MATLAB PROJECTS

MATLAB – SIGNAL PROCESSING

Infant Cry Analysis and classification based on MFCC, DWT, DCT, Kurtosis , Skewness and BNN model

February 2019 – March 2019

Crying is a communication method used by infants given the limitations of language. Parents or nannies who have never had the experience of taking care of the babies will experience anxiety when a infant cries. Therefore, we need a way to understand about infant’s cry and apply the formula. This research develops a system to classify the infant’s cry sound using Back Propagation neural network and feature extraction based on combination of MFCC, DWT, DCT, Kutosis and Skewness. Cry analysis is classified into 3 classes: hungry, discomfort, and pain. If classified as Pain more importance needs to be given.

Infant Cry Analysis and classification based on MFCC, DWT, DCT, Kurtosis , Skewness and BNN model

February 2019 – March 2019

Crying is a communication method used by infants given the limitations of language. Parents or nannies who have never had the experience of taking care of the babies will experience anxiety when a infant cries. Therefore, we need a way to understand about infant’s cry and apply the formula. This research develops a system to classify the infant’s cry sound using Back Propagation neural network and feature extraction based on combination of MFCC, DWT, DCT, Kutosis and Skewness. Cry analysis is classified into 3 classes: hungry, discomfort, and pain. If classified as Pain more importance needs to be given.

Number plate and Car model recognition using Morphological image processing and correlation

February 2019 – March 2019

An automatic and robust vehicle license plate recognition system has been developed. The proposed method uses scan line evaluation and averaging method to localize the number plate followed by a border removal mechanism combined with character mending and approximation of character height to extract the number plate characters.

Finally, a template matching approach is used to recognize the characters. A Graphical User Interface has been created and the algorithm is experimented successfully on a variety of real images, both single as well as double line plates. The sample results obtained on testing with various images are also detailed.

Virtual mouse implementation and its application for physically disabled using voice signals

April 2014 – April 2014

Speech recognition for the above is based on MFCC coefficient method. In the training phase all the voice inputs(left click, right click, double click etc) for mouse activities are extracted and stored for future processing. During the test phase again the same procedure is repeated. Java robot can be used here for mouse control activities like left click, right click, double click and cursor movements like left, right, up and down

An adaptive audio watermarking based on the singular value decomposition in the wavelet domain

February 2014 – February 2014

This paper presents a secure, robust, and blind adaptive audio watermarking algorithm based on singular value decomposition (SVD) in the discrete wavelet transform domain using synchronization code. In our algorithm, a watermark is embedded by applying a quantization-index-modulation process on the singular values in the SVD of the wavelet domain blocks. The watermarked signal is perceptually similar to the original audio signal and gives high quality output. Experimental results show that the hidden watermark data is robust to additive noise, resampling, low-pass filtering, requantization, MP3 compression, cropping, echo addition, and denoising. Performance analysis of the proposed scheme shows low error probability rates. The data embedding rate of the proposed scheme is 45.9 bps. The proposed scheme has high payload and superior performance against MP3 compression compared to the earlier audio watermarking schemes.

Audio watermarking based on SVD on frequency domain

February 2014 – February 2014

This paper presents a secure, robust, and blind adaptive audio watermarking algorithm based on singular value decomposition (SVD) using discrete cosine transform. In our algorithm, a watermark is embedded by applying a quantization-index-modulation process on the singular values in the SVD of the cosine(frequency) domain blocks. The watermarked signal is perceptually similar to the original audio signal and gives highly quality output. The output actually has better quality than the input signal.

Speech Recognition using MFCC coefficients:

February 2014 – February 2014

The first step in any automatic speech recognition system is to extract features i.e. identify the components of the audio signal that are good for identifying the linguistic content and discarding all the other stuff which carries information like background noise, emotion etc. The main point to understand about speech is that the sounds generated by a human are filtered by the shape of the vocal tract including tongue, teeth etc. This shape determines what sound comes out. If we can determine the shape accurately, this should give us an accurate representation of the phoneme being produced. The shape of the vocal tract manifests itself in the envelope of the short time power spectrum, and the job of MFCCs is to accurately represent this envelope.

Image Enhancement and Video Enhancement using Bi-histogram equalization and Linear contrast stretching

February 2013 – February 2013

Description: The main aim of any enhancement scheme is to reveal the hidden details present in the image and to make the processed image more prominent compared to the host image. In this project bi-histogram equalization method is used to enhance the image and for enhancing the video, linear contrast stretching method is used. The application of image and video enhancement is vast. If the input image is too bright, after enhancing the pixel values will be stretched towards dark and vice versa.

