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Edge aware grey image enlargement

Cheng-Hsiung Hsieh, Ching-Hua Liu, Wei-Lung Hung, Qiangfu Zhao
2011 2011 3rd International Conference on Awareness Science and Technology (iCAST)  
To deal with the problem, this paper presents an edge aware grey image enlargement approach (EAGIE) which is based on onedimensional grey polynomial interpolation (1-D GPI).  ...  Interpolation-based approaches for image enlargement generally suffer from the problem of blurry and jagged edge.  ...  By this doing, edges of enlarged images were enhanced. In [13] , the one-dimensional grey polynomial interpolation (1-D GPI) was proposed for image enlargement.  ... 
doi:10.1109/icawst.2011.6163128 dblp:conf/icawst/HsiehLHZ11 fatcat:dda77ip2xbdefikp6isrt2umty

Applications of fluorescence lifetime imaging in clinical medicine

Zhanwen Wang, Yanping Zheng, Deqiang Zhao, Ziwei Zhao, Lixin Liu, Artem Pliss, Feiqi Zhu, Jun Liu, Junle Qu, Ping Luan
2018 Journal of Innovative Optical Health Sciences  
This article proposed a novel classification on fluorescence imaging for clinical applications, and presented a camera-based instrument to verify the functions by an animal mode.  ...  ratio in photodynamic therapy (PDT) for skin cancer.  ...  , intended for interpolating data points on a two dimensional common grid.  ... 
doi:10.1142/s179354581830001x fatcat:tnptloxraneuvhpmswadsv2k2y

Block effect reduction by the 1-D gray polynomial interpolation

Cheng-Hsiung Hsieh, Ren-Hsien Huang
2010 Digital signal processing (Print)  
In this paper, the one-dimensional grey polynomial interpolation (1-D GPI) developed for image enlargement in [27] is applied to reduce the block effect in the block discrete cosine transform (BDCT) image  ...  Second, the down sampled image/frame is put into a BDCT coder, such as the JPEG and the MPEG-2. Finally, the 1-D GPI is applied to enlarge the decoded image.  ...  To relieve the problems, this paper propose a novel approach, based on one-dimension grey polynomial interpolation (1-D GPI), to reduce the block effect in the BDCT coder.  ... 
doi:10.1016/j.dsp.2009.12.012 fatcat:pcvcf6mi4je7hme75kywrevauy

Landmark-based elastic registration using approximating thin-plate splines

K. Rohr, H.S. Stiehl, R. Sprengel, T.M. Buzug, J. Weese, M.H. Kuhn
2001 IEEE Transactions on Medical Imaging  
Experimental results are presented for two-dimensional as well as 3-D tomographic images of the human brain.  ...  To localize landmarks we use a semi-automatic approach which is based on three-dimensional (3-D) differential operators.  ...  Jungnickel for providing the MR images showing the susceptibility distortions. They would also like to thank W. P. Th. M. Mali, L. Ramos, and C. W.  ... 
doi:10.1109/42.929618 pmid:11437112 fatcat:v6aunrp3oveydmnorvguec4ecm

Survey: interpolation methods in medical image processing

T.M. Lehmann, C. Gonner, K. Spitzer
1999 IEEE Transactions on Medical Imaging  
Image interpolation techniques often are required in medical imaging for image generation (e.g., discrete back projection for inverse Radon transform) and processing such as compression or resampling.  ...  This results in three novel kernels, which are introduced in this paper and proven to be within the best choices for medical image interpolation: the 6 2 6 Blackman-Harris windowed sinc interpolator, and  ...  Gröndahl, Göteborg University, Göteborg, Sweden, for providing the radiographs for this research. Many thanks also to S. and R.  ... 
doi:10.1109/42.816070 pmid:10661324 fatcat:ooccmrqrp5dlzmbp2upxrczz4e

Temporal error concealment based on grey polynomial interpolation

Cheng-Hsiung Hsieh, Ching-Hua Liu, Kuan-Chieh Hsiung
2011 Proceedings of 2011 IEEE International Conference on Grey Systems and Intelligent Services  
In this paper, an error concealment approach based on grey polynomial interpolation is proposed.  ...  One popular approach to deal with the problem is error concealment since no burden on bandwidth is loaded.  ...  In [9] , the GPI was applied to image enlargement which is a spatial interpolation.  ... 
doi:10.1109/gsis.2011.6044063 fatcat:xcqrxopl2bgstlaimtt363vg6e

Image Resolution Enhancement in Satellite Based On Discrete Wavelet Transform

Bejugam jyothi, G ramesh
2014 IOSR Journal of Electronics and Communication Engineering  
In this project, I propose a new satellite image resolution enhancement technique based on the interpolation of the high-frequency sub bands obtained by discrete wavelet transform (DWT) and the input image  ...  In order to achieve a sharper image, an intermediate stage for estimating the high frequency sub bands has been proposed.  ...  Bicubic produces smoother edges than other two methods. bicubic interpolation is an extension of cubic interpolation for interpolating data points on a two dimensional regular grid.  ... 
doi:10.9790/2834-09545261 fatcat:w6lpqpmmtbfz5hdsm3x4gdtrvi

Digital Reconstruction and Display of Compound Scan Ultrasound Images

D.E. Robinson
1984 IEEE Transactions on Sonics and Ultrasonics  
Use of an appropriate interpolation scheme can greatly improve image quality and at the same time reduce the required tine density and hence increase the frame rate.  ...  In scan conversion, the method of allocation of image values in pixels not intersected by scan lines has a dramatic effect on the image quality.  ...  (c) Linear interpolation of (b). (d) Two-dimensional interpolation.  ... 
doi:10.1109/t-su.1984.31520 fatcat:njazjlydtfdk7oor5ai7yrdtoi

