading marks and converting them into image patterns, and processing the image patterns according to preset parameters. The present invention provides a mark reading device 1''f, which includes processing means for determining the presence or absence of a mark and determining whether the mark is rejected.

[Embodiments of the invention]

Hereinafter, the present invention will be described in detail with reference to the drawings.

The drawing is a block diagram of a mark reading device according to an embodiment of the present invention. In the figure, a photoelectric conversion section optically captures the mark on the form, converts it into an electrical signal, and sends it to the image buffer section 2. The image buffer section stores the document image read by the photoelectric conversion section)/
It has the function of accumulating the entire sheet as multi-value data. The quantization circuit 5 quantizes the area corresponding to the mark frame from among the image data from the image buffer section. The inspection section 6 performs skew correction on the quantized data of one quantization circuit S, and cuts out the mark removal area. The noise cut circuit 7 removes minute noises and isolated noises from the data from the inspection section 6.

The determination circuit compares the number of blocks, block rise, etc. of the read pattern that has undergone noise removal with parameters set in advance, and determines whether the mark is 1, 1, 1, 2, or 3. The interface part is 0FIT/
/、External control rack @1 that sets the keyboard 12
0 via an interface line. The control section 3 sends the control section to the photoelectric conversion section, image buffer section, and quantization circuit S, and also sends the glare data from the judgment circuit to the external control device lθ via the interface section. have

Is there any external control in the formation of lF'? The interface line 9 receives the command from the interface line 9, and the control section 3 controls the form conveyance section (not shown), and converts the form using the optical ν■ conversion section. A scanning reading of the image is performed. As a result of such scanning, the form image optically read by the photoelectric conversion section/is converted into an electrical signal, and sent to the image buffer section 2 and stored therein. The image buffer section stores the entire sheet/autumn equinox of the form image as multivalued data. Next, the quantization circuit 5 quantizes the deviated portion of the data in the image buffer section a corresponding to the leading edge of the form, and by observing the inclination of the leading edge, the control unit 3 determines the skew angle of the form. Revise one word. Based on the skew angle obtained as a result of this illγ, the inspection section B sets a position on the image buffer section that corrects the position information of the mark frame given before 41, which corresponds to the mark frame after the null correction. The area is taken in via the quantization circuit 5.

Note that, prior to starting mark reading, the operator checks the parameters related to mark reading registered for each form, and changes the parameters if necessary. Here, the following can be considered as the contents of the parameters.

(1) Sensitivity for determining the threshold level when converting to M children (2) Processing method when divided into marks or co-blocks a.
Determined by the area of the largest block, determined by the total area of each block C, Reject (3) Minimum and maximum vertical and horizontal sizes and areas of the mark frame,
Shape (G) In addition, the information listed above is set to the external control 141 position /θ from the keyboard /2 before reading and taking the mark.
The information is loaded into the control unit 3 in advance via the interface unit q. As a result, the image pattern in the area corresponding to the mark frame is quantized by the quantization circuit j based on the sensitivity given in advance, and is taken into the memory in the inspection section 6.

The data stored in the inspection section B has minute noises and isolated noises removed by the noise cut circuit 7, and is sent to the determination circuit g. In the determination circuit g, the number of blocks of marks, the vertical and horizontal sizes of each block, and fI''+48 are measured and compared with preset parameters to determine whether there is a mark or not or whether there is a defect. The data π1' read in this way is sent from the control unit 3 to the external control cabinet z11/θ via the interface unit q and the interface line t, where data checking, editing, etc. are performed.

First, each 111
- Since it is possible to freely set the degree, shape, size, etc. of the mark to be read for each vote, the degree of freedom in mark correction and removal can be greatly improved.

In addition, in addition to data reliability 1, it is possible to adjust the state of the device slightly N''A in the direction of picking up marks or, conversely, in the direction of picking up only complete marks. (It is possible to increase the reliability of uJ. On the other hand, since the parameter Ushimae ゛ζ is available for uJ, reading execution 111
(2) Parameter settings: Sometimes, parameters can be set (II) to read thin or small marks according to the data of the job.

In the above embodiment, the image buffer section is exemplified as having a size of 47", which stores the image of the entire document/sheet as multi-value data, but the scope of the present invention is limited to this. It may be possible to store images of /color or /color instead of images, or to store images as binarized data.Furthermore, in the above embodiment, OFT/ The key fob 7.2 is connected via an interface liner to an external control numeral 10 that provides 1!i+i. ?': l'It's okay to make it (・Of course.

〔Effect of the invention〕

As described above, the present invention has a high degree of flexibility in adapting to various types of forms, is capable of reading marks with high 4G requirements, and is also capable of improving the efficiency of office processing by reducing mark curvature by R5 (1). Therefore, it is possible to carry out an effective mark n"fe removal j+4.

[Brief explanation of the drawing]

The drawing is a block diagram of a mark reading/taking device according to an embodiment of the present invention. /... Light t(J', conversion unit, λ... Image buffer unit, 3... Control PdS, l... Interface unit, S... Skeletonization circuit, 6... Inspection unit , 7... Noise cut circuit, g... Judgment circuit.

Claims (1)

[Claims] means for setting various parameters related to mark reading; means for optically reading the mark and converting it into an image pattern; and processing means for processing the image pattern according to preset parameters to determine the presence or absence of the mark and whether it is rejected. A mark reading device characterized by being able to read (+ii+).