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1.
INTERNATIONAL RESEARCH JOURNAL
OF ENGINEERING AND TECHNOLOGY (IRJET)E-ISSN: 2395-0056 VOLUME: 07 ISSUE: 03 | MAR 2020 WWW.IRJET.NET P-ISSN: 2395-0072 © 2020, IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified Journal | Page 3818 HUMAN EYE PUPIL DETECTION TECHNIQUE USING CENTER OF GRAVITY METHOD R. PRATHIPA, P.PREMKANNAN, K.RAGUNATHAN, R.VENKATAKRISHNAN. ASSOCIATE PROFESSOR, Department of Electronics and Communication Engineering Panimalar Institute of Technology, Chennai, India -----------------------------------------------------------------------------***------------------------------------------------------------------------- ABSTRACT: The performance of pupil recognition systems is considerably laid low with the segmentation accuracy, particularly in non-ideal iris pictures. This work proposes a quick and correct methodology to section the pupil notwithstanding the form employing a combination of morphological operations, double threshold and center of gravity methodology. In existing, Associate in Nursing edge-map generation technique for pupil detection in close to infrared (NIR) relies on generating 2 completely different edge-maps of same eye image victimisation mathematician filtering, image binarization and Sobel edge detection operations then combining them to one edge- map victimisation intersection operation on binary pictures. Center of gravity has planned a stimulating and computationally economical procedure for detection pupil region in iris pictures. Experimental results on the CASIA version four.0 iris databases have indicated a high level of accuracy victimisation the planned drastically within the edge-map of eye image, that is fascinating for correct and quick pupil detection. Field programmable logic array (FPGA) primarily based hardware implementation of the planned technique is bestowed, which may be employed in iris localization system on FPGA primarily based platforms for iris recognition application. I. Introduction Eyes movement state recognition is to analysis the way to sight the visual method of gazing accurately and non- intrusively. With the analysis of gazing direction, we will get the placement info of saccade choice and observation method in people’s variable observation, and take it as a channel of There area unit four types of eyes movement state, Vergence movement, VOR, saccades and swish pursuit, that manifest because the movement of pupil centre. The attention detection or eye hunter is that the sensing element technology that allows a tool to induce to grasp clearly wherever our eyes area unit cantered and it regulates our presence, attention, drowsiness, consciousness and alternative fatigue states. This intelligence shall be used for feat the deep correct and understanding in to client behaviour or to model the new interfaces across various devices. By connected the attention trailing with alternative input modules, as an example keyboard, mouse, and voice. using the eyes as a pointer at a screen the ways of eye trailing facilitates interoperation with nodes and alternative gadgets once the user unable to Iris localization could be a prime associated initial stage in an iris recognition formula, that involves detection of iris boundaries. II. Literature review Eye tracking is a technique used in perceptive science, iris recognition [6], human-computer Interaction[7], advertising, medical research, and other areas. One simple method [8] is a camera focused on eye and recording their movements as the observer looks at some kind of stimulus and then these records are processed by imageprocessing software. Most of the modern [9],[10] systems use infrared beams to create acorneal reflection, from which the angle of measure can be calculated. Most of them use a frequency of at least 30Hz to capture the details of the very rapid eye movements. In [11] zhu and Q. Ji proposed different eye detectionmethods like template, appearance, and feature based methods. The eyes were exactly detecting in these methods and also it is expensive in computational part. In [12], author given details a couple of quick eye detection theme to be used in video streams. In [13], author developed a face detection formula victimisation MCT and enzyme Boost. In [14], author developed an eye fixed detection methodology victimisation AdaBoost coaching with MCT-based eye options. Morphological techniques verify the image with a tiny low templet referred to as structuring part. III. PUPIL DETECTION ALGORITHM In this proposed system, morphology erosion ,dilation, double threshold and center of gravity is used for pupil detection. Fig : 1 Proposed Block Diagram