Pattern recognition using SIFT:

February 2014 – February 2014

Pattern recognition for images is one of challenging sector in image processing domain. It is very difficult to come to a conclusion whether two images of same object with different intensities, rotation and scaling parameters are matching or not. Many algorithms are developed for handling such problems, SIFT is one of the popularly used algorithms which deals with the above following parameters. Features of the images are extracted using SIFT algorithm, key points of the images are matched to arrive at conclusion whether the images are similar or not.


Vibration Sensor

Description: 1) can detect vibration or tilt. 2) Operating voltage 3.3V-5V. 3) Digital switching outputs (0 and 1) 4) with fixed bolt hole for easy installation 5) small board PCB size: 3cm * 1.6cm 6) Power LED (red) and the digital switch output indicator (green) 7)using LM393 comparator chip

Ultrasonic Ranging Module HC - SR04

Product features: Ultrasonic ranging module HC - SR04 provides 2cm - 40cm non-contact measurement function, the ranging accuracy can reach to 3mm. The modules includes ultrasonic transmitter, receiver and control circuit. The basic principle of work: (1) Using IO trigger for at least 10us high level signal, (2) The Module automatically sends eight 40 kHz and detect whether there is a pulse signal back. (3) IF the signal back, through high level , time of high output IO duration is the time from sending ultrasonic to returning. Test distance = (high level time?velocity of sound (340M/S) / 2. Interfacing Pins: -> 5V Supply -> Trigger Pulse Input <- Echo Pulse Output -> 0V Ground Electric Parameters: Working Voltage DC 5 V Working Current 15mA Working Frequency 40Hz Max Range 40cm Min Range 2cm MeasuringAngle 15 degree Trigger Input Signal 10uS TTL pulse Echo Output Signal Input TTL lever signal and the range in proportion Dimension 45*20*15mm

Temperature Senor LM35

Precision Centigrade Temperature Sensors General Description: The LM35 series are precision integrated-circuit temperature sensors, whose output voltage is linearly proportional to the Celsius (Centigrade) temperature. The LM35 thus has an advantage over linear temperature sensors calibrated in ?Kelvin, as the user is not required to subtract a large constant voltage from its output to obtain convenient Centigrade scaling. The LM35 does not require any external calibration or trimming to provide typical accuracies of ? ? ?C at room temperature and ? ? ?C over a full -55 to +150?C temperature range. Low cost is assured by trimming and calibration at the wafer level. The LM35's low output impedance, linear output, and precise inherent calibration make interfacing to readout or control circuitry especially easy. It can be used with single power supplies, or with plus and minus supplies. As it draws only 60 mA from its supply, it has very low self-heating, less than 0.1?C in still air. The LM35 is rated to operate over a -55 to +150?C temperature range, while the LM35C is rated for a -40 to +110?C range (-10? with improved accuracy). The LM35 series is available packaged in hermetic TO-46 transistor packages, while the LM35C, LM35CA, and LM35D are also available in the plastic TO-92 transistor package. The LM35D is also available in an 8-lead surface mount small outline package and a plastic TO-202 package. Features: Y Calibrated directly in ? Celsius (Centigrade) Y Linear a 10.0 mV/?C scale factor Y 0.5?C accuracy guaranteeable (at +25?C) Y Rated for full -55? to +150?C range Y Suitable for remote applications Y Low cost due to wafer-level trimming Y Operates from 4 to 30 volts Y Less than 60 mA current drain Y Low self-heating, 0.08?C in still air Y Nonlinearity only ? ? ?C typical Y Low impedance output, 0.1 ohm for 1 mA load

Rain Drop Sensor

Operating Voltage: 5V power LED indicator, & output signal LED indicator. TTL-level output, Driving capability 100mA, It can directly drive relays, buzzer, small fans, etc. Sensitivity can be adjusted via potentiometer Raindrop Sensor Board and control panel Board are separate, easy to wire leads. A large area of very sensitive rain board, more conductive are to detect rain. Board with positioning holes to facilitate mounting panel board size: 3 * 1.6 MM large raindrop detection plate 5.4mm * 4.0mm (Nickel Coated Sensor Boards with 0.5 micron build up, hence long life, no corrosion and no oxidization.)

PIR Sensor

General Description: The PIR (Passive Infra-Red) Sensor is a pyroelectric device that detects motion by measuring changes in the infrared levels emitted by surrounding objects. This motion can be detected by checking for a high signal on a single I/O pin. Features: > Single bit output > Small size makes it easy to conceal > Compatible with all Parallax microcontrollers Application Ideas: > Alarm Systems > Halloween Props > Robotics

Peltier with Heatsink and fan

Device that transfers heat from one side of the body to the other side of the body and there by making one side of the body extremly cold (ice formation may happen depending on the current supplied and the room temperature) and other side of the body gets hot. (Heat dissipation is required in order to protect the module from getting damaged).