A Low-cost VLSI Design of Extended Linear Interpolation for Real Time Digital Image Processing

Chung-chi Lin, Ming-hwa Sheu, Huann-keng Chiang, Zeng-chuan Wu, Jia-yi Tu, Chia-hung Chen
2008 2008 International Conference on Embedded Software and Systems  
The simulation results demonstrate that the efficient VLSI of extended linear interpolation at 267MHz with 25980 gates in a 450 × 450μm 2 chip is able to process digital image scaling for HDTV in real-time  ...  This paper presents a novel image interpolation method, extended linear interpolation, which is a low-cost and high-speed architecture with interpolation quality compatible to that of bi-cubic convolution  ...  INTRODUCTION Digital image scaling has a variety of applications; for instance, scaling up is used to enlarge images for HDTV or medical image display and scaling down is applied to shrink images to fit  ... 
doi:10.1109/icess.2008.85 dblp:conf/icess/LinSCWTC08 fatcat:wwgzb2odgrfujclnm4ogkt4oxq

Reconstructing leaf growth based on non-destructive digitizing and low-parametric shape evolution for plant modelling over a growth cycle

Michael Henke, Stephan Huckemann, Winfried Kurth, Branislav Sloboda
2014 Silva Fennica  
Reconstructing leaf growth based on non-destructive digitizing and low-parametric shape evolution for plant modelling over a growth cycle. Silva Fennica vol. 48 no. 2 article id 1019. 23 p.  ...  As an improvement of this contour modelling method, a set of parameterized polynomials was used. To model the temporal kinetics of the shape, geodesics in shape spaces were employed.  ...  For every coefficient, we interpolated dependencies on leaf length by a sixth order polynomial.  ... 
doi:10.14214/sf.1019 fatcat:4c7r6lynczfuveytpuzqrjt2v4

Three-dimensional analysis of the geometry of individual multiple sclerosis lesions: Detection of shape changes over time using spherical harmonics

Daniel Goldberg-Zimring, Anat Achiron, Charles R.G. Guttmann, Haim Azhari
2003 Journal of Magnetic Resonance Imaging  
Ten in vivo MS lesions were identified from sets of axial MR images acquired from a patient scanned consecutively for 24 times during a one-year period.  ...  Conclusion: Quantitative three-dimensional shape analysis can serve as a new tool for monitoring MS lesion activity and study patterns of MS lesion evolution over time.  ...  Roshni Patel for technical assistance, and Prof. Jacob Rubinstein, Dr. Dominik Meier, and Oleg Michaelovich for their useful advice.  ... 
doi:10.1002/jmri.10365 pmid:12938123 fatcat:kx55dvcjmna6dnbvgct3m72gzu

Feature recognition method for similar key points of human face based on adaptive median filter

Jing Liu
2021 International Journal of Biometrics (IJBM)  
The grey level of the input image is mapped to the output image pixel by function mapping to achieve histogram homogenisation of the grey face image.  ...  In order to overcome the low efficiency and poor accuracy of current face feature recognition methods, this paper proposes a feature recognition method for similar key points of human face based on adaptive  ...  This method divides the face image, and calculates the polynomial coefficient. Based on the polynomial coefficient matrix, the symmetry matrix is calculated.  ... 
doi:10.1504/ijbm.2021.112211 fatcat:lwvwqj6abja5jdenufvaeghzme

A chronology of interpolation: from ancient astronomy to modern signal and image processing

E. Meijering
2002 Proceedings of the IEEE  
This paper presents a chronological overview of the developments in interpolation theory, from the earliest times to the present date.  ...  It brings out the connections between the results obtained in different ages, thereby putting the techniques currently used in signal and image processing into historical perspective.  ...  Extensions to the interpolation of tree-like image structures [333] and even ordinary grey-level images [334] , [335] have also been made.  ... 
doi:10.1109/5.993400 fatcat:jkcmav45gvhotehzcp3a2ii3ry

Comparison of spatial normalization procedures and their impact on functional maps

Fabrice Crivello, Thorsten Schormann, Nathalie Tzourio-Mazoyer, Per E. Roland, Karl Zilles, Bernard M. Mazoyer
2002 Human Brain Mapping  
Simple affine (AFF), fifth order polynomial warp (WRP), discrete cosine basis functions (SPM), and a movement model based on full multi grid (FMG) approaches were applied on the same dataset for warping  ...  Thanks to the large number of degrees of freedom of the technique, FMG was found to provide enhanced alignment accuracy as compared to the other three methods, both for the grey and white matter tissues  ...  Papathanassiou for his help in acquiring the anatomical and functional datasets used in this study.  ... 
doi:10.1002/hbm.10047 pmid:12112765 fatcat:6jtduplgnvbdfcqpys7ilkiw2u

A Geometric Algorithm for Ray/Bézier Surfaces Intersection Using Quasi-Interpolating Control Net

Yohan D. Fougerolle, Sandrine Lanquetin, Marc Neveu, Thierry Lauthelier
2008 2008 IEEE International Conference on Signal Image Technology and Internet Based Systems  
for very simple projections and 2D intersection tests to determine sub-patches containing a potential intersection.  ...  The novelty of our approach resides in the use of bounds of the difference between a Bézier patch and its quasi-interpolating control net.  ...  In grey is the surface, in red are the ray, the intersections detected and approximated normals, in green is the quasi-interpolating polygons constructed, in black the corresponding Bezier nets on a) and  ... 
doi:10.1109/sitis.2008.24 dblp:conf/sitis/FougerolleLNL08 fatcat:6saab56pk5fjldf2vzwrkepgwy
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