In the early years of college, students have the need to learn how to program in any programming language. It is important to see the differences between programming languages and their rules. We are proposing an inte...
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ISBN:
(纸本)9781509023349
In the early years of college, students have the need to learn how to program in any programming language. It is important to see the differences between programming languages and their rules. We are proposing an interactive and self-study system for students to acquire the knowledge they need, from data structures to algorithms using multiple programming languages. The system gives the students some exercises that outputs an image. The student's image will be compared with the correct image that is in the system and the system judges the student's image will is correct or not. The students will program the exercises in the selected programming languages. Eventually the system will help students learn multiple programming languages, especially, how to solve problems regardless of programming language.
Increasing spatial resolution is often required in many applications such as entertainment systems or video surveillance. Apart from using higher resolution sensors, it is also possible to apply super-resolution algor...
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ISBN:
(纸本)9781467399623
Increasing spatial resolution is often required in many applications such as entertainment systems or video surveillance. Apart from using higher resolution sensors, it is also possible to apply super-resolution algorithms to realize an increased resolution. Those methods can be divided into approaches that rely on only a single low resolution image or on multiple low resolution video frames. While incorporating more frames into the super-resolution is beneficial for the resolution enhancement in principle, it is also likely to introduce more artifacts from inaccurate motion estimation. To alleviate this problem, various weightings have been proposed in the literature. In this paper, we propose an extended dual weighting scheme for an interpolation-based super-resolution method based on Voronoi tessellation that relies on both a motion confidence weight and a distance weight. Compared to non-weighted super-resolution, the proposed method yields an average gain in luminance PSNR of up to 1.29 dB and 0.61 dB for upscaling factors of 2 and 4, respectively. Visual comparisons substantiate the objective results.
In this research, a matrix notation method to extract discrete orthogonal Racah moments is proposed to reduce the computation time. To verify this new computational method, the image reconstructions from higher orders...
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ISBN:
(纸本)9781467387224
In this research, a matrix notation method to extract discrete orthogonal Racah moments is proposed to reduce the computation time. To verify this new computational method, the image reconstructions from higher orders of Racah moments are performed. Our experimental results show that the Racah moments computing time has been reduced tremendously, while the testing image can be reconstructed completely by Racah moments of orders up to 510 without any error.
Diabetic retinopathy (DR) is the most frequent complication of diabetes mellitus that affects vision to the point of causing blindness. In advanced stages its progress can be delayed with laser photocoagulation which ...
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ISBN:
(纸本)9781509018918
Diabetic retinopathy (DR) is the most frequent complication of diabetes mellitus that affects vision to the point of causing blindness. In advanced stages its progress can be delayed with laser photocoagulation which leaves behind marks on the retina. Modern screening programs rely on automatic diagnostic algorithms to detect signs of DR in patients. These systems performance may be impaired when patient retina presents marks from previous laser photocoagulation treatments. Since these patients are already being treated, it is desirable to detect and remove them from the screening program. An algorithm that automatically detects the presence of laser marks in retinal images using tree-based classifiers is proposed and the results on its performance are obtained and described. Two new public accessible datasets containing retinal images with laser marks are provided in this paper.
This work presents a Tone Mapping Operator (TMO) which adjusts the High Dynamic Range (HDR) of image sensor data to the limited dynamic range of conventional displays with analog signal processing. It is based on Phot...
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ISBN:
(纸本)9781509004942
This work presents a Tone Mapping Operator (TMO) which adjusts the High Dynamic Range (HDR) of image sensor data to the limited dynamic range of conventional displays with analog signal processing. It is based on Photographic Tone Reproduction (PTR) and suitable for analog circuit design in a CMOS image sensor in order to reduce the hardware cost and operation time for real-time imageprocessing. For this reason, the characteristic advantage and calculation limitation of analog technology are considered in the TMO algorithm proposal. Furthermore, the appropriate modelling is built and simulated in Verilog-A. The function of the algorithm is feasible for analog processing. The frequency of the analog TMO is upper 52MHz while it consumes 55mW. The simulation results of test images are compared with the digital global TMO and the proposed analog TMO provides a reasonable similar dynamic range compression.
