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GA/T 1690.6-2019: Forensic sciences--Examination methods for seal stamps -- Part 6: Drawing lines and comparison
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GA/T 1690.6-2019 | English | 139 |
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Forensic sciences--Examination methods for seal stamps -- Part 6: Drawing lines and comparison
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GA/T 1690.6-2019
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Basic data | Standard ID | GA/T 1690.6-2019 (GA/T1690.6-2019) | | Description (Translated English) | Forensic sciences--Examination methods for seal stamps -- Part 6: Drawing lines and comparison | | Sector / Industry | Public Security (Police) Industry Standard (Recommended) | | Classification of Chinese Standard | A92 | | Classification of International Standard | 13.310 | | Word Count Estimation | 6,629 | | Date of Issue | 2019-10-14 | | Date of Implementation | 2019-12-01 | | Issuing agency(ies) | Ministry of Public Security | GA/T 1690.6-2019: Forensic sciences--Examination methods for seal stamps -- Part 6: Drawing lines and comparison
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Forensic sciences--Examination methods for seal stamps - Part 6.Drawing lines and comparison
ICS 13.310
A92
Public Safety Industry Standards of the People's Republic of China
Forensic Science Seal Seal Test
Part 6.Line drawing comparison method
Published on October 14,.2019
2019-12-01 Implementation
Issued by the Ministry of Public Security of the People's Republic of China
Foreword
GA/T 1690 "Forensic Science Seal Seal Test" is divided into 6 parts.
---Part 1.Microscopic inspection method;
---Part 2.Coincidence comparison method;
---Part 3.Detailed feature comparison method;
---Part 4.Measurement comparison method;
---Part 5.Splicing comparison method;
---Part 6.Line drawing comparison method.
This part is part 6 of GA/T 1690.
This section was drafted in accordance with the rules given in GB/T 1.1-2009.
This part is proposed by the National Criminal Technology Standardization Technical Committee Document Inspection Sub-Technical Committee (SAC/TC179/SC10) and
Be in charge.
This section was drafted by. Tianjin Public Security Bureau, Tianjin People's Procuratorate, Physical Evidence Appraisal Center of Ministry of Public Security, Zunyi Public Security Bureau.
The main drafters of this section. Yu Jianmin, Xu Lu, Yan Haiqian, Zhang Yazhuo, Hou Jianzhong, Zhao Yuanxiang.
Forensic Science Seal Seal Test
Part 6.Line drawing comparison method
1 Scope
This part of GA/T 1690 stipulates the method specification for checking seals in the forensic science field.
This section applies to the inspection of seals and seals in the field of forensic science.
2 Equipment
Copier, scanner, ruler, compass, graphics (image) processing software with line drawing function, document inspection instrument, etc.
3 Inspection
3.1 Copy the seal
3.1.1 Copy method
Copying, scanning, photographing and other methods can be used to copy the inspection seal and sample seal under the same conditions.
3.1.2 Copy requirements
The copy should clearly reflect the characteristics of the test material seal and sample seal.
3.2 Line drawing of copies
For the printed copy of paper, you can use a ruler, compass and other tools to draw the line; for the printed image format, you can use the software's line drawing tool
With line drawing.
3.2.1 The method of drawing lines
The line drawing should try to pass through the parts with more graphics and text.The methods of drawing lines include.
a) Straight line drawing method. select some clear feature points in the printed text, and connect any two points.
b) Concentric circle line drawing method. Select any clear feature point in the printed text, use this point as the center of the circle, and draw a circular arc line with the unit length as the radius.
3.2.2 Line drawing comparison
Select where the straight line (or arc) between the same two points in the comparison seal passes the seal, and the relative position of the seal pattern and the drawn line
relationship.
4 Make inspection records
Record the comparison test result of line drawing in the inspection record. If necessary, you can place the thin line where the drawn line or arc crosses the seal
The picture of section shape, relative position and text description.
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