JPH0536556U - Label detector - Google Patents

Abstract

(57) [Abstract] [Purpose] A noise image of a label generated on a two-dimensional pattern by a label detector that detects the label position of the address description part by utilizing the difference in the paper surface level due to the difference in the paper surface color of the mail. Cut and prevent false detection of label. [Structure] Depending on whether the paper level output from the reading unit 10 is higher or lower than a predetermined reference value, 0, respectively.
The binarization to be 1 is performed by the comparator 40, and the result is A
Output to the ND gate 50. The AND gate 50 controls the output of the binarized signal of the mail output from the comparator 30 to the external device according to 0 and 4 of the output from the comparator 40, and prevents erroneous detection of the label.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a label detector, and more particularly to a label detector for detecting a label that is predesigned or attached to a mail for the purpose of addressing the mail.

[0002]

[Prior Art]

 Conventionally, this type of label detector irradiates the toilet article with light, photoelectrically converts the reflected light, and uses a comparator or the like to detect the voltage level difference between the paper surface and the label to determine the label position as a binary logical value. The position of the level was detected by binarizing the 1st level, the paper surface and other parts as the 0th level of the binary logical value.

The detection operation of the conventional label detector will be described with reference to FIG.

A label 103, which describes an address, is predesigned or attached to a part of the paper 102 of the postal matter 101. It is assumed that the label 103 is scanned by the reading unit of the optical reading device along the scanning direction L of the reading unit indicated by the arrow.

The reflected light from the scanning is photoelectrically converted into the video signal 108 of the mail.

In the video signal 108 of the mail, the level 105 of the paper surface due to the reflected light from the paper surface 102 exists on the dark level 104 as the background noise level, and normally, the white background, which has a higher reflection level than the paper surface 102, Or there is a label level 107 from a label 103 label in light tones.

The slice level 106 is appropriately set, and the label 103 and the paper surface 102 are binarized so that those exceeding the slice level are set to the binary logical value 1 and those not exceeding are set to 0. A binarized signal 109 binarized to 1, 0 is obtained.

[0008]

[Problems to be solved by the device]

 The label detection operation in the above-described conventional label detector is performed when the binarized paper surface has a dark (dark) tone and a low reflectance, as shown in FIG. Is low and the level difference D1 from the label level 107 is sufficiently large, and accurate binarization can be secured.

However, when a white type having a light color tone (bright) and a high reflectance is used, as shown in FIG. 5B, the paper level 105 becomes high, The difference D2 between the label level 107 and the paper level 105 becomes small, and it becomes difficult to perform accurate binarization conversion with the slice level 106 as a threshold value, and it is inevitable that the label detection includes erroneous detection. There are drawbacks.

The object of the present invention is to eliminate the above-mentioned drawbacks, and when the reflection level of the paper surface of a mail exceeds a predetermined value, prohibit the output of a binarized signal to prevent erroneous detection of a label. To provide.

[0011]

[Means for Solving the Problems]

 The label detector of the present invention irradiates a postal item having a label for addressing with light and detects the label based on the level difference of reflected light. Is a binarization signal representing the position of the label by binarizing each of the two with binary logic values 1 and 0 based on the level difference of the reflected light, and the level of the reflected light on the paper surface is a predetermined set value. If it exceeds the limit, it is configured to have a means for controlling so that the output is prohibited.

Further, the label detector of the present invention considers the condition for suppressing the erroneous detection of the label of the mail item and determines whether the level of the paper surface of the mail item is a binary logical value depending on whether or not the preset slice level is exceeded. It has a configuration in which it is binarized to 0 or 1 and the execution of prohibition of output of the binarized signal of the mail is controlled by the binarized output.

[0013]

【Example】

 Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention.

The embodiment shown in FIG. 1 includes a reading unit 10 of an optical reading device, an operational amplifier 20 for increasing a paper surface level of a postal matter to generate a slice level, and a comparator 40 for comparing and binarizing. The output of the comparator 30 and the output of the comparator 40 are provided with an AND gate 50 for controlling the output. FIG. 1 also shows a variable resistor 60 and a resistor R for setting the comparison voltage of the comparator 40. ..

Next, the operation of this embodiment will be described.

The reading unit 10 optically scans the paper surface of the postal matter, and outputs the video signal 108 of the postal matter and the level 105 of the postal matter due to the reflected light.

The operational amplifier 20 amplifies the level 105 on the paper surface of the mail piece so as to be suitable for binarization of the video signal 108 of the mail piece, and generates a slice level 106.

