Lane detection plays a crucial role for Advanced Driver Assitance System (ADAS) or autonomous driving applications. Literature shows a lot of lane detection algorithms can work in real time with good results. However,...
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ISBN:
(纸本)9781479983391
Lane detection plays a crucial role for Advanced Driver Assitance System (ADAS) or autonomous driving applications. Literature shows a lot of lane detection algorithms can work in real time with good results. However, they require much computer processing and cannot be embedded in a vehicle ECU without deep software optimizations. In this paper, we discuss the embeddability of lane detection algorithms by comparing state-of-the-art algorithms in terms of functional performance and computational timing. We identify what essential parts of lane detection are time consuming, and show these parts can be computed in real time on embedded systems.
This paper presents a new algorithm for the detection and classification of real-time road traffic signs in the video. Our system is able to detect and classify triangular, circular, and octagonal signs of red and blu...
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ISBN:
(纸本)9781467385275
This paper presents a new algorithm for the detection and classification of real-time road traffic signs in the video. Our system is able to detect and classify triangular, circular, and octagonal signs of red and blue colors. The proposed system operates into two processing steps: (1) detection and (2) classification road signs. The system has detected candidate regions as Maximally Stable Extremal Regions (MSERs) in HSV color space with available robustness to variations in lighting conditions, especially red and blue. The detected candidate regions were then classified as method template matching, such as circular, octagonal, and triangular shapes. The proposed system is operating under a range of weather conditions and recognizes all classes of road traffic sign database. Results show a high success rate. In fact, the system maintains high performance for detection and classification steps whose F-measure are set to 0.95 and 0.92 respectively. We conclude, from these results, that the proposed system is invariant to rotation, translation, scale, even to partial occlusions. Moreover, results prove that the system is suitable and reliable for real-time processing.
The pulse wave signal contains a variety of noises and has strong nonlinear and non-stationary. According to the previous wavelet transformation method, this paper proposes a PPG signal de-noising algorithm based on d...
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The pulse wave signal contains a variety of noises and has strong nonlinear and non-stationary. According to the previous wavelet transformation method, this paper proposes a PPG signal de-noising algorithm based on dual-tree complex wavelet transform (DTCWT) and morphological filtering. With the advantage of simple construction, clear mathematical implications and low computational complexity, this method overcomes the shift sensitive and the frequency aliasing in the discrete wavelet transform. The simulation results show that this algorithm could remove the power line interference and EMG interference, and the quantitative index of SNR and mean square error is superior to the traditional threshold de-noising algorithm. Therefore, the DTCWT and morphological filtering de-noising algorithm would obtain a clear pulse wave signal.
Availability of hardware implementations of super-resolution image reconstruction algorithms is limited mostly by their logical and memory requirements. This is also the case for other imageprocessingalgorithms such...
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ISBN:
(纸本)9781467372282
Availability of hardware implementations of super-resolution image reconstruction algorithms is limited mostly by their logical and memory requirements. This is also the case for other imageprocessingalgorithms such as hyperspectral, image compression, image coding, video coding. In previous publications we have introduced a new execution flow that tackles the problem of high memory requirements of a restoration-interpolation super-resolution kernel by carrying out processing in a macroblock-by-macroblock manner. In this work we present the modelling framework used for the evaluation of the proposed execution flow. The modelling process is presented in a step-by-step manner by means of a real-life example of implementation of super-resolution image reconstruction with description of the choices made at every stage and explanation of the reasoning behind. In the presented case the use of the proposed frame-work led to a hardware implementation with real-time capabilities. This frame-work can be applied to similar algorithms, helping system designers in achieving better work organization and efficiency.
This paper presents an approach for the surface inspection of wire-type objects. The research aims to detect scratch defect of a wire rod. Scratch defect is caused by many reasons such as poor quality of raw material ...
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ISBN:
(纸本)9781509025367
This paper presents an approach for the surface inspection of wire-type objects. The research aims to detect scratch defect of a wire rod. Scratch defect is caused by many reasons such as poor quality of raw material or malfunction of rolling process. The defects are very difficult to detect accurately due to the scale-covered background and uneven illumination. The inspection system is based on vision technology. imageprocessingalgorithms are applied for detecting scratch defects of wire rod. The detection algorithm is mainly divided into three steps. First, use wavelet transform to have texture analysis. In order to obtain more details, we take the approximation subimage at resolution level one as source image. Then, explain the Fast Line Segment Detector method and the detected results are illustrated using real defects from steel wire rods. But the complex backgrounds in images of wire rods inevitably result in false positive and false negative defects. Finally, apply postprocessing based on detection results. Compared with the classical methods, the results show that the applied algorithms have a good performance on scratch defect detection of wire rod. Moreover, it has an effective execution time proportional to the number of pixels in the image.
