{"id":115,"date":"2017-08-07T16:27:46","date_gmt":"2017-08-07T21:27:46","guid":{"rendered":"http:\/\/utsaengineer.wpengine.com\/agrigoryan\/?page_id=115"},"modified":"2025-04-26T11:44:33","modified_gmt":"2025-04-26T16:44:33","slug":"slides-and-posters-from-presentations","status":"publish","type":"page","link":"https:\/\/ceid.utsa.edu\/agrigoryan\/slides-and-posters-from-presentations\/","title":{"rendered":"Slides and Posters from Presentations"},"content":{"rendered":"

\u00a0<\/span><\/b> New Poster<\/span><\/b><\/span><\/span><\/p>\n

SPIE Defense + Commercial Sensing 2025, Conference 13457: Multimodal Image Exploitation and Learning 2025<\/em><\/span><\/strong><\/p>\n

1.\u00a0 A.M. Grigoryan, S. White, S.S. Agaian, “A Novel Approach to Image Enhancement Using a 2\u00d72 Processing Model for Color-to-Grayscale Mapping,” 13457-23 (April 15, 2025) (view poster<\/a>)<\/span><\/p>\n

SLIDES<\/span><\/b><\/span><\/span><\/p>\n

SPIE, Defense + Commercial Sensing, Multimodal Image Exploitation and Learning 2023,<\/em><\/span><\/strong> \u00a0May 2023<\/span><\/span><\/p>\n

1.\u00a0 A.M. Grigoryan, I. Salazar, S.S. Agaian, \u201cNew method of color image histogram equalization with gray replacement for underwater and medical images,\u201d<\/strong><\/span>\u00a0(view presentation<\/a>)<\/span>\u00a0<\/span><\/p>\n

2.\u00a0 E. Oluga, B. Young, R.L. Hood, and A.M. Grigoryan, \u201cAlpha-rooting color image enhancement for neural light field rendering,\u201d<\/strong>\u00a0(view presentation<\/a>)<\/span>\u00a0<\/span><\/p>\n

SPIE, Defense + Commercial Sensing, Multimodal Image Exploitation and Learning 2022,<\/em><\/span><\/strong> \u00a0April 2022<\/span><\/span><\/p>\n

1.\u00a0 A.M. Grigoryan, S.S. Agaian, \u201cAlpha-rooting and correlation method of image enhancement,\u201d<\/strong><\/span>\u00a0(view presentation<\/a>)<\/span>\u00a0<\/span><\/p>\n

2.\u00a0 A.M. Grigoryan, S.S. Agaian, \u201cGradients and compass operators: Method of rotations,\u201d<\/strong><\/span>\u00a0(view presentation<\/a>)<\/span>\u00a0<\/span><\/p>\n

SPIE, Defense + Commercial Sensing, Mobile Multimedia\/Image Processing, Security, and Applications 2020,<\/em><\/span><\/strong> \u00a0April 2020<\/span><\/span><\/p>\n

1.\u00a0 A.M. Grigoryan, S.S. Agaian, \u201cOptimal restoration of multiple signals in quaternion algebra,\u201d<\/span><\/strong><\/span>\u00a0(view presentation<\/a> to see how the problem of optimal restoration of quaternion signals in the model\u00a0 convolution plus noise was solved \/ Art)<\/span>\u00a0<\/span><\/p>\n

2. A.M. Grigoryan, S.S. Agaian, \u201cGradient, means, and image reconstruction,\u201d<\/strong> <\/span>(view presentation<\/a>)<\/span>\u00a0<\/span><\/p>\n

3. A.M. Grigoryan, S.S. Agaian, \u201cQuaternion quantum image representation: New models,\u201d (view presentation<\/a>)<\/span><\/p>\n

4. A.M. Grigoryan, S.S. Agaian, \u201cThermal and night vision image visibility and enhancement,\u201d (view presentation<\/a>)<\/span><\/span><\/p>\n

SPIE, Defense + Commercial Sensing, Mobile Multimedia\/Image Processing, Security, and Applications 2019,<\/em><\/span><\/strong> Baltimore, Maryland, 4-18 April 2019<\/span><\/span><\/p>\n

1.\u00a0 A.M. Grigoryan, S.S. Agaian, \u201cGradient based histogram equalization in grayscale image enhancement,\u201d (view pdf-file<\/a> 2.9MB)<\/span>\u00a0<\/span><\/p>\n

