— The use of digital instruments in industries and laboratories is rapidly increasing as they are simple to calibrate and have relatively high precision. In this paper, an automatic data acquisition system is proposed using OCR technique from digital multi-meter and other similar digital display devices. The input image is taken from a digital multi-meter having LCD seven segment display using a web cam. The image is then processed to extract numeric digits which are recognized using a feedforward neural network. The recognized values may be then exported to a spreadsheet for graph plotting and further analysis. A distinct advantage of this method is that it can automatically detect decimal point as well as negative sign. This setup can be used in real time systems employing a wide variety of digital display instruments, with high accuracy. Keywords — OCR, Adaptive Thresholding, Data acquisition I. INTRODUCTION Measuring devices in the laboratory as well as in some industries mostly have a display unit through which the output is taken. The process of output data collection from display is usually done manually or by data acquisition cards which may not be always available. Moreover, commonly available data acquisition cards are very costly. So a solution of this data acquisition problem is proposed using a webcam and processing unit which can be arranged for at a nominal cost. Further it can eliminate the error of human eye as well as adjust the interval of taking the reading. The main objective in OCR technique is to distinguish the object of interest from the original image. In order to achieve that, the noise within the image has to be removed up to a certain level without deforming the character to be r... ... middle of paper ... ... S. J. Perantonis, B. Gatos and N. Papamarkos “Image Segmentation and linear feature identification using rectangular block decomposition” ICECS ’96 Proceedings of the Third International Conference on Electronics, Circuits and Systems, pp-183-186. [13] Shaoyuan Sun, Haitao Zhao “Kernel Averaging Filter” 2008. CISP ‘08 Congress on Image and Signal Processing, pp-681-685. [14] Derong Liu, Tsu-Shuan Chang, and Yi Zhang, “A constructive algorithm for feedforward neural networks with incremental training”, IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications, vol - 49 no - 12, pp - 1876-1879. [15] Nallasamy Mani and Bala Srinivasan. “Application of Artificial Neural Network Model for Optical Character Recognition” 1997 IEEE International Conference on Systems, Man and Cybernetics and Simulation, vol - 3, pp-2517-2520.
Presentational Devices Used in Films In traditional fairy tales, ogres are man-eating beasts. The Prince usually rescues the Princess; they marry and live happily ever after. How do the makers of Shrek use presentational devices to reverse this tradition, to reveal the ogre as good, and the Prince as evil?
...e data from the camera is fed to the processing unit in a computer (PC). The raw data is processed and the heart rate and the PPG waveform are displayed on the screen.
Nurses have long been known for their attention to patient care. The reason many nurses have entered this profession is due to their desire to care for people. The overwhelming responsibilities of documentation, chart reviews, verifying orders and medications, monitoring lab results, among others, leaves the direct care of the patient to another, possibly unqualified, staff member. Bolton, Gassert, and Cipriano (2008) estimate that a mere 23-30% of a nurse’s day is spent providing care to a patient. This leaves the greater part of a 12-hour shift performing some kind of paperwork. In fact, the inability to provide more patient care has been cited as a reason many nurses leave their job, and the profession altogether (Bolton et al., 2008).
An oscilloscope is a laboratory instrument that commonly used to display and analyze the waveform of electronic signals. This device draws a graph of signal voltage as a function of time. Oscilloscope usually have two-dimensional graph which electrical potential differences represent by Y-axis (vertical) and time represent by X-axis (horizontal). With positive values going upward and negative values going downward (Ask.com, 2014). In any oscilloscope, the horizontal sweep is measured in seconds per division (s/div), milliseconds per division (ms/div), microseconds per division (s/div), or nanoseconds per division (ns/div). The vertical deflection is measured in volts per division (V/div), millivolts per division (mV/div), or microvolts per division (µV/div).
Three dimensional motion capture requires more than one camera to create depth in the motion being performed. A good example is eyesight. If someone where unfortunate enough to only have one eye they would be unable to see the 3-D depth in motion. Having two eyes allows for depth in motion when seeing, which is similar to the idea of using two cameras in order to fully capture the depth in motion. One of the few techniques discovered and used in 3-D motion capture is Direct Linear Transform (DLT). Using the idea that, images from the cameras are determined by their placement to discover their distances, equations could be formed and used. Test subjects wear reflective markers to allow the cameras to follow their movement and motion through space. These reflective markers are placed on certain joins and parts of the body the researcher would like to study. The reflective markers ca...