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INTERNATIONAL RESEARCH JOURNAL
OF ENGINEERING AND TECHNOLOGY (IRJET)E-ISSN: 2395-0056 VOLUME: 07 ISSUE: 03 | MAR 2020 WWW.IRJET.NET P-ISSN: 2395-0072 © 2020, IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified Journal | Page 3819 3.1 Gaussian Filter The smoothing of the first image removes the random noise and therefore the uneven intensities which will end in supernumerary false edges within the edge-detected image. It conjointly helps within the image binarization (image thresholding) step by reducing the false black pixels within the binary image. The Gaussian filter design is shown in Fig the first image is ironed employing a Gaussian filter. Fig 2: Gaussian filter hardware architecture The 3x3 filter mask or kernel (k) for Gaussian image performs convolution of k with the input image (I), which supplies the ironed image (IG). the weather of k area unit increased with corresponding pixels of image window to induce the weighted add as per atomic weight. The hardware design of Gaussian filter module implements the atomic weight. except for the adders, the design uses the shifters to hold out multiplication and division operations and shifting by over one bit is obtained in a very single clock cycle. The pipelined registers area unit introduced within the design to induce the output of 1 output pel per clock cycle. 3.2 Double Threshold Image binarization may be a vital reprocessing technology for the recognition of written literal amounts of checks, document image method, recognition of fingerprint footage, etc. Currently, many binarization ways are given, which could be classified primarily into two classes: world thresholding ways and accommodative thresholding ways. the globe thresholding ways are effective for footage with Associate in Nursing clearly bimodal bar chart. attributable to its poor robustness, however, world thresholding ways are not acceptable for footage with low distinction or non- uniform illumination. Otsu’s formula, a classical world thresholding methodology, reflects the intensity distribution of an image, but its property of 1 threshold ends up in poor robustness. although accommodative thresholding ways can pay attention of some advanced footage, they sometimes ignore the sting property and cause a fake shadow. throughout this work, we tend to tend to gift a different double-threshold image binarization methodology, that separates the pupil region from eye image. two thresholds are required to threshold the result. to reduce the resources used and so the latency, just like the quick methodology, two fixed thresholds are accustomed filter the result. The high threshold is prepared as a 1/6 of the largest magnitude through empirical observation. 3.3 Morphology closing Opening and motility unit 2 necessary operators from mathematical morphology. they're each derived from the essential operations of abrasion and dilation. Like those operators they're sometimes applied to binary footage, though there are grey level versions. The structuring 0.5, SE, got to be one structuring 0.5 object, as hostile academic degree array of objects. The morphological shut operation is additionally a dilation followed by academic degree erosion, exploitation identical structuring 0.5 for each Operations. A picture can endure a series of dilations and erosions exploitation identical, or generally absolutely utterly completely different structuring components. There unit 3 commonest mixtures of dilation and erosion: gap, closing and random transformation 3.4 Center of Gravity Morphology image have solely pupil region ab initio count the amount of black pixels within the image that provides density of black region. within the same manner calculate the accumulative total of x, y coordinates for corresponding the black pel positions. Divide the total values with count numbers which ends the common values of the region. This Values show the middle of the pupil region. If we tend to draw the circle in octave with this Centre values precisely match the pupil region.