Peltier TEC1-12706

Device that transfers heat from one side of the body to the other side of the body and there by making one side of the body extremly cold (ice formation may happen depending on the current supplied, type of heat sink used and the room temperature) and other side of the body gets hot. (Proper Heat dissipation is required in order to protect the module from getting damaged).

Light Sensor

Light Intensity Sensor: Module Features: 1, Using photosensitive resistance sensor or (LDR) Light Dependent Sensor. 2, Driving ability, more than 15mA. 3, With adjustable potentiometer can adjust the light intensity detected. 4, Working voltage 3.3V-5V. 5, Output Type: Digital switching output (0 and 1) and Analog Output. 6, With bolt holes for easy installation. 7, Small PCB size : 3.2cm x 1.4cm 8, Using a wide voltage LM393 comparator. 1, Photoresistor module most sensitive to ambient light, generally used to detect the brightness of the ambient light, triggering microcontroller or relay module; 2, When the outside ambient light intensity exceeds a set threshold, DO-ended output will be low; 3, DO output can be directly connected with the microcontroller to detect high and low, thereby detecting ambient light levels change; 4, the output can directly drive DO OUR relay module, which can be composed of a light control switch.

Humidity Sensor

Resistance HR202 Humidity Sensor: HR202 humidity resistance sensor is made up of organic polymer materials, it has very good humidity sensing range, stable performance, long-term use, can be used in warehousing, cars, indoor air quality control, building automation, medical, industrial control systems and wide range of applications such as scientific research. Technical parameters: parameters (at 1kHz) Unit: ohm operating range 20 ... 95% RH 0 ... 60 ?. Humidity detection accuracy of ? 5% RH. Description: 1) can detect ambient humidity. 2) adjustable sensitivity (shown in blue digital potentiometer adjustment) 3) Operating voltage 3.3V-5V. 4) output from a) 5 analog voltage output. b) Digital switching outputs (0 and 1) 5) with fixed bolt hole for easy installation 6) small board PCB size: 3cm * 1.6cm 7) Power LED (red) and the digital switch output indicator (green) 8)using LM393 comparator chip, Application: Used to display temperature and humidity, Atmospheric environmental monitoring, industrial process control, agriculture, surveying instruments etc. 1) Humidity resistance module most sensitive to environmental. 2) When the external environment humidity exceeds the set threshold, the module D0 output is low. 3) Digital output D0 can be directly connected with the microcontroller to detect high and low, thereby detecting environmental humidity changes; 4) Can drive relay module directly, which can be composed of a wet control switch. 5) It also has analog output.

Price : 425 350

Humidity & Temperature Sensor DHT 11

This DHT11 Temperature & Humidity Sensor features a temperature & humidity sensor complex with a calibrated digital signal output. By using the exclusive digital-signal-acquisition technique and temperature & humidity sensing technology, it ensures high reliability and excellent long-term stability. This sensor includes a resistive-type humidity measurement component and an NTC temperature measurement component, and connects to a highperformance 8-bit microcontroller, offering excellent quality, fast response, anti-interference ability and cost-effectiveness. Each DHT11 element is strictly calibrated in the laboratory that is extremely accurate on humidity calibration. The calibration coefficients are stored as programmes in the OTP memory, which are used by the sensor's internal signal detecting process. The single-wire serial interface makes system integration quick and easy. Its small size, low power consumption and up-to-20 meter signal transmission making it the best choice for various applications, including those most demanding ones. The component is 4-pin single row pin package. It is convenient to connect.

Price : 500 400

Flex Sensor 2

Product Specs: Features: - Angle Displacement Measurement - Bends and Flexes physically with motion device - Possible Uses - Robotics - Gaming (Virtual Motion) - Medical Devices - Computer Peripherals - Musical Instruments - Physical Therapy - Simple Construction - Low Profile Mechanical Specification: -Life Cycle: >1 million -Height: 0.43mm (0.017") -Temperature Range: -35?C to +80?C Electrical Specification: -Flat Resistance: 10K Ohms -Resistance Tolerance: ?30% -Bend Resistance Range: 60K to 110K Ohms -Power Rating : 0.50 Watts continuous. 1 Watt Peak.

