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Pages
- Title
- A novel technique for the retrieval of compressed image and video databases.
- Creator
- Saksobhavivat, Pornvit., Florida Atlantic University, Furht, Borko, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
- Abstract/Description
-
The classic methods in indexing image and video databases are either using keywords or analysis of color distribution. In the recent year, there is a new standard in image and video compression standard called JPEG and MPEG respectively. One of the basic operations of JPEG and MPEG is Discrete Cosine Transform (DCT). The human visual system is known to be very dependent on spatial frequency. The DCT has capability to provide a good approximation of the images' spatial frequency that is...
Show moreThe classic methods in indexing image and video databases are either using keywords or analysis of color distribution. In the recent year, there is a new standard in image and video compression standard called JPEG and MPEG respectively. One of the basic operations of JPEG and MPEG is Discrete Cosine Transform (DCT). The human visual system is known to be very dependent on spatial frequency. The DCT has capability to provide a good approximation of the images' spatial frequency that is sensitive to human eyes. We take this advantage of DCT in indexing image and video databases. However, the two-dimensional DCT can give us 64 coefficients per block of 8 x 8 pixels. These numbers are too many to calculate to receive fast indexing results. We use only first coefficient of DCT called DC coefficient to represent an 8 x 8 block of transformed data. This representation yields satisfactory indexing results.
Show less - Date Issued
- 1997
- PURL
- http://purl.flvc.org/fcla/dt/15442
- Subject Headings
- Video compression, Image compression, Indexing
- Format
- Document (PDF)
- Title
- On the parallel computation of image compression transformations.
- Creator
- Caimi, F. M., Schmalz, Mark S., Ritter, G. X., Harbor Branch Oceanographic Institute
- Date Issued
- 1998
- PURL
- http://purl.flvc.org/FCLA/DT/3180419
- Subject Headings
- Image compression, Parallel computers
- Format
- Document (PDF)
- Title
- Image quality measures for performance assessment of compression transforms.
- Creator
- Caimi, F. M., Schmalz, Mark S., Ritter, G. X., Harbor Branch Oceanographic Institute
- Date Issued
- 1998
- PURL
- http://purl.flvc.org/FCLA/DT/3180421
- Subject Headings
- Image compression, Image Quality
- Format
- Document (PDF)
- Title
- Performance analysis of compression algorithms for noisy multispectral underwater images of small targets.
- Creator
- Schmalz, Mark S., Ritter, G. X., Caimi, F. M., Harbor Branch Oceanographic Institute
- Date Issued
- 1997
- PURL
- http://purl.flvc.org/FCLA/DT/3180413
- Subject Headings
- Image compression, Underwater vision
- Format
- Document (PDF)
- Title
- DSP hardware implementation of transform-based compression algorithm for AUV telemetry.
- Creator
- Kocak, D. M., Caimi, F. M., Harbor Branch Oceanographic Institute
- Date Issued
- 1998
- PURL
- http://purl.flvc.org/FCLA/DT/3183703
- Subject Headings
- Image compression, Submersibles--Automatic control, Telemetry, Data Compression
- Format
- Document (PDF)
- Title
- An approach to image compression using three-dimensional DCT.
- Creator
- Furht, Borko, Li, Xiuqi
- Date Issued
- 2003-09-24 - 2003-09-26
- PURL
- http://purl.flvc.org/fcla/dt/358419
- Subject Headings
- Image compression., Video compression., Three-dimensional display systems.
- Format
- Document (PDF)
- Title
- Performance evaluation of data compression transforms for underwater imaging and object recognition.
- Creator
- Schmalz, Mark S., Ritter, G. X., Caimi, F. M., Harbor Branch Oceanographic Institute
- Date Issued
- 1997
- PURL
- http://purl.flvc.org/FCLA/DT/3183701
- Subject Headings
- Underwater imaging systems, Image compression
- Format
- Document (PDF)
- Title
- Data compression techniques for underwater imagery.
- Creator
- Schmalz, Mark S., Ritter, G. X., Caimi, F. M., Harbor Branch Oceanographic Institute
- Date Issued
- 1996
- PURL
- http://purl.flvc.org/fau/fd/FA00007349
- Subject Headings
- Underwater imaging systems, Data Compression
- Format
- Document (PDF)
- Title
- Comparison and development of compression algorithms for AUV telemetry: Recent advancements.
- Creator
- Caimi, F. M., Kocak, D. M., Ritter, G. X., Schmalz, Mark S., Harbor Branch Oceanographic Institute
- Date Issued
- 1998
- PURL
- http://purl.flvc.org/FCLA/DT/3338524
- Subject Headings
- Algorithms, Telemetry, Image Quality, Image compression
- Format
- Document (PDF)
- Title
- A patent application for the invention of a method and apparatus for multi-view video coding.