Automatic snore detection system based on ARM processor has been designed in our work that only uses single microphone recording snore sound. It can assist a noninvasive and portable diagnosis for sleep apnea-hypopnea...
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ISBN:
(纸本)9781509006557
Automatic snore detection system based on ARM processor has been designed in our work that only uses single microphone recording snore sound. It can assist a noninvasive and portable diagnosis for sleep apnea-hypopnea syndrome (SAHS) based on digital signal processing. The 32-bit microcontroller STM32F407 is selected as main hardware of embedded system. To make full use of the ARM resources, SAHS snore diagnosis task is decomposed into several steps with different priority. Real-time screening of snore is implemented based on recording of nocturnal snore sound. Meanwhile the SAHS snore and simple snore are discriminated by the Earth mover's distance (EMD) algorithm which is online completed. Therefore, apnea-hypopnea index (AHI: the average number of apneic events per hour of sleep) is calculated and screening result is obtained.
Face detection and tracking is one of the emerging research areas in the image analysis and computer vision systems. This face detection and tracking helps local security forces to investigate crime incidents. This pa...
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ISBN:
(纸本)9781509010486
Face detection and tracking is one of the emerging research areas in the image analysis and computer vision systems. This face detection and tracking helps local security forces to investigate crime incidents. This paper describes a face tracking framework that is capable of tracking a face in real time rapidly frame by frame. Camshift algorithm and KLT algorithm implemented and a comparison study between these two algorithms has been described in this paper. A real time video is experimented using these two algorithms for face detection and tracking. The experimental results show that the KLT algorithm performance is better than the Camshift algorithm in detecting the face and tracking the face. In this article it has been shown how the KLT algorithm proved to be better tracking algorithm than Camshift algorithm.
Peak search for three-dimensional rotation electron diffraction image is almost the most important step in crystal structure determination. The difference of Gaussian method is the traditional approach for this task w...
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ISBN:
(纸本)9781509055227
Peak search for three-dimensional rotation electron diffraction image is almost the most important step in crystal structure determination. The difference of Gaussian method is the traditional approach for this task with the disadvantage that values of three tunable parameters need to be determined by users. To address this drawback, this paper presents a local gradient based peak search algorithm that needs only one tunable parameter. Experiments show that our proposed method is as effective as the difference of Gaussian method in peak detection task, but has obvious advantages in speed and convenience.
En route to an intraoperative imaging system for brain surgery, a thermographic camera associated with time-resolved data analysis is used for the identification of functional areas and the detection of brain tumours....
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ISBN:
(纸本)9781509029600
En route to an intraoperative imaging system for brain surgery, a thermographic camera associated with time-resolved data analysis is used for the identification of functional areas and the detection of brain tumours. In this contribution we propose a Cellular Nonlinear Network based imageprocessing system supporting massively-parallel and real-time processing of thermographic video data. In the current setup the system is implemented on a Xilinx Zynq FPGA and is used for the preprocessing of the raw data. The development and implementation of a digital low-pass filter for the compensation of local motion artefacts will be demonstrated as a typical application example of the freely programmable system.
As a kind of widely used form of two-dimension codes, the QR codes have been widely applied in various aspects of our life, but in the process of the use of the QR codes, the QR code images captured often suffer from ...
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ISBN:
(纸本)9781467388399
As a kind of widely used form of two-dimension codes, the QR codes have been widely applied in various aspects of our life, but in the process of the use of the QR codes, the QR code images captured often suffer from deformity because the QR code label is attached onto the object irregular surface (for example, a curve surface) or the camera and the QR code label are different in position, therefore, the QR code image recognition correction method based on the shape function has been put forward and verified, with the experimental results showing that the improved algorithm can restore the graphic effect.
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