The most popular fingerprint feature used for matching is the feature points, called minutiae. Several approaches have been proposed which in a way, involves detecting the skeleton image to locate the minutiae. Subsequently, the geometrical and other information are extracted and used to match the minutiae. However, the performance of the minutiae extraction varies. Problem arises when there is noise or the fingerprint image is not clear. This could cause the introduction of false minutiae or the omission of valid minutiae. In this project, the main aim is to devise methods to analyse the quality of the minutiae so that the overall matching is improved. This
will involve analysing the property of the minutiae to provide suitable confidence level and providing consistent information that can be extracted from the minutiae. Good knowledge in C/C++ or Matlab programming is essential for this project.
Friday, July 23, 2010
Neural Network based Color Image Segmentation
Breast cancer is the most common cancer among women, and is the second leading cause of cancer
deaths in women today. Basically, the diagnosis procedure of breast cancer consists of two steps; (1) mammography
based breast abnormality detection; (2) biopsy based diagnosis. Biopsy is the only definitive way to determine
whether cancer is present.
In this project, biopsy color Image segmentation based on neural networks will be studied. The objective of breast
biopsy image segmentation is to segment cells and blood vessels in the image.
As the second part of the project, color image segmentation software will be developed.
deaths in women today. Basically, the diagnosis procedure of breast cancer consists of two steps; (1) mammography
based breast abnormality detection; (2) biopsy based diagnosis. Biopsy is the only definitive way to determine
whether cancer is present.
In this project, biopsy color Image segmentation based on neural networks will be studied. The objective of breast
biopsy image segmentation is to segment cells and blood vessels in the image.
As the second part of the project, color image segmentation software will be developed.
Development of a Matlab-based Control System Laboratory
The aim of this project is to develop a Computer Aided Control System Design (CASCD) environment that
are typically utilised in an undergraduate controls laboratory. Due to their popularity and availability, MATLAB,
SIMULINK and the Real-Time Workshop toolbox are chosen as the prototyping environment. The following issues
should be addressed:
1. Standardisation: a consistent hardware interface to various laboratory apparatus and a consistent user
interface, for the following task: modelling, control design, data collection, parameter estimation, and real-time
experiment.
2. Control experiment via Internet: While the local real-time control could be extended for remote control via the
Internet, there will be some issues that are peculiar to Internet lab, e.g. all Internet experiments need to be selfresetting.
In addition, safety, security and user flexibilty are issues that need to be addressed
are typically utilised in an undergraduate controls laboratory. Due to their popularity and availability, MATLAB,
SIMULINK and the Real-Time Workshop toolbox are chosen as the prototyping environment. The following issues
should be addressed:
1. Standardisation: a consistent hardware interface to various laboratory apparatus and a consistent user
interface, for the following task: modelling, control design, data collection, parameter estimation, and real-time
experiment.
2. Control experiment via Internet: While the local real-time control could be extended for remote control via the
Internet, there will be some issues that are peculiar to Internet lab, e.g. all Internet experiments need to be selfresetting.
In addition, safety, security and user flexibilty are issues that need to be addressed
Wavelet-based Deconvolution for System Identification
In many practical applications, we are given access to the input and ouput of a system whose
characteristics are unknown. The term ‘deconvolution’ is used to describe the operation of separating the input
function from the characteristics of the system we intend to identify. Conventional techniques for deconvolution
based on direct Fourier or Laplace transfoms suffer from the ill-conditioned nature of the problem in the presence
of noise. The aim of this project is to develop and implement a robust deconvolution technique based on wavelets
and study its performance as compared with other conventional techniques. An appreciation of Matlab and
numerical computation skills would be desirable.
characteristics are unknown. The term ‘deconvolution’ is used to describe the operation of separating the input
function from the characteristics of the system we intend to identify. Conventional techniques for deconvolution
based on direct Fourier or Laplace transfoms suffer from the ill-conditioned nature of the problem in the presence
of noise. The aim of this project is to develop and implement a robust deconvolution technique based on wavelets
and study its performance as compared with other conventional techniques. An appreciation of Matlab and
numerical computation skills would be desirable.