- Creator
- Furht, Borko, Kalva, Hari
- Date Issued
- 2005-09-15
- PURL
- http://purl.flvc.org/fcla/dt/363494
- Subject Headings
- Digital video., Technology --Patents., Video compression.
- Format
- Document (PDF)
- Title
- Interactive system for visualization and retrieval of video data.
- Creator
- Furht, Borko
- Date Issued
- 2005-09-15
- PURL
- http://purl.flvc.org/fcla/dt/366423
- Subject Headings
- Digital video., Video compression., Technology --Patents.
- Format
- Document (PDF)
- Title
- Background of the invention: an interactive system for visualization and retrieval of video data.
- Creator
- Furht, Borko
- Date Issued
- 2005
- PURL
- http://purl.flvc.org/fcla/dt/366425
- Subject Headings
- Technology --Patents., Video compression., Digital video.
- Format
- Document (PDF)
- Title
- EFFECTS OF SALTWATER INTRUSION ON THE COMPRESSIBILITY BEHAVIOR OF THE EVERGLADES SOILS.
- Creator
- Ribeiro, Camila, Sobhan, Khaled, Florida Atlantic University, Department of Civil, Environmental and Geomatics Engineering, College of Engineering and Computer Science
- Abstract/Description
-
The Florida Everglades is considered as a vulnerable wetland composed primary of organic rich peat soils, experiencing saltwater intrusion. Impact of increasing salinity on the strength and deformation properties of peat is unknown. A laboratory study was undertaken to evaluate how the growing salinity level due to sea level rise may alter the compressibility behavior of the Everglades soils. Sixteen 1-dimensional oedometer tests were conducted on undisturbed Everglades peat soils in two...
Show moreThe Florida Everglades is considered as a vulnerable wetland composed primary of organic rich peat soils, experiencing saltwater intrusion. Impact of increasing salinity on the strength and deformation properties of peat is unknown. A laboratory study was undertaken to evaluate how the growing salinity level due to sea level rise may alter the compressibility behavior of the Everglades soils. Sixteen 1-dimensional oedometer tests were conducted on undisturbed Everglades peat soils in two phases. Phase I included samples from Site 1 (saltwater) and Site 3 (freshwater) without any salinity addition. Phase II consisted of soil from Site 3 (freshwater) saturated in six different levels of salinity artificially added to the samples. Compressibility properties investigated in this study include compression index (Cc), coefficient of consolidation (Cv), hydraulic conductivity (K), and the Ca/Cc ratio. In general, it was observed that the increase in salinity beyond a threshold value tends to increase the soil compressibility properties, indicating a possible reduction in soil stability with saltwater intrusion.
Show less - Date Issued
- 2021
- PURL
- http://purl.flvc.org/fau/fd/FA00013783
- Subject Headings
- Everglades (Fla.), Peat soils, Saltwater encroachment, Compressibility
- Format
- Document (PDF)
- Title
- Limits on computational precision of image compression transformations.
- Creator
- Schmalz, Mark S., Ritter, G. X., Caimi, F. M., Harbor Branch Oceanographic Institute
- Date Issued
- 1998
- PURL
- http://purl.flvc.org/FCLA/DT/3180417
- Subject Headings
- Image compression, Adaptive computing, Adaptive computation and machine learning
- Format
- Document (PDF)
- Title
- Mathematical methods for mapping image and data compression transforms to adaptive computing systems.
- Creator
- Schmalz, Mark S., Witter, G. S., Caimi, F. M., Harbor Branch Oceanographic Institute
- Date Issued
- 1998
- PURL
- http://purl.flvc.org/FCLA/DT/3183705
- Subject Headings
- Image compression, Adaptive computing systems, Underwater acoustic telemetry
- Format
- Document (PDF)
- Title
- A review of recent underwater imaging methods and advancements.
- Creator
- Caimi, F. M., Harbor Branch Oceanographic Institute
- Date Issued
- 1996
- PURL
- http://purl.flvc.org/FCLA/DT/3351972
- Subject Headings
- Underwater imaging systems, Photogrammetry, Image compression, Image processing, Review
- Format
- Document (PDF)
- Title
- Underwater laser serial imaging using compressive sensing and digital mirror device.
- Creator
- Ouyang, Bing, Dalgleish, Fraser R., Caimi, F. M., Giddings, T. E., Shirron, J. J., Vuorenkoski, Anni K., Nootz, G., Britton, W. B., Ramos, Brian
- Date Issued
- 2011
- PURL
- http://purl.flvc.org/FCLA/DT/3340793
- Subject Headings
- Underwater imaging systems, Image compression, Lasers, Signal processing
- Format
- Document (PDF)
- Title
- Application of wavelets to image and video coding.