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INTERNATIONAL RESEARCH JOURNAL
OF ENGINEERING AND TECHNOLOGY (IRJET)E-ISSN: 2395-0056 VOLUME: 07 ISSUE: 03 | MAR 2020 WWW.IRJET.NET P-ISSN: 2395-0072 © 2020, IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified Journal | Page 3820 Fig 3: X, Y center coordinates IV. ADVANTAGES OF PROPOSED PUPIL DETECTION METHOD Pupil detection technique Pupil detection forms a pre- processing stage to get rid of the redundant data from the input image, so dramatically reducing the quantity {of data of knowledge of data} to be processed whereas at a similar time conserving helpful information regarding the boundaries. So the pupil detection provides center coordinates of the pupil as x-coordinate and y-co-ordinate. V. RESULTS fig 4: Output Image with pupil detection Simulation of proposed technique is done by Modelsim and output is viewed through octave Fig 5: simulation waveform of pupil region VI.CONCLUSION Pupil detection may be a necessary step in several of medicine diagnostic applications and ought to be performed quickly. In most studies, pupil detection is handled with simple ways that lack accuracy and fail in high illumination cases. during this analysis article, dedicated hardware design and octave simulation for pupil detection is planned and enforced with success. so as to find eyes with totally different sizes, while not a lot of process work and numerous databases of various sizes for every image, AN economical design is developed. economical utilization of the offered hardware is noted within the discovered result. References [1] A. Basit, M.Y. Javed, Localization of iris in gray scale images using intensity gradient, Opt. Lasers Eng. 45 (12) (Dec. 2007) 1107–1114. [2] M. López, J. Daugman, E. Cantó, Hardware–software co- design of an iris recognition algorithm, IET Inf. Secur. 5 (1) (2011) 60. [3] K. Grabowski, A. Napieralski, Hardware architecture optimized for iris recognition, IEEE Trans. Circuits Syst. Video Technol. 21 (9) (2011) 1293–1303. [4] J. Liu-Jimenez, R. Sanchez-Reillo, B. Fernandez- Saavedra, Iris biometrics for embedded systems, IEEE Trans. Very Large Scale Integr. Syst. 19 (2) (Feb. 2011) 274–282. [5] J. Daugman, How iris recognition works, IEEE Trans. Circuits Syst. Video Technol. 14 (2004) 21–30. [6] F. Jan, I. Usman, S. Agha, Iris localization in frontal eye images for less constrained iris recognition systems, Digital Signal Process. A Rev. J. 22 (6) (2012) 971–986. [7] N. Wang, Q. Li, A.A.A. El-Latif, T. Zhang, X. Niu, Toward accurate localization and high recognition performance for noisy iris images, Multimedia Tools Appl. 71 (3) (2014) 1411–1430. [8] V. Kumar, A. Asati, A. Gupta, Iris localization based on integro-differential operator for unconstrained infrared iris images, in: proceedings of International Conference on Signal Processing, Computing and Control, JUIT, Sept 2015, Waknaghat, India, pp. 277–281. [9] H. Mehrotra, P.K. Sa, B. Majhi, Fast segmentation and adaptive SURF descriptor for iris recognition, Math. Comput. Model 58 (1–2) (2013) 132–146.
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INTERNATIONAL RESEARCH JOURNAL
OF ENGINEERING AND TECHNOLOGY (IRJET)E-ISSN: 2395-0056 VOLUME: 07 ISSUE: 03 | MAR 2020 WWW.IRJET.NET P-ISSN: 2395-0072 © 2020, IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified Journal | Page 3821 [10] F. Jan, I. Usman, S.A. Khan, S.A. Malik, A dynamic non- circular iris localization technique for non-ideal data, Comput. Electr. Eng. 40 (8) (2014) 215–226. [11] H. Ngo, R. Rakvic, R. Broussard, R. Ives, Resource- aware architecture design and implementation of Hough transform for a real-time iris boundary detection system, IEEE Trans. Consum. Electron. 60 (3) (2014) 485–492. [12] K.W. Bowyer, K. Hollingsworth, P.J. Flynn, Image understanding for iris biometrics: a survey, Comput. Vis. Image Underst. 110 (2) (May 2008) 281–307. [13] CASIA Iris Database: Available online at: http://www.cbsr.ia.ac.cn/english/ IrisDatabase.asp (accessed on 28 April 2016). [14] A. Elhossini, M. Moussa, A memory efficient FPGA implementation of Hough transform for line and circle detection, in: Proc. of the 25th Canadian Conference on Electrical and Computer Engineering, Montreal, QC, Canada, 29 April–2 May, 2012. [15] Z.-H. Chen, A.W.Y. Su, M.-T. Sun, Resource-efficient FPGA architecture and implementation of Hough transform, IEEE Trans. Very Large Scale Integr. (VLSI) Syst. 20 (8) (2012) 1419–1428. [16] S. Khalighi, F. Pak, P. Tirdad, U. Nunes, Iris recognition using robust localization and non subsampled contour let based features, J. Sign. Process. Syst. 81 (1) (2015) 111– 128. [17] J. Zuo, N.A. Schmid, On a methodology for robust segmentation of nonideal iris images, IEEE Trans. Syst. Man Cybern. Part B Cybern. 40 (3) (2010) 703–718. [18] R.P. Wildes, Iris recognition: an emerging biometric technology, Proc. IEEE 85 (9) (1997) 1348–1363.
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