2.\u00a0 A.M. Grigoryan, S.S. Agaian, \u201cAsymmetric and symmetric gradient operators with application in face recognition in Renaissance Portrait Art,\u201d (view pdf-file<\/a> 3.3MB)<\/span><\/span><\/p>\n

3.\u00a0 A.M. Grigoryan, A. John, S.S. Agaian, \u201cQuaternion alpha-rooting image enhancement of grayscale images\u201d<\/span><\/span>\u00a0(view pdf-file<\/a> 1.9MB)<\/span><\/span><\/p>\n

IS&T International Symposium, Electronic Imaging: Algorithms and Systems, <\/i><\/span><\/strong>28 Jan.-2 Feb., Burlingame, CA, 2018.<\/span><\/span><\/p>\n

1.\u00a0 A.M. Grigoryan, S.S. Agaian, \u201cColor facial image representation with new quaternion gradients,\u201d (view pdf-file<\/a> 1.36MB)<\/span><\/p>\n

2.\u00a0 A.M. Grigoryan, A. John, S.S. Agaian, \u201cEnhancement of underwater color images by two-side 2-D quaternion discrete Fourier transform\u201d (view pdf-file<\/a> 2.02MB)<\/span><\/p>\n

3.\u00a0 A.M. Grigoryan, A. John, S.S. Agaian, \u201cColor visibility images and measures of image enhancement<\/span>\u201d (view pdf-file<\/a> 1.26MB)\u00a0<\/span><\/span><\/p>\n

4.\u00a0 A.M. Grigoryan, S.S. Agaian, \u201cTwo general models for gradient operators in imaging\u201d\u00a0 (view pdf-file<\/a> 1.13MB)\u00a0<\/span><\/span> <\/span><\/p>\n

SPIE, Defense + Commercial Sensing, Mobile Multimedia\/Image Processing, Security, and Applications,<\/em> <\/span><\/strong>Orlando, Florida, 16-17 April 2018<\/span><\/span><\/p>\n

1.\u00a0 A.M. Grigoryan, S.S. Agaian, \u201cRe-Coloring of grayscale images: Models with Aesthetic and Golden proportions,\u201d (view pdf-file<\/a> 1.78MB)<\/span>\u00a0<\/span><\/p>\n

2.\u00a0 A.M. Grigoryan, A. John, S.S. Agaian, \u201cA novel image enhancement method of 3-D medical images by transforming the 3-D images to 2-D grayscale images\u201d<\/span><\/span>\u00a0(view pdf-file<\/a> 2.49MB)<\/span><\/span><\/p>\n

<\/b>Electronic Imaging 2017: Society for Imaging Science and Technology, <\/b>29 Jan.-2 Feb., Burlingame, CA<\/span><\/span><\/p>\n

1.\u00a0 A.M. Grigoryan, S.S. Again, \u201c2-D Octonion Discrete Fourier Transform: Fast Algorithms,” <\/span> (view pdf-file<\/a>)<\/span><\/p>\n

2.\u00a0 A.M. Grigoryan, S.S. Again, \u201cAlpha-Rooting Method of Gray-scale Image Enhancement in The Quaternion Frequency Domain,\u201d <\/span> (view pdf-file<\/a>)<\/span><\/p>\n

Electronic Imaging 2016: Algorithms and Systems XIV, <\/b>Feb. 14-18, San Francisco, CA <\/span>\u00a0<\/span><\/span><\/p>\n

1.\u00a0 A.M. Grigoryan, S.S. Agaian, \u201c2-D Left-side quaternion discrete Fourier transform fast algorithms,\u201d <\/span> (view pdf-file 1,55MB<\/a>)<\/span><\/p>\n

SPIE 2016: Mobile Multimedia\/Image Processing, Security, and Applications, <\/b>April 17-21, Baltimore, Maryland <\/span>\u00a0\u00a0\u00a0<\/span><\/span><\/p>\n

1.\u00a0 A.M. Grigoryan, S.S. Agaian, \u201c2D Hexagonal quaternion Fourier transform in color image processing,\u201d <\/span> (view pdf-file<\/a>)<\/span><\/p>\n

SPIE DSS 2015 DEFENSE, SECURITY, AND SENSING,<\/b> Baltimore, Maryland<\/span><\/p>\n

1.\u00a0\u00a0\u00a0 A.M. Grigoryan, B.A. Wiatrek, S.S. Again, \u201cImage encryption by redirection and cyclical shift,\u201d <\/span> (view pdf-file 4,69MB<\/a>\u00a0)<\/span><\/p>\n