- Creator
- Zolghadr, Esfandiar, Florida Atlantic University, Furht, Borko, College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
- Abstract/Description
-
In this thesis we applied wavelet transforms to image and video coding. First, a survey of various wavelets and their features is presented, including continuous, discrete, and orthogonal wavelets. Theories and concepts underlying one and two-dimensional wavelet transforms are introduced and compared to Fourier transform and sub-band coding. The core of the thesis is the implementation of two-dimensional and three-dimensional codec architectures and their application to coding images and...
Show moreIn this thesis we applied wavelet transforms to image and video coding. First, a survey of various wavelets and their features is presented, including continuous, discrete, and orthogonal wavelets. Theories and concepts underlying one and two-dimensional wavelet transforms are introduced and compared to Fourier transform and sub-band coding. The core of the thesis is the implementation of two-dimensional and three-dimensional codec architectures and their application to coding images and videos, respectively. We studied performance of the wavelet codec by comparing it to DCT and JPEG coding techniques. We applied these techniques for compression of a variety of test images and videos. We also analyzed the adaptability and scalability of 2D and 3D codec. Experimental results, presented in the thesis, illustrate the superior performance of wavelets compared to other coding techniques.
Show less - Date Issued
- 2003
- PURL
- http://purl.flvc.org/fcla/dt/13050
- Subject Headings
- Wavelets (Mathematics), Image compression, JPEG (Image coding standard)
- Format
- Document (PDF)
- Title
- Densely-centered uniform P-search: A fast motion estimation algorithm.
- Creator
- Greenberg, Joshua H., Florida Atlantic University, Furht, Borko
- Abstract/Description
-
Video compression technology promises to be the key to the transmission of motion video. A number of techniques have been introduced in the past few years, particularly that developed by the Motion Picture Experts Group (MPEG). The MPEG algorithm uses Motion Estimation to reduce the amount of data that is stored for each frame. Motion Estimation uses a reference frame as a codebook for a modified Vector Quantization process. While an exhaustive search for Motion Estimation Vectors is time...
Show moreVideo compression technology promises to be the key to the transmission of motion video. A number of techniques have been introduced in the past few years, particularly that developed by the Motion Picture Experts Group (MPEG). The MPEG algorithm uses Motion Estimation to reduce the amount of data that is stored for each frame. Motion Estimation uses a reference frame as a codebook for a modified Vector Quantization process. While an exhaustive search for Motion Estimation Vectors is time-consuming, various fast search algorithms have been developed. These techniques are surveyed, and the theoretical framework for a new search algorithm is developed: Densely-Centered Uniform P-Search. The time complexity of Densely-Centered Uniform P-Search is comparable to other popular Motion Estimation techniques, and shows superior results on a variety of motion video sources.
Show less - Date Issued
- 1996
- PURL
- http://purl.flvc.org/fcla/dt/15286
- Subject Headings
- Image processing--Digital techniques, Data compression (Telecommunication)
- Format
- Document (PDF)
- Title
- Enhancing video quality based on psychophysical studies of smooth pursuit eye movements.
- Creator
- Chilamakuri, Pavani., Florida Atlantic University, Furht, Borko, Glenn, William E., College of Engineering and Computer Science, Department of Computer and Electrical Engineering and Computer Science
- Abstract/Description
-
When motion occurs in a scene, the quality of video degrades due to motion smear, which results in a loss of contrast in the image. The characteristics of the human vision system when smooth pursuit eye movements occur are different from those when the eye fixates on an object such as a video screen during motion. Smooth pursuit eye movements dominate in the presence of dynamic stimuli. In the presence of smooth pursuit eye movements, the contrast sensitivity for increasing target velocities...
Show moreWhen motion occurs in a scene, the quality of video degrades due to motion smear, which results in a loss of contrast in the image. The characteristics of the human vision system when smooth pursuit eye movements occur are different from those when the eye fixates on an object such as a video screen during motion. Smooth pursuit eye movements dominate in the presence of dynamic stimuli. In the presence of smooth pursuit eye movements, the contrast sensitivity for increasing target velocities shifts toward lower spatial frequencies. The sensitivity for low spatial frequencies during motion is higher than for a stationary case. This dissertation will propose a method to improve the perceptual quality of video using temporal enhancement prefiltering technique based on the characteristics of Smooth Pursuit Eye Movements (SPEM). The resulting technique closely matches the characteristics of the human visual system (HVS). When motion occurs, the eye tracks the moving targets in a scene as opposed to fixating on any portion of the scene. Hence, psychophysical studies of smooth pursuit eye movements were used as a basis to design the temporal filters. Results of experiments show that temporal enhancement results in improved quality by increasing the apparent sharpness of the image sequence. In this dissertation, a study of research describing how motion affects the image quality at the camera lens and the human eye is presented. This dissertation uses that research to develop a temporal enhancement technique to improve the quality of video degraded by motion.
Show less - Date Issued
- 2003
- PURL
- http://purl.flvc.org/fau/fd/FADT12035
- Subject Headings
- Eye--Movements, Digital video, Visual perception, Video compression
- Format
- Document (PDF)