Price : 750 650

Colour_Sensor_TCS3200

The TCS3200 and TCS3210 programmable color light-to-frequency converters that combine configurable silicon photodiodes and a current-to-frequency converter on a single monolithic CMOS integrated circuit. The output is a square wave (50% duty cycle) with frequency directly proportional to light intensity (irradiance). Features: High-Resolution Conversion of Light Intensity to Frequency Programmable Color and Full-Scale Output Frequency Communicates Directly With a Microcontroller Single-Supply Operation (2.7 V to 5.5 V) Power Down Feature Nonlinearity Error Typically 0.2% at 50 kHz Stable 200 ppm/?C Temperature Coefficient Low-Profile Lead (Pb) Free and RoHS Compliant Surface-Mount Package

Price : 400 500

BMP085 Digital Pressure Sensor

The BMP085 is the fully pin- and function compatible successor of the SMD500, a new generation of high precision digital pressure sensors for consumer applications. The universal C-code SMD500/BMP085 (?BMP085_SMD500_API?) is fully upward compatible to SMD500 and recognizes automatically the device ID. The ultra-low power, low voltage electronics of the BMP085 is optimized for use in mobile phones, PDAs, GPS navigation devices and outdoor equipment. With a low altitude noise of merely 0.25m at fast conversion time, the BMP085 offers superior performance. The I2C interface allows for easy system integration with a microcontroller. The BMP085 is based on piezo-resistive technology for EMC robustness, high accuracy and linearity as well as long term stability. Key features Pressure range: 300 ... 1100hPa (+9000m ... -500m above sea level) Supply voltage: 1.8 ... 3.6V (VDDA) and 1.62V ... 3.6V (VDDD) Low power: 5?A at 1 sample / sec. in standard mode Low noise: 0.06hPa (0.5m) in ultra low power mode 0.03hPa (0.25m) ultra high resolution mode < 0.1m possible with software averaging algorithm - Temperature measurement included - I2C interface - Fully calibrated New features Smaller package height 1.2mm Faster conversion time (standard mode each) 7.5ms (max.) Faster I2C data transfer max. 3.4MHz max. Extended min. supply voltage min. 1.8V min. Lower stand-by current (typ.) 0.1?A External clock not necessary Typical applications ? Enhancement of GPS navigation (dead-reckoning, slope detection, etc.) ? In- and out-door navigation ? Leisure and sports ? Weather forecast ? Vertical velocity indication (rise/sink speed)

Price : 1025 900

Analog Gyroscope LPY530AL

MEMS motion sensor: Dual Axis Pitch and Yaw ?300?/s Analog Gyroscope LPY530AL The LPY530AL is a low-power two-axis micromachined gyroscope able to measure angular rate along pitch and yaw axes. It provides excellent temperature stability and high resolution over extended operating temperature range (-40?C to +85?C). The LPY530AL has a full scale of ?300 ?/s and is capable of detecting rates with a -3 dB bandwidth up to 140 Hz. The gyroscope is the combination of one actuator and one accelerometer integrated in a single micromachined structure. It includes a sensing element composed by single driving mass, kept in continuos oscillating movement and able to react when an angular rate is applied based on the Coriolis principle. A CMOS IC provides the measured angular rate to the external world through an analog output voltage, allowing high level of integration and production trimming to better match sensing element characteristics

Price : 900 700

ADXL345

ADXL345 module triaxial accelerometer module I2C / SPI Communication, digital accelerometer module tilt Sensor. Module Power supply :3-5V, Communication: IIC / SPI, Module size: 19mm x 14mm. The ADXL345 is a small, thin, low-power 3-axis accelerometer with high resolution (13), measuring range up to ? 16g. The digital output data is 16-bit two's compliment format, through the SPI (3-wire or 4-wire) or I2C digital interface. ADXL345 is well suited for mobile device applications. It can be measured in tilt-sensing applications, static acceleration of gravity, you can also measure the motion or shock caused by dynamic acceleration. Its high resolution (4 mg / LSB), capable of measuring less than 1.0 ? tilt angle. The device offers a variety of special detection. Active and inactive motion detection function detects whether the occurrence and acceleration on any axis exceeds a user-set limits. Tap sensing detects and double-click action. Freefall Detection function detects the device is falling. These functions can be mapped to two interrupt output pin in one. The patent-pending 32 FIFO (FIFO) buffer can be used to store data to minimize host processor intervention. . PCB board sided gold-plated

Price : 950 850

Accelerometer ADXL335

The ADX335 is a small, thin, low power, complete 3-axis accelerometer with signal conditioned voltage outputs. The product measures acceleration with a minimum full-scale range of +/-3 g. It can measure the static acceleration of gravity in tiltsensing applications, as well as dynamic acceleration resulting from motion, shock, or vibration. Features: 3-axis sensing. Low power - 350 ua (typical). Single-supply operation 1. 8v to 3. 6v (built in regulator on the pcb for the input of 5v). Analog data output. 10,000 g shock survival. Excellent temperature stability. Bw adjustment with a single capacitor per axis. Rohs/weee lead-free compliant.

Price : 650 500