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visual communications and image processing ii 1987

The proceedings contain 65 papers. The topics discussed include: a 13.5 Mhz single chip multiformat discrete cosine transform;a 16x16 discrete cosine transform chip;block list transform (BLT) coding of images;applications of vector quantization to progressive compression and transmission of images;efficient transmission of ‘most important’ successive image approximations;orthogonal pyramid transforms for image coding;image coding for Chinese character patterns;pattern recognition with a spiral sampling technique;improved edge-based image segmentation;parallel fitting of quadric patches for structural analysis of range imagery;feature extraction from intensity images;and experiments on image coding with distortion below visual threshold.

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Digital image processing and visual communications Technologies in the Earth and Atmospheric Sciences ii

Digital Image Processing and Visual Communications Technolog...

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Digital image processing and visual communications Technologies in the Earth and Atmospheric Sciences ii

ISBN: (纸本)0819410209

This conference proceedings contains 23 papers. The topics discussed are earth imagery, remote sensing, geographical information systems, multispectral imagery, map databases, image databases, image storage and retrieval, visualization, environmental monitoring, forest monitoring, ocean monitoring, image processing, image analysis, neural network applications, feature extraction, computer vision, vision algorithms, and learning algorithms.

关键词： Remote sensing

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image Generation from Arabic Text: Comparative Study of Proposed Architectures 8th

Image Generation from Arabic Text: Comparative Study of Prop...

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8th International Conference on Arabic Language processing

作者： Bahani, Mourad El Ouaazizi, Aziza Maalmi, Khalil Essahlaoui, Abdelouahed Sidi Mohamed Ben Abdellah Univ Natl Sch Appl Sci Artificial Intelligence Data Sci & Emerging Syst Fes Morocco Sidi Mohamed Ben Abdellah Univ Lab Engn Sci FPT Taza Morocco

ISBN: (纸本)9783031804373;9783031804380

Text-to-image generation is a cutting-edge technology that enables computers to generate images from textual descriptions. While this technology has been extensively researched and applied to English language text, applying it to Arabic language text is still in its early stages. Additionally, the Arabic language is challenging due to its right-to-left writing system and extensive vocabulary of 1.3 million words. In this paper, we explore text-to-image generation for generating images from Arabic language text descriptions. Firstly, we fine-tune a transformer-based model pre-trained on the Arabic text to transform the text information into affine transformation within the DF-GAN generator. Secondly, we present a text transformer that combines LSTM layers to address the limitation of unrecognized words. Thirdly, a mask predictor is trained into the generator using a weakly supervised method and incorporated into the affine transformation for a more effective integration of image and text features. In addition, we add the DAMSM loss function as a regularization to the loss function to achieve convergences and stability in the training phase. The experiment on two challenging datasets CUB and Oxford-flower shows that our architectures can accurately generate high-quality images faithfully representing the Arabic textual descriptions. We believe the scaling of this task could have critical applications in fields such as Arabic visual learning, e-commerce, advertising, and entertainment.

关键词： Machine Learning Deep Learning Computer Vision Generative Adversarial Networks Text-to-image Generation Arabic Text processing

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Accelerating Traditional Object Detection Methods on Sophisticated Embedded Systems 4th

Accelerating Traditional Object Detection Methods on Sophist...

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4th International Conference on Intelligent Systems and Pattern Recognition-ISPR

作者： Sehairi, Kamal Bouhafs, Abdelkader Boucherit, Ibtissam Mama Bouwmans, Thierry Chouireb, Fatima Ecole Normale Super Laghouat Dept Phys Lab Appl Sci & Didact Laghouat Algeria Univ Amar Telidji Laghouat Dept Elect Telecommun Signals & Syst Lab Laghouat Algeria Univ La Rochelle Dept Comp Sci Lab Math Image & Applicat La Rochelle France

ISBN: (纸本)9783031821523;9783031821530

Identifying and locating objects in images and videos, including elements like traffic signs, vehicles, buildings, and people, constitutes a fundamental and demanding task in computer vision, known as object detection. Due to the higher computing complexity of this technique and the large amount of data carried by the video signal, it is nearly impossible for ordinary general-purpose processors GPPs or CPUs to run these techniques in real-time, especially for embedded systems applications. Therefore, special hardware that can acquire, control, or execute in parallel is required. These specialized hardware systems include Digital Signal Processors DSPs, Field Programmable Gate Arrays FPGAs, visual processing Units VPUs, Tensor processing Units TPUs, Neural processing Units NPUs or Graphics processing Units GPUs. This work presents the benefits of accelerating traditional object detection methods on a high-end embedded system, the Jetson Nano Developer Kit. This single computer board is equipped with the Tegra K1 System on Chip SoC, which is composed of a quad-core ARM A15 and 192 cores of Kepler-embedded GPU. Computing acceleration was ensured via the use of the CUDA OpenCV library for both the Histogram of Oriented Gradients HOG and the Haar Cascade Classifier. For VGA resolution, results reveal that the GPU implementation on this embedded system is 1.4x faster than the CPU for the HOG method and 2x for the Haar Cascade Classifier method.