Glaucoma is an asymptomatic eye disease and one of the major causes of irreversible blindness worldwide. For this reason, there have been significant advances in automatic screening tools for early detection. In this ...
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ISBN:
(纸本)9781509018918
Glaucoma is an asymptomatic eye disease and one of the major causes of irreversible blindness worldwide. For this reason, there have been significant advances in automatic screening tools for early detection. In this paper, an automatic glaucoma diagnosis algorithm based on retinal fundus image is presented. This algorithm uses anatomical characteristics such as the position of the vessels and the cup within the optic nerve. Using several color spaces and the Stochastic Watershed transformation, different characteristics of the optic nerve were analyzed in order to distinguish between a normal and a glaucomatous fundus. The proposed algorithm was evaluated on 53 images (24 normal and 29 glaucomatous images). The specificity and sensitivity obtained by the proposed algorithm are 0.81 and 0.87 using Luv color space, which means considerable performance in diagnosis systems.
A fully-automatic ultrasound imageprocessing system that can determine the needle entry site for epidural anesthesia (EA) in real time is presented in this paper. Neither the knowledge of anesthetists nor additional ...
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ISBN:
(纸本)9781457702198
A fully-automatic ultrasound imageprocessing system that can determine the needle entry site for epidural anesthesia (EA) in real time is presented in this paper. Neither the knowledge of anesthetists nor additional hardware is required to operate the system, which firstly directs the anesthetists to reach the desired insertion region in the longitudinal view, i.e., lumbar level L3-L4, and then locates the ideal puncture site by instructing the anesthetists to rotate and slightly adjust the position of ultrasound probe. In order to implement these functions, modules including imageprocessing, panorama stitching, feature extraction/selection, template matching and support vector machine (SVM) classification are incorporated in this system. Additionally, a user-friendly graphical user interface (GUI), which displays the processing results and guides anesthetists intuitively, is further designed to conceal the intricacy of algorithms. Feasibility and effectiveness of the proposed system has been evaluated through a set of realtime tests on 53 volunteers from a local hospital.
image classification is one of the most multifaceted disciplines in imageprocessing. There are quite a few approaches to categorize images and they offer good classification outcome but they not be up to snuff to pro...
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image classification is one of the most multifaceted disciplines in imageprocessing. There are quite a few approaches to categorize images and they offer good classification outcome but they not be up to snuff to provide acceptable classification upshots when the image comprises blurry content. The two chief techniques for image classification are supervised and unsupervised classification. Mutually each possess its own pros and cons. The foremost intent of literature survey is to present a concise outline about some of most widespread image classification schemes and comparison between them. At this point in a survey on diverse classification practices for images and moreover its application for diagnosis of scores of diseases is provided. A few of the unsurpassed processes for classification comprise Artificial Neural Network, Support Vector Machine, and Decision Tree. Their characteristics, upshots and certain vital issues have been judged against each other in order to ascertain the effectual algorithm. To conclude it has been shown that the proposed system Hybrid RGSA and Support Vector Machine Framework is the paramount one to classify images competently.
The quality of the image being captured in the current mobile devices is made acceptable using the combination of imageprocessingalgorithms. While processing these algorithms, it utilizes lots of memory space. In or...
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ISBN:
(纸本)9781479968183
The quality of the image being captured in the current mobile devices is made acceptable using the combination of imageprocessingalgorithms. While processing these algorithms, it utilizes lots of memory space. In order to reduce the memory, we are moving to software pipeline, which operates at low cost and also maximizes the flexibility than the traditional hardware pipeline. In our approach, we are using line based buffer software pipeline, which operates at low cost and enhance the quality of the image. The implemented algorithm will work individually and the results alone will feed into the next process. This reduces the processing time significantly in each step. The quality of the image is enhanced using image enhancement algorithms and noise reduction algorithm. The implemented framework reduces memory consumption and also enhances the performance.
In this brief, the implementation of efficient image encryption and decryption scheme in Residue Number System (RNS) is analyzed. The RNS domain is mainly chosen for its carry free parallel and fast arithmetic operati...
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ISBN:
(纸本)9781509010677
In this brief, the implementation of efficient image encryption and decryption scheme in Residue Number System (RNS) is analyzed. The RNS domain is mainly chosen for its carry free parallel and fast arithmetic operations. But, the converters make RNS inefficient by having large delays. Hence, to use the RNS for our applications we must have the efficient converters. Here, we designed pure combinational logic based forward and reverse converters without using any preloaded ROM's. We used most efficient moduli set {2 n ,2 2n+1 -1,2 n +1,2 n -1} for realizing these converters. New Chinese Reminder theorem-II is used for the implementation of reverse converter. The image is encrypted by doing modular conversion using forward converted and the original image is decrypted using reverse converter.
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