The comparator 30 binarizes the video signal 108 of the postal matter based on the slice level 106 provided from the operational amplifier 20, and classifies the paper surface portion and the label portion of the postal matter into binary signal. 1 and 0 are output as the binarized signal 109.

The variable resistor 60 adjusts the slice level that determines the output signal of the comparator 40.

The comparator 40 outputs a binary logical value 0 as a comparison result when the paper surface level 105 input from the reading unit 10 is high, and when the mail surface level 105 is low. The binary logical value 1 is output.

The AND gate 50 receives the binary signal 109 and the binary logical value 1 or 0 as the output control signal output from the comparator 40 as two inputs, and outputs the output of the binary signal 109 from the comparator 40. ON / OFF control is performed with 1, 0.

In this way, the output of the binarized signal 109 is controlled according to the darkness (darkness) and the lightness (lightness) of the paper surface of the mail, and the color tone of the paper surface of the mail is thin and the reflection level is high. When there is a high possibility of causing detection, the output of the binarized signal 109 is prohibited.

Next, the operation of this embodiment will be described in more detail with reference to FIGS. 2 and 3.

When the paper surface color of the postal matter is dark (dark), the reflection level from the paper surface is low, and the difference between the paper surface level and the label level is large.

In this case, as shown in (a) of FIG. 2, there is a sufficient level difference between the label level 107 and the paper level 105, and the slice by the slice level 106 is provided with a sufficient margin. This can be performed as in (b), and the two-dimensional image shown in (c) of FIG. 2 is obtained by reliable binarization, and accurate level detection can be secured.

On the other hand, when the paper surface of the postal matter has a light (bright) color tone, the reflection level from the paper surface is high, and the level difference between the label level 107 and the paper level 105 as shown in FIG. Becomes significantly small, a sufficient margin for the slice by the slice level 106 cannot be obtained, and accurate binarization is not performed as shown in FIG. 3B, and as a result, the binarized image is Corresponding to the incomplete binarization level of (b) of FIG. 3 becomes an incomplete binarized image in which the label part is subdivided as shown in (c) of FIG. There is a problem that the address cannot be detected.

Therefore, the comparator 40 outputs a binary logical value 1 when the paper surface level is low as in the case of FIG. 2, and is binary when the paper surface level is high as shown in FIG. The variable resistor 60 and the resistor R are adjusted so as to output a logical value 0. As a result, for a mail with a dark surface, the signal is output to the external device through the AND gate 50, but for a mail with a thin paper surface where noise may occur, The signal is blocked by the AND gate 50 so as not to be output to an external device, so that erroneous detection of the label can be prevented.

[0029]

[Effect of the device]

 As described above, the present invention utilizes the difference in the color level of the paper surface of the mail from the reading unit to distinguish between mail that does not generate noise and mail that may generate noise. The mail is output to an external device for mail that does not generate noise, and the signal is output to an external device for mail that may generate noise. By controlling so that it does not occur, there is an effect of preventing erroneous detection of the label in the postal matter in which noise easily occurs.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a label detector according to an embodiment of the present invention.

FIG. 2 is a video signal (a), a binarized signal (b) and a two-dimensional pattern (c) of the mail of dark paper color in FIG.
FIG.

3 is a video signal (a), a binarized signal (b), and a two-dimensional pattern (c) of the light-colored postal matter in FIG.
FIG.

FIG. 4 is an explanatory diagram of a label detecting operation of a conventional label detector.

FIG. 5 is a diagram showing a video signal (a) of a mail of a dark paper color and a video signal (b) of a mail of a light paper color by a conventional label detector.

[Explanation of symbols]

 10 operational amplifier 20 comparator 30 comparator 40 variable resistance 50 AND gate 60 reading unit

Claims (2)

[Scope of utility model registration request] 1. A label detector that irradiates a postal matter having a label for addressing with light and detects the label based on the level difference of the reflected light, in which the label of the postal matter and the paper surface other than the label are reflected by the reflected light. In the case where the level of the reflected light on the paper surface exceeds a predetermined set value, the binarized signal of the mail representing the position of the label is binarized by the binary logical values 1 and 0 based on the level difference. A label detector comprising means for controlling output prohibition. 2. The level of the paper surface of the postal matter is binarized into a binary logical value 0 or 1 depending on whether or not the preset slice level is exceeded in consideration of the condition for suppressing the erroneous detection of the postal matter label. 2. The label detector according to claim 1, wherein execution of prohibiting output of the binarized signal of the mail is controlled by the binarized output.