Ab8000Hs Quantitative Handwriting Examination System Questioned Document
Ab8000Hs Quantitative Handwriting Examination System Questioned Document
DeHao AB8000|Handwriting Quantitive|kinematics of handwriting|Pressure Analysis|Printer Identification HD International QDE DeHao AB8000|Handwriting Quantitive|kinematics of handwriting|Pressure Analysis|Printer Identification HD International.
3D Bar displays Pen Pressure Distribution diffs
DeHao AB8000|Handwriting Quantitive|kinematics of handwriting|Pressure Analysis|Printer Identification HD International QDE DeHao AB8000|Handwriting Quantitive|kinematics of handwriting|Pressure Analysis|Printer Identification HD International.
DeHao AB8000|Handwriting Quantitive|kinematics of handwriting|Pressure Analysis|Printer Identification HD International QDE DeHao AB8000|Handwriting Quantitive|kinematics of handwriting|Pressure Analysis|Printer Identification HD International.

AB8000HS Quantitative Handwriting Examination System


 

AB8000 is a pioneering instrument with focus variation microscopy technique and image processing technology to assist forensic document examiners to extract handwriting features by analyzing the degree of variation in pen pressure, tilt angle and ink distribution. All of this data could be used to illustrate the characteristics of the signature with quantitative data, which is described in word description with the examiner's subjective experience in the traditional way. Besides, quantitative analysis could also allow forensic document examiners to analyse complex signatures such as those with few strokes or those with high levels of simulation.

Application

Forensic 

Bank 

Medical Research 

Education & Training

Benefits of AB8000HS

  • Give more quantitative data for the handwriting to improve the identification accuracy and reduce the identification error rate
  • One cycle of scanning, all the data for 2D, 3D,Indentation depth, ink thickness , pen tip tilting angle etc could be obtained in minutes
  • Making signature identification more objective through quantitative analysis, rather than relying solely on human expertise.
  • Utilizing the quantitative data, testifying in court for judgement is made simpler.

Product Highlights

  • Intelligent control and Quick scanning for handwriting evidence in 3-10 minutes based upon the scanning area
  • All the data for 2D, 3D,Indentation depth, ink thickness , pen tip tilting angle etc could be obtained
  • Quantitative data to help to evaluate the “known” signature’s character quality which are used as the reference for identification
  • With advanced algorithm, All the "known signatures" sample's typical handwriting characteristics of any defined "area" selected by the examiner could be examined to evaluate the “ quality” which be used as the reference of for specimen for comparsion
  • Data presentation,Charts, curves, 3D bar graphs, Pearson correlation coefficient
  • Utilizing the quantitative data for testifying in court

Same person's signature displays high corr. for pen pressure Distribution

Known/Simulated signatures show big diff./low corr. in pen pressure dist.

 

3D Bar displays Pen Pressure Distribution diffs.

Known Signatures  Characteristics Statistical Data to Compare with Specimen

 

 

 

 

 

 

 

Laser printing document Toner thickness measurement

( Canon8200C, 635C and HP M225 toner thickness distribution

with Red, Blue and Green curve)

 

Specification

 

Full motorized XYZ and Zoom

Software controlled Stage  movement for imaging and

Z axis movement range 0-50mm, Resolution:2.5 micros

Camera resolution

20 Million pixels with frame rate 25f/s

Vacuum system

The vacuum is made by a vacuum pump positioned in a double damped floating  suspension system, minimizing the vibrations to less than 1/10 of a micron

Light source

Low angle Ring Uniform illuminance LED light source with adjustable intensity , Ring Light source support 5 illumination zones with each separately controllable

Stage

Szie: 297x210mm  With tiny holes so vacuum adjustment could be applied to document and make the document flat

Optics magnification setting

0.5X,1X,2X,3X,6X

Software

User friendly GUI to guide user to set indentation sampling border, selection ,Number of measurement points, Determining the indentation Z-axis layer border and starting sampling

Sampling the signature stroke measurement points in one time. User could designate different data for analysis such as the whole signature comparison , specific stroke position, character’s radicals and characteristics points comparison

Acquiring the measurement profile at handwriting stroke image to acquire the indentation depth, ink depth, ink width and pen tip tilting angle

SIGNATURE CHARACTERSTICS POINTS POSITIONING AND DEMONSTRATION

After finishing the sampling, User could designate the area of the signature to filter out the measurement points that have the same indentation depth, Which will help to obtain distribution area that the signature strokes with the heaviest and the lightest points to assist the demo of whole signature panorama

Focus Variation stage control, with potential up to 10x faster 3D scanning

Super flexible 3D scanning saves full 3D signature information, for flexible postprocessing without the need for any new scanning.

DATA ANALYSIS AND RESULT DEMONSTRATION

Supporting demo the data curves for pen pressure indentation depth, ink indentation depth, ink width and pen tip tilting angle

INDENTATION CURVE AND DATA ANALYSIS

Multiple data filters support including Normalization, Mean, Median, Hamming etc. with all parameters configurable

Provide average , differential calculation of multiple measurement results for comparison, Similarities of data, such as Pearson coefficient .

3D scanning of the full signature.

View, Comparison and Analysis of measurement samples with data output to PDF and Excel files, all measurement data binary-file based. Secure and exchangeable

Report include original sample image, overview image with measurement point drawn, sampling profile image, single measurement point 3D image, single measurement point 2D image, measurement points dynamic curve for the purpose of data viewing, comparison and analysis

Other Reference Materials

The Measurement Science and Standards in Forensic Handwriting Analysis Conference took place on June 4-5, 2013 at the National Institute of Standards and Technology (NIST) Campus in Gaithersburg, Maryland. The purpose of this free conference was to enhance the current state of forensic handwriting analysis through the use of advancements in measurement science and the latest research investments in quantitative analysis capabilities

https://www.nist.gov/news-events/events/2013/06/measurement-science-and-standards-forensic-handwriting-analysis