Logical Currency Checking System
(An advanced mixed signal / pattern
recognition system)
About LCCS version 1.0
Logical Currency
Checking System version 1.0 is
an indigenously developed fast
currency counting and checking Electronic Hardware Unit and it works
reliably in almost all weather conditions. Mixed signal processing
concept has been used to develop the strategy for checking the
genuineness of Indian currency notes as per the specification brought
out by the Reserve Bank of India. This technology could be extended to
checking other currencies also.
Basic Technology
The checking and counting process
comprises of the following steps: (i)
Acquiring
1-D analog signals from
optical, Ultra Violet, Infra Red and Laser sensors,
(ii) Processing the discrete, analog and mixed
signals,
and (iii) Decision making
whether the subjected currency is genuine or not. The genuineness of a
bill is ultimately decided by the fact whether the bill has the
security thread or not. Based on the decision, a Go -
NoGo signal is generated and the currency is accepted or rejected. The
throughput rate of this checking and counting process is about 900 bills
per minute.
Advanced signal Processing
The stack of tactile sensors consists of 19
or more light sources and optical / laser / UV / IR sensors. The following
image shows the arrangement. The bill is moved from right to left.


Reference Currency is moved in this direction



19th track
Stack of 19 LED sources and sensors (Tactile sensors)
At the end of the scanning, each sensor
produces an analog signal as shown above in the right.

Now we have a set of 19 discrete signals as shown above in the left. These discrete
signals are represented as x1(n), x2(n), x3(n),
x4(n), x5(n), ………, x19(n) and these are
matched with template signals in the decision process. For example, the
signal x19(n) is the discrete number sequence x19(0),
x19(1), x19 (2), x19(3), x19(4),
x19(5), ……, x19(32). Now, the arithmetic sum of
each discrete number sequence is calculated. Thus we have 19 sums. The
bar chart corresponding to these 19 values is shown above in the right. This chart is
obtained by actually measuring the sums while checking a 500-rupee
currency bill in our research laboratory. The smallest of these 19
values (for example, the value 1640 milli volts shown in the chart)
corresponds to the thread embedded in the currency. Absence of the
smallest value means that the currency under investigation is a
counterfeited one. The RBI notification (http://www.rbi.org.in)
about the security thread clearly indicates that (i) Rs.1000
notes introduced in October 2000 contain a readable, windowed security
thread alternately visible on the obverse with the inscriptions ‘Bharat’
(in Hindi), ‘1000’ and ‘RBI’, but totally embedded on the reverse, (ii)
The Rs.500 and Rs.100 notes have a security thread with similar visible
features and inscription ‘Bharat’ (in Hindi), and ‘RBI’ ; when held
against the light, the security thread on Rs.1000, Rs.500 and Rs.100 can
be seen as one continuous line, (iii) The Rs.5, Rs.10, Rs.20 and Rs.50
notes contain a readable, fully embedded security thread with the
inscription ‘Bharat’ (in Hindi), and ‘RBI’ ; the security thread appears
to the left of the Mahatma's portrait and (iv) Notes issued prior to the
introduction of the Mahatma Gandhi Series have a plain, non-readable
fully embedded security thread.
The technique presented above is highly reliable to detect plain
non-readable fully embedded security thread with the speed of 900 notes per
minute.
Alternatively, the
windowed security threads are detected by our advanced mixed signal
processing system which makes use of a new state-of-the-art technology of
processing mixed signals (analog and digital) produced by a stack of
high-fidelity optical sensors.
Pentagram Research has a Commercial and Intellectual Property Right on this
technology and thus it has not been reported here.
Logical Currency Checking System
(An advanced pattern
recognition system)
About LCCS version 2.0
Logical Currency Checking
System
version 2.0 is an indigenously developed
fast operating currency counting and checking Electronic Hardware Unit
fitted with an Expert System Software and it works
reliably in almost all weather conditions. Mixed signal processing,
Pattern recognition and Image processing concepts
have been used to develop the strategy for checking the genuineness of a
currency note, be it a U.S. Dollar bill or a Euro Currency or any other
note of any origin.
Basic Technology
The state-of-the-art technique used in
this system employs the following steps: (i)
Acquiring
1-D analog signals from
optical, Ultra Violet, Infra Red and Laser sensors, (ii) Acquiring the
image of the currency
in Ultra Violet and / or panchromatic light ambience from the scanners /
digital cameras, (iii)
Processing the discrete, analog and mixed signals, (iv) Processing the
2-D image of the currency using High-throughput Cellular Logic Array
Processing principles such as (1) pattern recognition involving
Rajan Transform, (2) Histogram techniques, (3) Texture based
classification, (4) Feature Extraction techniques like
Spatial distribution of
various features, Spectral Characteristics of various features, Volume fraction of each
feature, Gridding technique (As done
in the case of DNA Finger printing) and (v) Decision making whether the
currency under investigation is genuine or not. Based on the decision, a Go -
NoGo signal is generated and the currency is accepted or
rejected. The throughput rate of the currency checking and counting is
about 900 bills per minute.
Block Diagram of the LCCS version 2.0