This makes use of the control software using a Webcam and some distances and presence sensors controlled by a PIC microcontroller that establishes the communication with the logic circuit with the help of a program. A MEMS accelerometer is used here (it is an apparatus, either mechanical or electromechanical, for measuring acceleration or deceleration - that is, the rate of increase or decrease in the velocity of a moving object acceleration or one of its derivative properties such as vibration, shock, or tilt).
In this section, the results of the research are presented. For each task carried out, the most important information obtained is presented.
When it comes to recording in a modern day environment DAW’s (digital audio workstation) are an essential piece of equipment if professional standard results are desired. Although DAW’s are considered a modern technological advancement the first attempt at a DAW was in 1977 and it came from Dr. Tom Stockham’s Soundstream (See references for full description) digital system. It had very powerful editing capabilities and for its time a very advanced crossfader but was still primitive compared to today’s standard. At this moment there are 100’s of DAW’s on the market but arguably there some obvious leaders. Avid’s Pro Tools has been the go to DAW for any professional studio for the past 20 years and although there have been rumors of Avid going out of business and the features in Pro Tools becoming dated, Pro Tools is still a viable option for studios worldwide. Logic Pro has risen to the fore-front of the industry in recent years due to its easy to use interface that is possible of producing professional results. Ableton Live strays away from a hardware instrument music environment to cater for electronic music users. Audio to MIDI is a main focus along with the critically acclaimed Max for Live used for live performances by many current EDM artists. Each individual DAW has its own pros and cons and comparing these can highlight which DAW is the best for what task.
Spectrophotometers and colorimeters are often used in the laboratory, when it is necessary to measure color accurately. Although we often use the terms interchangeably, colorimeter actually a little easier, but is also a bit less precise than the spectrophotometer
Data acquisition is the process of copying data. For computer forensics, it’s the task of collecting digital evidence from electronic media. There are two types of data acquisition: static acquisitions and live acquisitions.
Many oscilloscopes have on-screen cursors that let you take waveform measurements automatically on-screen, without having to count graticule marks. Basically, cursors are two horizontal lines for voltage measurements and two vertical lines for time measurements that you can move around the scree...
Meydenbauer began designing cameras that had all the main components that are required for photogrammetric instruments. These included the integration of a coordinate system for the image (which was created by crosshairs that projected on the photoplate during exposure) as well as a fixed focus used to define the principal distance or focal length (Albertz, 2007). Despite all this, Meydenbauer’s method of indirect measurements from images was not accepted and only after an abundance of technical improvements to his camera design and practical experiments did he succeed. This was 25 years after his original idea of the use of photographs for the survey and documentation of buildings (Klinkenberg,
The central unit is the basic part of the computer and includes all the main computer parts. It is the heart of the computer system. It is responsible for executing, or running the software. The software programs are translated into a series of codes made up of 1s to 0s that the CPU can understand. Every code means a certain operation should take place.
Digital camera is a very important tool nowadays. People would always want to save their memories in the shape of pictures that will last forever. People were amazed when the first ever camera introduced back in hundreds of years ago. At that time camera consisted of large and impractical components and it was very hard to use. In fact, it even took quite some time to develop the pictures on the paper. But now there are some products of digital camera that are very easy to use and with its pocket-sized feature, one can carry it everywhere. There are several advantages of using digital camera: very easy to use, easy to carry on, instant feedback; which means one can immediately review the captured pictures and erase any pictures that they don’t like. One real advantage of digital camera is that one can share the pictures with other people easily thanks to the high speed internet connection. Before digital camera one has to print pictures, paying for postage, and waiting for the pictures to be delivered. Gone were that days since it is possible now to share the pictures online within minutes.
I do not know much what an input device is even I have been using computer for many years. I thought that an input device is just a component inside the computer. I also did not know the role of input device play. I am among those people who do not care much about the component inside the computer. Now as I reflect, seems like I have ignored the importance of an input device.