2.\u00a0\u00a0\u00a0 A.M. Grigoryan, S.S. Again, A.M. Gonzales, \u201cFast Fourier transform-based retinex and alpha-rooting color image enhancement,\u201d <\/span> (view pdf-file 1,66MB<\/a>)<\/span><\/p>\n

ASEE-GSW CONFERENCE, 3\/26\/2015, SAN ANTONIO, TX <\/span><\/b><\/span><\/p>\n

1.\u00a0\u00a0\u00a0 A.M. Grigoryan, S.S. Agaian, J. Jenkinson, “Innovating Engineering Education:Teaching Image Processing In Texas” <\/span> (view pdf-file 1,661MB<\/a>)<\/span><\/p>\n

SPIE 2015 CONFERENCE ON ELECTRONIC IMAGING, <\/span><\/b>San Francisco, CA<\/span><\/span><\/p>\n

1.\u00a0\u00a0\u00a0 A.M. Grigoryan, “Fourier Transform with Rotations on Circles and Ellipses in Signal and Image Processing” <\/span> (view pdf-file 631kB<\/a>)<\/span><\/p>\n

2.\u00a0\u00a0\u00a0 A.M. Grigoryan, “Fast Heap Transform-Based QR-Decomposition of Real and Complex Matrices: Algorithms and Codes” <\/span> (view pdf-file 111kB<\/a>)<\/span><\/p>\n

3.\u00a0\u00a0\u00a0 A.M. Gonzales and A.M. Grigoryan, “Fast RETINEX for Color Image Enhancement: Methods and Algorithms” <\/span> (view pdf-file 1,438MB<\/a>)<\/span><\/p>\n

4.\u00a0\u00a0\u00a0 J. Jenkinson, A.M. Grigoryan and S.S. Agaian, “Enhancement, Preprocessing, and Machine Learning with Galaxy Images <\/span> (view pdf-file 1,537MB<\/a>)<\/span><\/p>\n

5.\u00a0\u00a0\u00a0 A.M. Grigoryan and S.S. Agaian, “New 2-D Discrete Fourier Transforms in Image Processing” <\/span> (view pdf-file 2,082MB<\/a>)<\/span><\/p>\n

6.\u00a0\u00a0\u00a0 A.M. Grigoryan and S.S. Agaian, “Algorithms of the q2r\u00d7q2r-point 2-D Discrete Fourier Transform” <\/span> (view pdf-file 1,978MB<\/a>)<\/span><\/p>\n

7.\u00a0\u00a0\u00a0 A.M. Grigoryan and S.S. Agaian, “Optimal Color Image Restoration: Wiener Filter and Quaternion Fourier Transform” <\/span><\/p>\n

SPIE 2014 CONFERENCE ON ELECTRONIC IMAGING,<\/span><\/b> San Francisco, CA<\/span><\/span><\/p>\n

1.\u00a0\u00a0\u00a0 A.M. Grigoryan and Nan Du, “Novel Tensor Transform-Based Method of Image Reconstruction From Limited-Angle Projection Data” <\/span> (view pdf-file 1,757MB<\/a>)<\/span><\/p>\n

2.\u00a0\u00a0\u00a0 A.M. Grigoryan and S.S. Agaian, “Alpha-Rooting Method of Color Image Enhancement by Discrete Quaternion Fourier Transform” <\/span> (view pdf-file 2,948MB<\/a>)<\/span><\/p>\n

3.\u00a0\u00a0\u00a0 A.M. Grigoryan and S.S. Agaian, “Fibonacci Thresholding: Signal Representation and Morphological Filters” <\/span> (view pdf-file 3,250MB<\/a>)<\/span><\/p>\n

4.\u00a0\u00a0\u00a0 A.M. Grigoryan and M. Hajinoroozi, “A novel method of filtration by the discrete heap transforms” <\/span> (view pdf-file 2,379MB<\/a>)<\/span><\/p>\n

IEEE International Conferences on on Systems, Man, and Cybernetics, (SMC 2014, 2009)<\/b><\/span><\/p>\n

1.\u00a0\u00a0\u00a0 A.M. Grigoryan, “Elliptic discrete Fourier transforms of Type II,” <\/span> (view pdf-file 1,5 MB<\/a>)<\/span><\/p>\n

2.\u00a0\u00a0\u00a0 A.M. Grigoryan and Nan Du, “New formula for image reconstruction from projections by the 2-D paired transformation,” <\/span> (view pdf file (1,5 MB)<\/a> )<\/span><\/p>\n

