17,744 Hits in 4.1 sec

Hybrid Frequency Domain Image Denoising of G-C Transform

2016 Revista Técnica de la Facultad de Ingeniería Universidad del Zulia  
Simulation experiments have indicated that compared with the standard Gabor transform and Contourlet transform, hybrid frequency domain image de-noising algorithm based on improved Gabor-Contourlet transform  ...  According to the poor performance of the Image De-noising Algorithm currently, this paper aims to propose a mixed frequency domain image de-noising based on improved Gabor-Contourlet transform.  ...  For example, taking a noisy image as the sample, standard Gabor transform and Contourlet transform are taken to image de-noising.  ... 
doi:10.21311/ fatcat:k22edbxcgbhzxmdchm4k7nmtxi

Windowing System Facial Detection based on Gabor Kernel Filter, Fast Fourier Transform, and Probabilistic Learning Vector Quantization

Arif Muntasa
2017 International Journal of Technology  
The training set images, for both facial and non-facial images, were processed to obtain the local features by using the Gabor kernel filter and the fast Fourier transform.  ...  The testing images were enhanced first before the detection process using four different enhancement methods: histogram equalization, adaptive histogram equalization, contrast limited adaptive histogram  ...  In the training process, the features searching process took 417.21 seconds for the 4,916 facial images and 665.37 seconds for the 7,960 non-facial images.  ... 
doi:10.14716/ijtech.v8i1.3255 fatcat:p4r56p6gordu7p5oz7c5k7443m

Detection and Segmentation of Cancer Regions in Oral MRI images using ANFIS Classification Method

2019 International journal of recent technology and engineering  
The enhanced image is transformed using Gabor transform and the features of the oral image are extracted from this transformed image.  ...  The quality of the image is improved using adaptive mean filter and enhanced using adaptive histogram equalization technique.  ...  The following steps are used for adaptive histogram equalization process. Step 1: Divide the filtered oral image into 8*8 non overlapping sub blocks.  ... 
doi:10.35940/ijrte.c5449.098319 fatcat:gszjcl5unbadneme2f57wisbmu

Seismic depth imaging with the Gabor transform

Yongwang Ma, Gary F. Margrave
2008 Geophysics  
The Gabor depth imaging algorithm approximates generalized phase-shift-plus-interpolation (GPSPI) wavefield extrapolation using a Gabor, or windowed Fourier, transform to localize the wavefield.  ...  In this paper, we present a new prestack seismic migration algorithm using the Gabor transform with application to the Marmousi acoustic dataset.  ...  Acknowledgments We would like to show our thanks to the sponsors of the CREWES project and the POTSI project; we are also grateful for all the financial and other supports from NSERC, PIMS, MITACS.  ... 
doi:10.1190/1.2903821 fatcat:iwt5zkmqubgede7z34mhr3ym3a

Adaptive smoothing respecting feature directions

R.A. Carmona, Sifen Zhong
1998 IEEE Transactions on Image Processing  
Accurate extraction of the image feature directions is essential to image smoothing and other image processing tasks.  ...  We have developed two new methods: the Hessian method, an approach using higher order differentiations, and the Gabor method, an approach using space-frequency analysis.  ...  Given an image , its Gabor transform is given by The Gabor transform is the Fourier transform of the image after being windowed by a Gaussian window function shifted to each location.  ... 
doi:10.1109/83.661185 pmid:18276255 fatcat:efusdqlpjbe3bghwlxxbwlx5qm

Vein palm recognition model using fusion of features

Qassim Abd Al-hussain Hadi
2020 TELKOMNIKA (Telecommunication Computing Electronics and Control)  
In this work proposed model are suggested that contain four stages to reach the results: in the first stage is the pre-processing stage where histogram equation was used to enhance the image and the properties  ...  These results were obtained after several tests and using the Gabor filter with 2D-discrete wavelet transform and principal component analysis (PCA), I got the best results.  ...  Preprocessing based on adaptive histogram equalization The adaptive histogram equation is used to improve the image and enhance it before the phase of part of preprocessing, but after the process of reformulating  ... 
doi:10.12928/telkomnika.v18i6.16149 fatcat:n7lci23qj5bwvccqbg2bkjibem

A fast learning algorithm for Gabor transformation

A. Ibrahim, M.R. Azimi-Sadjadi
1996 IEEE Transactions on Image Processing  
Abstract-An adaptive learning approach for the computation of the coefficients of the generalized nonorthogonal 2·D Gabor transform representation is introduced in this correspondence.  ...  The aim is to achieve minimum mean squared error for the reconstructed image from the set of the Gabor coefficients.  ...  The primary objective of this correspondence is to find a solution to these problems by introducing an adaptive learning for the Gabor transform computation.  ... 
doi:10.1109/83.481685 pmid:18285104 fatcat:nvu6q46ejrcyln42ldmhfktwmi

Performance Observation of Gabor Filter for Wall Thickness Measurement of Human Colon Based on Ultrasound Image

C. Pahl
2014 International Journal of Information and Electronics Engineering  
In order to obtain clear image and ensure measurement accuracy, several steps of image processing; pre-processing, filtering, cropping, and textural segmenting were done.  ...  Wall thickness is important parameters for evaluating the condition of colon, especially for the people with irritable bowel condition.  ...  Adaptive Median Filter Gabor filter is used for edge detection and extraction of texture features.  ... 
doi:10.7763/ijiee.2014.v4.429 fatcat:v2xvn7s475bwrd67zczshijowe

