1. DELFT UNIVERSITY OF TECHNOLOGY Jan C.A. van der Lubbe
Bernstein Meeting, Stuttgart, July 1-2, 2008
16 November, 2018

2. The TUD-Bernstein Team
Hector Moreu Otal
Behnaz Pourebrahimi
Mark van Staalduinen
Jan C.A. van der Lubbe
16 November, 2018

3. DUT Image Processing Tasks Vienna, January 17, 2008
Sieve Feature Measurements in Binary Images
Sieve Feature Measurements in Grayscale Images
Sieve Feature Segmentation in Grayscale Images
Watermark Imaging by Backlight Subtraction
Identical Watermarks Identification
16 November, 2018

4. Sieve Feature Measurements in Binary Images 1
Software to isolate watermarks from the Piccard Online database and the printed Piccard collection
16 November, 2018

5. Sieve Feature Measurements in Binary Images 2
Automatic Isolations
Performance Piccard Online: 80 %
Performance Printed Piccard: 85 %
Check by Expert
16 November, 2018

6. Sieve Feature Measurements in Binary Images 3
Manual isolation of a watermark from Piccard Online
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7. Sieve Feature Measurements in Binary Images 4
Manual isolation of a watermark from printed Piccard
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8. Sieve Feature Measurements in Binary Images 5
The isolation of watermarks from both collections is currently being carried out …
Images will be used to automatically measure watermarks height and width.
They will also be used to identify identical watermarks within both collections.
16 November, 2018

9. Identical Watermarks Identification 1 Printed Piccard vs
Identical Watermarks Identification 1 Printed Piccard vs. Piccard Online
Summation for every box
Compute vector
Compute Euclidean distance with the vectors of the database
16 November, 2018

10. Identical Watermarks Identification 2
Output: the first seven most similar watermarks to the query.
Check by Expert
Performance: 90%.
In the 62% of the cases the identical watermark occupies the first place.
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11. Identical Watermarks Identification 3
16 November, 2018

12. Sieve Feature Segmentation and Measurements in Grayscale Images 1
Software to segment chain and laid lines from X-ray and backlight images.
Measurements: laid lines density, chain lines distances
Identify identical pieces of paper based on chain and laid lines information. Demo version at:
16 November, 2018

13. Sieve Feature Segmentation and Measurements in Grayscale Images 2
Software to extract watermarks automatically
16 November, 2018

14. Watermark Imaging by Backlight Subtraction 1
Software for subtraction of back- and frontlight imagery.
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15. Watermark Imaging by Backlight Subtraction 2
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16. Publications Rembrandt for Dummies, Addison Wesley, 2007, p. 242-243.
Watermark detection in X-Ray Images from Paper for Dating Artworks, 5th IASTED Inf. Conf. on Signal Processing, Pattern Recognition, and Application, Innsbruck, Feb , 2008 (Moreu Otal, vStaalduinen, Paclik, vdLubbe)
Dutch Paper Making, Bernstein Catalogue (vdLubbe)
Digital Watermark Detection and Retrieval, Bernstein Catalogue (vdLubbe, Moreu Otal)
Image Enhancement in Noisy Watermark Images for Watermark Retrieval, EVA, Berlin, Nov , 2008 (Pourebrahimi, Moreu Otal, vdLubbe)
Moreu Otal: Isolation and Identification of Identical Watermarks within Large Databases, EVA, Berlin, Nov , 2008 (Moreu Otal, vdLubbe)
Content-based Paper Retrieval; Towards the Reconstruction of Art History, PhD Thesis, DUT, 2008 (vStaalduinen)
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17. Future Work
Improvement of Automatic Watermark Detection in Binary Images
Semi-automatic Watermark Detection in Grayscale Images
Advanced Matching Techniques
Watermark Scissors for Briquet?
The oldest picture of a Dutch paper mill. The paper mill of Schiedam on a map by Jacques de Gheyn, 1598.
16 November, 2018