3.\u00a0\u00a0\u00a0 Khalil Naghdali, R. Raghunath, and A.M. Grigoryan, “Fast signal-induced transforms in image enhancement,” <\/span> (view pdf file (471 kB)<\/a>)<\/span><\/p>\n

4.\u00a0\u00a0\u00a0 Nan Du, Sree Devineni, and A.M. Grigoryan, “Mixed Fourier transforms and image encryption,” <\/span> (view pdf file (1,250 MB)<\/a>)<\/span><\/p>\n

5.\u00a0\u00a0\u00a0 J. Jenkinson, A.M. Grigoryan, M. Hajinoroozi, R.D. Hern\u00e1ndez, et el., “Machine Learning and Image Processing in Astronomy” <\/span> (view pdf file (1,391 MB) )<\/span><\/p>\n

SPIE 2009 CONFERENCES ON DEFENCE, SECURITY AND SENSING, ELECTRONIC IMAGING<\/b><\/span><\/p>\n

1.\u00a0\u00a0 A.M. Grigoryan and K. Naghdali, “Fast unitary heap transforms: Theory and application in cryptography” [7351-16], International Conference Mobile Multimedia\/Image Processing, Security, and Applications 2009, DSS09 SPIE Defense, Security, and Sensing 2009, Orlando, FL, USA, April 13-17, 2009. <\/i> <\/span> (view pdf file (3.6 MB)<\/a>)<\/span><\/p>\n

2.\u00a0\u00a0\u00a0 A.M. Grigoryan and M.M. Grigoryan, “Discrete integer Fourier transform in real space: Elliptic Fourier transform” [7245A-1], International Conference: Electronic Imaging, Science and technology, IS&T\/SPIE 21st Annual Symposium,<\/i> San Diego, CA, 18-22 January, 2009. <\/span> (view pdf file (513 kB)<\/a>)<\/span><\/p>\n

OTHER CONFERENCES (2007:-1:2002)<\/span> <\/b><\/span><\/p>\n

1.\u00a0\u00a0\u00a0 O. Kallioniemi, J. Kononen, L. Bubendorf, A. Kallioniemi, D. Rohwer-Nutter, E.R. Dougherty, A.M. Grigoryan, G. Sauter, P. Schraml, H. Moch, M. Mihatsch, “High-throughput FISH on chips,”<\/span> San Jose 2000, <\/span> (view pdf file (637 kB)<\/a>)<\/span><\/p>\n

2.\u00a0\u00a0\u00a0 F.T. Arslan and A.M. Grigoryan, “Enhancement of biomedical images by the paired transform,” The 14th IEEE International Conference on Image Processing, <\/i> San Antonio, Texas, September 16-19, 2007. <\/span> (view pdf file (511 kB)<\/a>)<\/span><\/p>\n

3.\u00a0\u00a0\u00a0 F.T. Arslan and A.M. Grigoryan, “Alpha-rooting image enhancement by paired splitting-signals,” The 3rd IEEE International Symposium on Biomedical Imaging: from Macro to Nano, ISBI 2006, <\/i> Arlington, VA, April 6-9, 2006. <\/span> (view pdf file (1.1 MB)<\/a>)<\/span><\/p>\n

4.\u00a0\u00a0\u00a0 S. Alla and A.M. Grigoryan, “Method of reconstruction of 3-D PET images from projections,” IEEE Region 5 Technical, Professional, and Student Conference (TPS 2006), <\/i> San Antonio, TX, April 6-8. <\/span> (view pdf file (9.8 MB)<\/a> )<\/span><\/p>\n

5.\u00a0\u00a0\u00a0 F.T. Arslan, A.K. Chan, and A.M. Grigoryan, “Directional denoising of aerial images by splitting-signals,” IEEE Region 5 TPS 2006, <\/i> San Antonio, TX, April 6-8. <\/span> (view pdf file (287 kB)<\/a>)<\/span><\/p>\n

6.\u00a0\u00a0\u00a0 J.U. Anugom and A.M. Grigoryan, “Multiresolution signal processing by Fourier transform time-frequency correlation analysis,” IEEE Region 5 TPS 2006, San Antonio, TX, April 6-8. <\/i> <\/span> (view pdf file (1.2 MB)<\/a>)<\/span><\/p>\n

7.\u00a0\u00a0\u00a0 A.M. Grigoryan and S. Dursun, “Multiresolution of the Fourier transform,” IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005 (ICASSP ’05), <\/i> Philadelphia, PA, March 18-23, 2005. <\/span> (view pdf file (383 kB)<\/a> )<\/span><\/p>\n