Research on Finger Vein Image Segmentation and Blood Sampling Point Location in Automatic Blood Collection

Xi Li, Zhangyong Li, Dewei Yang, Lisha Zhong, Lian Huang, Jinzhao Lin
2020 Sensors  
Firstly, Gabor filter parameter can be set adaptively according to the differential excitation of image and we use the local binary pattern (LBP) to fuse the same-scale and multi-orientation Gabor features  ...  In order to accurately locate the blood sampling point in the venous area, we propose a new finger vein image segmentation approach basing on Gabor transform and Gaussian mixed model (GMM).  ...  Institutional Review Board Statement: Ethical review and approval were waived for this study, due to the research is mainly on finger-vein image segmentation and location of blood collection point on image  ... 
doi:10.3390/s21010132 pmid:33379213 pmcid:PMC7795357 fatcat:vqwaavxubfa3lhl6vfc62vodhy

A Comparison and Evaluation of Computerized Methods for Blood Vessel Enhancement and Segmentation in Retinal Images

Safia Shabbir, Anam Tariq, M. Usman Akram
2013 International Journal of Future Computer and Communication  
Index Terms-Blood vessel, DIABETIC retinopathy (DR), retinal images, unsharp masking, gabor wavelet transform, adaptive thresholding, log filtering, enhancement, segmentation.  ...  Experimental results show that Gabor wavelet method gives best results for vessel enhancement and global threshold gives good results for vessel segmentation in retinal images.  ...  transform. 3) The 2-D Gabor wavelet is defined in (6)  ... 
doi:10.7763/ijfcc.2013.v2.235 fatcat:esgjswoxunbnxg2en7zk5oi4fy

Wavelet compression of digital holograms: Towards a view-dependent framework

Kartik Viswanathan, Patrick Gioia, Luce Morin, Andrew G. Tescher
2013 Applications of Digital Image Processing XXXVI  
It is observed that Gabor wavelet bases have better time-frequency localization as compared to Fresnelet bases and hence are well suited for view-dependent compression techniques for hologram reconstruction  ...  An analysis and discussion on the relevance of various wavelet schemes for hologram compression and reconstruction when the rendering configuration makes it possible to exploit selective refinements to  ...  This is evident from the fact that each rotation angle and scale of the gabor wavelet produces one transformed image.  ... 
doi:10.1117/12.2027199 fatcat:67bzy6ioqbe6jpw3vzphaacplu

Traditional Indian Painting Retrieval System Based On Curvelet Transform And Comparison The Result Using Gabor Filter

Priya Saxena Pooja Manjarekar
2016 Zenodo  
As we are well known about the hierarchy of spectral methods of texture feature extraction starting from Fourier Transform (FT) to the latest Gabor filter transform, which became very popular for many  ...  As mentioned earlier Curvelet transform will be applied to get the result. In the second part of this paper we shall also compare the result with Gabor transform.  ...  The approach presents a low degree of complexity, for this reason makes it suitable for real-time applications by using Gabor wavelet feature extraction. Low pass filter has been used for processing.  ... 
doi:10.5281/zenodo.55631 fatcat:63lkiix4zzbzbcggdp4abyj7zu

Literature Review On Fingerprint Level 1 And Level 2 Features Enhancement To Improve Quality Of Image

K. Krishna Prasad., Sreeramana Aithal
2017 Zenodo  
Level1 features are used for image enhancement and orientation purpose.  ...  In the physiological traits, Fingerprint is most commonly utilized the biometric feature in diverse fields for identification and verification purpose.  ...  The different methods used for image enhancement are wavelet transform, Gabor Filter, Log Gabor filter, Directional filter, Elliptical Gabor filter, Adaptive Filtering and much more similar types of filtering  ... 
doi:10.5281/zenodo.835607 fatcat:6pya2tfod5ag7jl6vf6u7ry3hq

A Framework for Face Recognition Using Adaptive Binning and Adaboost Techniques

A Srinivasan
2011 The International Journal of Multimedia & Its Applications  
In this paper, a novel framework for face recognition is developed by using adaptive binning and adaboost technique.  ...  The main feature of this system is a unified model for assessing all the probe sets of the face images and best results are thus achieved.  ...  The Gabor transformation of a given image is defined as its convolution with the Gabor function: ‫ܩ‬ ௨,௩ ሺ‫ݖ‬ሻ ൌ ‫ܫ‬ሺ‫ݖ‬ሻ ‫כ‬ ߖ ௨,௩ ሺ‫ݖ‬ሻ where ‫ݖ‬ ൌ ሺ‫,ݔ‬ ‫ݕ‬ሻ denotes the image position, the symbol "  ... 
doi:10.5121/ijma.2011.3107 fatcat:ykxshqnbabhzxhlydfottqwqbe

Scale multiplication in odd Gabor transform domain for edge detection

Zhenfeng Zhu, Hanqing Lu, Yao Zhao
2007 Journal of Visual Communication and Image Representation  
In this paper, we propose an adaptive edge detection technique based on scale multiplication in odd Gabor transform domain (ESMG).  ...  In determining the threshold for the sharpened edge response, an adaptive strategy is applied, in which the nonlinear relation of the threshold with the mean and variance of exponential distribution is  ...  Conclusion We proposed an adaptive edge detection technique based on the multi scale analysis in odd Gabor transform domain (ESMG).  ... 
doi:10.1016/j.jvcir.2006.10.001 fatcat:bffccf7pkjdxfn5brvyxfvehku
« Previous Showing results 1 — 15 out of 17,744 results