Transcript 20111201Analysis_and..
Analysis and Application of Palmprint patterns
2011 年 12 月 1 日
Analysis and Application of Palmprint patterns ● Introduction of palmprint ● Palmprint patterns ● Application
Analysis and Application of Palmprint patterns ● Introduction of palmprint ● Palmprint patterns ● Application
Introduction of palmprint ● Palmprint: combination of ridge and crease ● Forming time ● Three Levels of Features ● Collecting
Introduction of palmprint ● Three Levels of Features • Global • Local • Fine
Introduction of palmprint ● Collecting • Inked • Live-scan • Latent
Analysis and Application of Palmprint patterns ● Introduction of palmprint ● Palmprint patterns ● Application
Palmprint patterns ● “Searching smart before you search hard” ● Major areas ● Ridge flows ● Crease formations ● Latent print shapes ● Usage: to determine • Specific palm area • Correct direction • Correct hand
Palmprint patterns ● Major areas
Palmprint patterns ● Ridge flows • General ridge flow is quite often repeated in the vast majority of palmprints • Patterns in different areas − Thenar − Hypothenar − Interdigital
Palmprint patterns ● Ridge flows: Thenar • Half-Moon • Long-Short
Palmprint patterns ● Ridge flows: Thenar • Vestige • Long & Short Square Nose Loops
Palmprint patterns ● Ridge flows: Thenar • Flip area
Palmprint patterns ● Ridge flows: Hypothenar • Undisturbed ridges running parallel • Down & Out and Funnel Area
Palmprint patterns ● Ridge flows: Hypothenar • Belly-Out • Carpal Delta and Hump
Palmprint patterns ● Ridge flows: Hypothenar • Outward Nose Loop with one or two Delta(s)
Palmprint patterns ● Ridge flows: Hypothenar • Inward Nose Loop • Combinations: double loop, downward nose loop, whorl
Palmprint patterns ● Ridge flows: Hypothenar • Delta Shift • High Carpal Delta
Palmprint patterns ● Ridge flows: Interdigital • Waterfall • Deltas
Palmprint patterns ● Ridge flows: Interdigital • More or less than 4 deltas • Loops
Palmprint patterns ● Ridge flows: Interdigital • Small loops • Whorl
Palmprint patterns ● Crease formations • Patterns in different areas − Three major crease − Thenar − Hypothenar − Interdigital
Palmprint patterns ● Crease formations: Major crease • Top: Distal Transverse Crease • Middle: Proximal Transverse Crease • Bottom: Radial Longitudinal Crease
Palmprint patterns ● Crease formations: Major crease • Top Crease − Crows Feet and Mounded over Flat − Suicide ridges − Hypothenar
Palmprint patterns ● Crease formations: Major crease • Top Crease − Splitter − Exiting between the index and middle fingers − Combination of them
Palmprint patterns ● Crease formations: Major crease • Middle Crease: starting and ending
Palmprint patterns ● Crease formations: Major crease • Bottom Crease: exiting
Palmprint patterns ● Crease formations: Thenar • Starburst Crease (with Feathering)
Palmprint patterns ● Crease formations: Thenar • Thumb (bracelet) Crease • Wrist Bracelet Crease
Palmprint patterns ● Crease formations: Thenar • Edge Crease • Thenar Scratches • Thenar Cross-Hatching
Palmprint patterns ● Crease formations: Hypohenar • Edge Crease
Palmprint patterns ● Crease formations: Interdigital • Crows Feet • Solid Crease
Analysis and Application of Palmprint patterns ● Introduction of palmprint ● Palmprint patterns ● Application
Application ● Palmprint registration ● Palmprint recognition
Palmprint registration ● Similarity of palmprint orientation fields
Palmprint registration ● Registration for matching[2] • Compute the expectation and variance of orientation field • Using Generalized Hough Transform and Average orientation field to roughly registrant palmprints
Palmprint registration ● Registration for indexing[3] • Multi-reference for more accurate registration • Considering both the similarity and diversity
Palmprint recognition ● Low resolution[4] • Using modified finite Radon transform (MFRAT) to extract the creases • Matching based on creases
Palmprint recognition ● High resolution[5] • Using crease energy to evaluate the quality of different area of a palmprint.
• Using crease as assistant feature.
Thanks!
Q&A
Reference:
[1] Ron Smith and Associates, Inc., “Demystifying palm prints,” http://www.ronsmithandassociates.com/.
[2] J. Dai, J. Feng, J. Zhou, "Robust and efficient ridge-based palmprint matching", IEEE Transactions on Pattern Analysis and Machine Intelligence, 2011 (To Appear).
[3] X. Yang, J. Feng, J. Zhou, "Palmprint indexing based on ridge features", IJCB, Washington, DC, Oct. 11-13, 2011.
[4] D. Huang, W. Jia, and D. Zhang, “Palmprint verification based on principal lines,” Pattern Recognition, vol. 41, no. 4, pp. 1316–1328, 2008.
[5] J. Dai, J. Zhou, "Multi-feature Based High-resolution Palmprint Recognition," IEEE Transactions on Pattern Analysis and Machine Intelligence (TPAMI), 33(5):945 –957, 2011.