8.\u00a0\u00a0\u00a0 F.T. Arslan and A.M. Grigoryan, “Method of image enhancement by splitting-signals,” IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005 (ICASSP ’05), <\/i> March 18-23, 2005. <\/span>(view <\/span>pdf file (629 kB)<\/a> )<\/span><\/p>\n

9.\u00a0\u00a0\u00a0 A.M. Grigoryan … , “Art Code I: A new method of optimal coding,”<\/span> IEEE International Conference on Information Technolgy: Coding and Computing, ITCC-2002, <\/i> Las Vegas, Nevada, USA, April 8-10, 2002, <\/span> (view pdf file (59 kB)<\/a> )<\/span><\/p>\n

10.\u00a0\u00a0\u00a0 A.M. Grigoryan, … , “Art Code II: Lossless Encoding Based on Redistribution of Statistics,”<\/span> IEEE International Conference on Information Technology: Coding and Computing, ITCC-2004, <\/i> Las Vegas, Nevada, USA, April 5-7, 2004. <\/span> (view pdf file (73 kB)<\/a> )<\/span><\/p>\n

Posters<\/span><\/b><\/span><\/p>\n

1.\u00a0\u00a0\u00a0 A.M. Grigoryan and Nan Du, “Method of G-particles for Image Reconstruction from a Finite Number of Projections” SPIE 2013 Conference on Electronic Imaging,<\/i> San Francisco, CA, 2013 <\/span> (view pdf file (1,148MB)<\/a>)<\/span><\/p>\n

2.\u00a0\u00a0\u00a0 Joao Donacien N. Nsingui and A.M. Grigoryan, “Elliptic Discrete Fourier Transform and its Application in Signal and Image Processing,” Thesis presentation in Honors College, ECE Dept., UTSA, May 2012, <\/span> (view pdf file (8.061 MB)<\/a>)<\/span><\/p>\n

3.\u00a0\u00a0\u00a0 A.M. Grigoryan, “Decomposition by Series Direction Images: Image Reconstruction and Enhancement” [7245A-25], International Conference: Electronic Imaging, Science and technology, IS&T\/SPIE 21st Annual Symposium,<\/i> San Diego, CA, 18-22 January, 2009. <\/span> (view pdf file (1.513 MB)<\/a>)<\/span><\/p>\n

4.\u00a0\u00a0\u00a0 A.M. Grigoryan and M.M. Grigoryan, “Discrete unitary transforms generated by moving waves” [6701-78], International Conference: Wavelets XII, SPIE: Optics+Photonics 2007, <\/i> San Diego, CA, 27-29 August, 2007. <\/span> (vie pdf file (198 kB)<\/a>)<\/span><\/p>\n

5.\u00a0\u00a0\u00a0 A.M. Grigoryan and M.M. Grigoryan, “New discrete unitary Haar-type heap transforms” [6701-79], International Conference: Wavelets XII, SPIE: Optics+Photonics 2007, <\/i> San Diego, CA, 27-29 August, 2007. <\/span> (view pdf file (219 kB)<\/a>)<\/span><\/p>\n

6.\u00a0\u00a0\u00a0 R.N. Raghunath, J.M. Moreno, and A.M. Grigoryan “The novel Arc low-pass filter,” IEEE Region 5 Technical, Professional, and Student Conference, TPS 2006, <\/i> San Antonio, TX, April 6-8, 2006. <\/span> (view pdf file (230 kB)<\/a>)<\/span><\/p>\n

Projects <\/span><\/b><\/span><\/em><\/span><\/p>\n

A.\u00a0\u00a0\u00a0 Jason Wyche and James Rakowitz, “8-Point discrete Fourier transform by paired representation,” class EE-5113 VLSI System Design, UTSA, December 2, 2008. <\/span> (view pdf file (1,180 kB)<\/a>. James: Thank you very much for this file. \/Art Grigoryan, February 19, 2009.<\/i><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

\u00a0 New Poster SPIE Defense + Commercial Sensing 2025, Conference 13457: Multimodal Image Exploitation and Learning 2025 1.\u00a0 A.M. Grigoryan, S. White, S.S. Agaian, “A Novel Approach to Image Enhancement Using a 2\u00d72 Processing Model for Color-to-Grayscale Mapping,” 13457-23 (April 15, 2025) (view poster) SLIDES SPIE, Defense + Commercial Sensing, Multimodal Image Exploitation and Learning … <\/p>\n

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