RBI
specifications
(http://www.rbi.org.in)
A genuine currency note
should have certain parameters specified by the Reserve Bank of
India.
Our fake
currency detecting machine
LCCS version 2.0
checks for the genuineness of the bill based on such parameters.
Watermark:
The Mahatma Gandhi Series of banknotes contain the Mahatma Gandhi watermark
with a light and shade effect and multi-directional lines in the watermark
window.

Latent Image:
On the obverse side of Rs.1000, Rs.500, Rs.100, Rs.50 and Rs.20 notes, a
vertical band on the right side of the Mahatma Gandhi’s portrait contains
a latent image showing the respective denominational value in numeral. The
latent image is visible only when the note is held horizontally at eye
level. The following figure shows the number 100 which is detected at the
right of Mahatma Gandhi portrait by LCCS version 2.0.

Intaglio Printing:
The portrait of Mahatma Gandhi, the Reserve Bank seal, guarantee and promise
clause, Ashoka Pillar Emblem on the left, RBI Governor's signature are
printed in intaglio, that is, in raised prints, which can be felt by touch,
in Rs.20, Rs.50, Rs.100, Rs.500 and Rs.1000 notes.
Identification mark:
A special feature in intaglio has been introduced on the left of the
watermark window on notes of Rs.20 and above denomination. This feature is
in different shapes for various denominations (Rs. 20-Vertical Rectangle,
Rs.50-Square, Rs.100-Triangle, Rs.500-Circle, Rs.1000-Diamond) and helps the
visually impaired to identify the denomination.

Hardware
required
LCCS version 2.0 will run on any IBM
compatible PC which has at least 64 MB RAM and 4 GB hard disk. A high
resolution color monitor is recommended for a good display. The operating
system should be Windows 95 and above or Windows NT and XP.
Other
platforms
LCCS version 3.0 runs on Silicon
Graphics workstation with the operating system IRIX 6.1 and above.
LCCS version 4.0 runs on SOLARIS OS based SUN
workstation. LCCS version 4.0 would be ported to SUN SOLARIS environment
under the SUN Partnership program.
Potential
users:
All
Banks, Commercial shops and complexes, Corporate hospitals, Hotels and
restaurants, E-Sewa centers, Airports, ATMs manufacturers, Academic
institutions, Mints would find this system inevitable.
Transaction Automation System
(An advanced biometric security system)
About TAS
An
encryption technique for fingerprint signatures has been incorporated in
the biometric security check and this was originally proposed as a
project to a bank in Singapore. A high-end processor with intelligent
software embedded into it would be fixed in the ATM card or credit card
which would ensure the highest level of security in the transaction. The
encryption and decryption algorithms are kept absolutely confidential
and so one is assured of undoubted reliability in the entire transaction
automation scheme suggested by us. Some of the screen shot images are
provided below which are self-explanatory.


LCCS
version 4.0 runs on SOLARIS OS based
SUN workstations
and Sun Fire X2200 M2
dual-core server
(Release Date: Not yet decided)
Send your
purchase order or queries to:
Pentagram Research Centre Pvt. Ltd.
201, Venkat Homes, MIGH - 59, Mehdipatnam
Hyderabad - 500 028, Andhra Pradesh, India
Mobile: 9885204420,
Tel : +91-40-23533108
E-mail:
commercial@pentagramresearch.com
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