关键词： Object detection Machine Learning Haar Cascade HOG Local feature descriptors GPU implementation OpenCV CUDA SoC Tegra X1 Jetson Nano

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Block list transform (BLT) coding of images

Block list transform (BLT) coding of images

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visual communications and image processing ii 1987

作者： Haskell, Barry G. AT and T Bell Laboratories HolmdelNJ07733 United States

关键词： image coding

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SPECTRAL CORRELATION OF MODULATED SIGNALS .2. DIGITAL MODULATION

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IEEE TRANSACTIONS ON communications 1987年第6期35卷 595-601页

作者： GARDNER, WA BROWN, WA CHEN, CK Signal and Image Processing Laboratory Department of Electrical and Computer Engineering University of California Davis CA USA

As a continuation of Part I, the spectral correlation function is presented for a variety of types of digitally modulated signals. These include digital pulse-amplitude, pulse-width, and pulse-position modulation, and various types of phase-shift keying and frequency-shift keying. The magnitudes of the spectral correlation functions are graphed as the heights of surfaces above a bifrequency plane, and these graphs are used as visual aids for comparison and contrast of the spectral correlation properties of different modulation types.

关键词： Digital modulation Space vector pulse width modulation Signal processing Pulse modulation Phase shift keying Frequency shift keying Pulse width modulation Filters Matrices Parameter estimation

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Digital image processing at the level of data acquisition

Digital image processing at the level of data acquisition

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visual communications and image processing ii 1987

作者： Hilsenrath, O.A. Zeevi, Y.Y. E.E. Department - Computer Vision Laboratory Technion - Israel Institute of Technology Haifa32000 Israel

The Random Scan Computer Vision System acquires two-dimensional data along task-dependent scanning patterns matched to image structure. A scanning trajectory is generated based on a-priori information concerning image structure, and is modified in real-time by the central processor in an interactive mode. The utility of various deterministic and probabilistic strategies is discussed, with special emphasis on the hierarchical nature of the process. © 1987 SPIE. All rights reserved.

关键词： Data acquisition

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image algebra - Induced operators and induced subalgebras 2

Image algebra - Induced operators and induced subalgebras

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visual communications and image processing ii 1987

作者： Dougherty, Edward R. Giardina, Charles R. Fairleigh Dickinson University Singer-Kearfott Company Teaneck New Jersey WayneNJ United States

The primary goal of an image algebra is the development of a mathematical environment in which to express the various algorithms employed in image processing. From a practical standpoint, this means that the algorithms should appear as strings in an operational calculus, where each operator can ultimately be expressed as a string composed of some collection of elemental, or "basis," operators and where the action of the string upon a collection of input images is determined by function composition. For instance, rather than defining operations such as convolution and dilation in a pointwise manner, we desire closed-form expressions of these operators in terms of low-level operations that are close to the algebraic structure of the underlying mathematical entities upon which images are modeled. It is precisely such an approach that will yield a natural symbolic language for the expression of image processing algorithms.

关键词： image processing Space operations Algorithm development Binary data visual communications Calculus Digital imaging Convolution Digital image processing Mathematical modeling

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Application of image processing equipment with multiprocessors to line-drawing recognition

Application of image processing equipment with multiprocesso...

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visual communications and image processing ii 1987

作者： Ogawa, Hiroshi Kawada, Etsuo Ueda, Naonori NTT Laboratories Nippon Telegraph and Telephone Corporation/Take 1-2356 Yokosuka Kanagawa238-03 Japan

This paper describes image processing equipment developed for a data entry system aimed at creating a plant-record database. The equipment employs a mu1ti-processor architecture allowing parallel processing of very large drawings by dividing them into sub-images. image enhancement and binarization processing is executed on the equipment to improve the image quality of handwritten plant-record drawings. The recognition processing of symbols and line segments in the drawing is also implemented. The equipment is operated as a part of an experimental data entry system for Al-size handwritten plant-record drawings. It is confirmed that blur and faintness are eliminated in about 25 seconds, and the target symbols and line segments are recognized in about 15 minutes with an accuracy of over 90%. © 1987 SPIE. All rights reserved.

关键词： image enhancement

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Chinese multifont recognition system

Chinese multifont recognition system

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visual communications and image processing ii 1987

作者： Jeng, Bor-Shenn Chang, Gan-How Wu, Chun-Chu Liu, Tsann-Shyong Chang, Kuang-Yao Lin, Jang-Keng Yang, Chih-Yen Hsieh, Eric Wu, Yung-Lai Telecommunication Laboratories Ministry Of Communications P. O. Box 71 Chung-Li Taiwan

Since the input problem of Chinese character is the barrier of the integration of computer, Chinese and communication { C & C & C), we studied and developed a powerful Chinese multifont recognition system. In this system, the algorithm we developed can recognize at the same time in the same program different character styles. In the meantime, it can recognize characters of different sizes. © 1987 SPIE. All rights reserved.

关键词： image processing

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