A Highly Efficient DC Lamp Dimmer
The simplest lamp dimmer circuit consists of a rheostat, in series with the lamp, which one
may adjust to obtain the required brightness. Such linear regulators are quite inefficient since
a lot of power is wasted in them. Moreover, in the rheostat the moving contacts are likely to
get damaged in the long run, as its value is frequently adjusted by moving the slider. Such
linear control circuits provide an overall efficiency of no more than 50 per cent. This wastage
of power can be avoided if one uses pulse width modulation (PWM) which can be made to
control an electronic rheostat. The circuit shown here is based on PWM principle. Gate N1
and its associated components constitute an oscillator producing oscillations of approximately
200 Hz with a pulse width of 0.1 ms. This output is fed to transistor T1 for level shifting. At the
output of this transistor is a potentiometer VR2, using which a DC component can be added
to the pulses emerging from transistor T1. By adjusting this potentiometer/trimmer, one can
have a good linear control of the lamp brightness from completely off state to 100 per cent on
state. The signal is inverted by gate N2 and fed to MOSFET 12N10. IC CD40106 provides six
inverting buffers with Schmitt trigger action. The buffers are capable of transforming slowly
changing input signals into sharply defined jitter-free output signals. They are usually used as
wave and pulse shapers. IC CD40106 possesses high immunity and low power consumption
of standard CMOS ICs along with the ability to drive 10 LS-TTL loads. In this circuit loads up
to 24W can be connected between MOSFET drain and 12V supply without using a heatsink.
The loads can even be DC motors, miniature heating elements, etc. If one uses a low RDS
(on) MOSFET, a higher efficiency can be achieved. By using the components as shown in the
circuit, an efficiency of approximately 95 per cent can be achieved. The flexibility of the design
makes it possible to change the MOSFET with a similar one, in case of non-availability of
12N10. The circuit by itself does not draw much current when the load is disconnected.
Ensure proper ESD protection while handling the MOSFET to prevent damage. Lab note: The
circuit was tested using MOSFET IRF640 with RDS (on)=0.18 ohm.
may adjust to obtain the required brightness. Such linear regulators are quite inefficient since
a lot of power is wasted in them. Moreover, in the rheostat the moving contacts are likely to
get damaged in the long run, as its value is frequently adjusted by moving the slider. Such
linear control circuits provide an overall efficiency of no more than 50 per cent. This wastage
of power can be avoided if one uses pulse width modulation (PWM) which can be made to
control an electronic rheostat. The circuit shown here is based on PWM principle. Gate N1
and its associated components constitute an oscillator producing oscillations of approximately
200 Hz with a pulse width of 0.1 ms. This output is fed to transistor T1 for level shifting. At the
output of this transistor is a potentiometer VR2, using which a DC component can be added
to the pulses emerging from transistor T1. By adjusting this potentiometer/trimmer, one can
have a good linear control of the lamp brightness from completely off state to 100 per cent on
state. The signal is inverted by gate N2 and fed to MOSFET 12N10. IC CD40106 provides six
inverting buffers with Schmitt trigger action. The buffers are capable of transforming slowly
changing input signals into sharply defined jitter-free output signals. They are usually used as
wave and pulse shapers. IC CD40106 possesses high immunity and low power consumption
of standard CMOS ICs along with the ability to drive 10 LS-TTL loads. In this circuit loads up
to 24W can be connected between MOSFET drain and 12V supply without using a heatsink.
The loads can even be DC motors, miniature heating elements, etc. If one uses a low RDS
(on) MOSFET, a higher efficiency can be achieved. By using the components as shown in the
circuit, an efficiency of approximately 95 per cent can be achieved. The flexibility of the design
makes it possible to change the MOSFET with a similar one, in case of non-availability of
12N10. The circuit by itself does not draw much current when the load is disconnected.
Ensure proper ESD protection while handling the MOSFET to prevent damage. Lab note: The
circuit was tested using MOSFET IRF640 with RDS (on)=0.18 ohm.
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