JPS5580181A - Waveform shaping system in label reader - Google Patents
Waveform shaping system in label readerInfo
- Publication number
- JPS5580181A JPS5580181A JP15529878A JP15529878A JPS5580181A JP S5580181 A JPS5580181 A JP S5580181A JP 15529878 A JP15529878 A JP 15529878A JP 15529878 A JP15529878 A JP 15529878A JP S5580181 A JPS5580181 A JP S5580181A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- differentiated
- primary
- bar code
- square
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Character Input (AREA)
Abstract
PURPOSE: To obtain a square wave signal which rises and trails correspondingly to a bar code, by subjecting a photo-electric conversion signal to primary and secondary differentiations and combining these primary and secondary differentiated signals to obtain the peak point of the primary differentiated signal.
CONSTITUTION: Photo-electric conversion signal (b) obtained by scanning bar code (a) is differentiated to obtain primary differentiated signal (c). This signal (c) generates a peak position at the inflection point in the half-tone section of leading and trailing parts of signal (b). Next, signal (c) is further differentiated to obtain secondary differentiated signal (d). Next, the positive part of signal (c) and the negative part of signal (d) are subjected to AND operation to obtain the positive peak point of signal (c), namely, leading of square signal (e). Meanwhile, the negative part of signal (c) and the positive part of signal (d) are subjected to AND operation to obtain the negative peak point of signal (c), namely, trailing of square signal (e). This signal (e) is an accurate square wave signal corresponding to the bar code.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15529878A JPS5580181A (en) | 1978-12-13 | 1978-12-13 | Waveform shaping system in label reader |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15529878A JPS5580181A (en) | 1978-12-13 | 1978-12-13 | Waveform shaping system in label reader |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5580181A true JPS5580181A (en) | 1980-06-17 |
Family
ID=15602830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15529878A Pending JPS5580181A (en) | 1978-12-13 | 1978-12-13 | Waveform shaping system in label reader |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5580181A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001357347A (en) * | 2000-04-26 | 2001-12-26 | Ncr Internatl Inc | Method and device for digitizing and processing analog bar code signal |
| WO2012002335A1 (en) * | 2010-06-30 | 2012-01-05 | 株式会社オプトエレクトロニクス | Decoding method and decoding processing device |
-
1978
- 1978-12-13 JP JP15529878A patent/JPS5580181A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001357347A (en) * | 2000-04-26 | 2001-12-26 | Ncr Internatl Inc | Method and device for digitizing and processing analog bar code signal |
| WO2012002335A1 (en) * | 2010-06-30 | 2012-01-05 | 株式会社オプトエレクトロニクス | Decoding method and decoding processing device |
| US9262665B2 (en) | 2010-06-30 | 2016-02-16 | Opticon Sensors Europe B.V. | Decoding method and decoding processing device |
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