The AB8000 Handwriting Quantitative Analysis System is a cutting-edge tool that utilizes focus variation microscopy and image processing technology to assist forensic document examiners. It enables the extraction of handwriting features by analyzing variations in pen pressure, tilt angle, and ink distribution. This quantitative data complements traditional qualitative assessments, allowing for a comprehensive analysis of complex signatures, including those with minimal strokes or high simulation levels.
Application
Forensic
Bank
Medical Research
Education & Training
Benefits of AB8000HS
1. Enhanced Identification Accuracy: The AB8000HS offers extensive quantitative data on handwriting, enabling examiners to substantiate their opinions with quantitative data to make the examination more objective
2. Support for Challenging Signatures: Effectively analyzes signatures with fewer strokes, high-level simulations, or significant disguises, providing valuable quantitative data for accurate assessments.
3. Rapid Data Collection: The system completes a comprehensive scanning cycle in minutes, capturing critical data on 2D and 3D features, indentation depth, ink thickness, and pen tip tilting angle.
4. Objective Analysis: By utilizing quantitative analysis, the AB8000HS transforms signature identification into a more objective process, reducing reliance on subjective human judgment.
5. Facilitated Court Testimony: The quantitative data obtained supports clear and effective testimony in court, bolstering legal arguments with reliable evidence for accurate judgments.
Key Features of AB8000HS
· Intelligent Control & Quick Scanning: Scans handwriting evidence in just 3-10 minutes, depending on the scanning area.
· High-Resolution Imaging: Produces 20MP sharp images, capturing essential data for analysis, including 2D and 3D features, indentation depth, ink thickness, and pen tip tilt angle.
· Motorized Stage: Features a negative vacuum motorized stage to accommodate A4-sized paper and ensure a flat surface.
· Quantitative Evaluation: Provides quantitative data to assess the quality of “known” signatures, serving as a reference for identification.
· Advanced Algorithm: Analyzes typical handwriting characteristics of selected "known" signature samples for quality evaluation and comparison.
· Comprehensive Data Presentation: Displays results through charts, curves, 3D bar graphs, and Pearson correlation coefficients.
· Court Testimony Support: Utilizes quantitative data to facilitate clear and effective testimony in legal proceedings.
Demo
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Focus Variation Microscopy captures high-resolution images at each axial step, calculating contrast at all XY positions. An advanced algorithm identifies the optimal Z-position, while AI filtering generates a highly precise 3D image.
Capturing high-resolution, sharp signature images for detailed extraction of critical information, enhancing the analysis of intricate features and ensuring accurate identification.
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Paper /Ink Indentation Depth, Ink Thickness and Pen tip tilting Data (Left/Right) are extracted with precise data
Consistency of the Known Signatures from the same with quantitative data
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Intuitive Color Bar |
Simulation signature analysis reveals fundamental differences from known signatures.
Visualization to indicate the pen indentation characteristics.
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Utilizing specialized algorithm to assess stroke detail quality through quantitative data, to see if the Knows signature’s detailed characteristics is stable and reliable, then compare the specimen with the known signature.
The AB8000 offers a seamless examination of robotic writing systems and AI-driven signature simulation, leveraging known signatures for accurate analysis.
Specification
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Full motorized XYZ and Zoom |
Software controlled Stage movement for imaging and Z axis movement range 0-50mm, Resolution:2.5 micros |
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Camera resolution |
20 Million pixels with frame rate 25f/s |
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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 |
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Light source |
Low angle Ring Uniform illuminance LED light source with adjustable intensity , Ring Light source support 5 illumination zones with each separately controllable |
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Stage |
Szie: 297x210mm With tiny holes so vacuum adjustment could be applied to document and make the document flat |
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Optics magnification setting |
0.5X,1X,2X,3X,6X |
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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
