The foggy image recovery is one of hot topics in the imageprocessing. Considering that the haze images fade the colors and reduce the contrast in the process of defogging, in this paper, we propose a novel regulariza...
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ISBN:
(纸本)9781538649916
The foggy image recovery is one of hot topics in the imageprocessing. Considering that the haze images fade the colors and reduce the contrast in the process of defogging, in this paper, we propose a novel regularization method of image defogging based on Hardy space transformation. Our method uses model analysis and mathematical derivation to use the transformed pseudo-differential operator, which obtains more statistical features and defines the extent of image defogging The effective comparison algorithm is preferred. Extensive quantitative and qualitative evaluations have been demonstrated that our algorithm improves effectively the defogging of real and simulated images.
Crankshaft is one of the mechanical components of the vehicle engine, and quality control of it holds significant importance in the production line. In this paper, a vision-based system was developed to detect apparen...
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ISBN:
(纸本)9798350350494;9798350350500
Crankshaft is one of the mechanical components of the vehicle engine, and quality control of it holds significant importance in the production line. In this paper, a vision-based system was developed to detect apparent structural defects on the crankshaft surface. By examining the different approaches in computervision tasks, the semantic segmentation technique was chosen to solve this problem. In the first stage, a dataset consisting of 400 crankshaft experimental images with structural defects such as scratch, pitting, and grinding were collected. Then, the Convolutional Neural Network (CNN) with MobileNet architecture was trained to detect apparent defects, and an Intersection over Union (IoU) evaluation criteria of 64.7% was obtained. In the third stage, some imageprocessing techniques were used to increase the performance. By applying the DexiNed edge detection filter on the train-set images, the IoU was increased by 8.4%. Considering the importance of this issue in the automotive industry, it has been tried again to boost the performance by augmenting the dataset images. On the other hand, this can also prevent overfitting of the model. By training the model under the same conditions as the previous stages, the IoU in this stage increased by 13.2% and reached 86.3%.
image registration is the first step in many application areas such as computervision, remote sensing and medical imageprocessing. image registration is achieved by aligning two or more images according to the estim...
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ISBN:
(纸本)9781424444731
image registration is the first step in many application areas such as computervision, remote sensing and medical imageprocessing. image registration is achieved by aligning two or more images according to the estimated transformation between them. In this paper, we present an image registration algorithm, which combines the multi-scale wavelet transform with Scale Invariant Feature Transform (SIFT). First, images are decomposed into multiple scales using Wavelet Transform (WT), then the low frequency (approximation) image at certain level is input to SIFT algorithm. The proposed algorithm speeds up the calculation of the correspondences between images. Experimental results with different remote sensing images illustrate the accuracy of proposed algorithm.
The license plate recognition is widely used in daily life. Basically, the license plate recognition process is divided into two phases: detection and recognition. Most of the previous studies are simply use conventio...
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ISBN:
(纸本)9781450377201
The license plate recognition is widely used in daily life. Basically, the license plate recognition process is divided into two phases: detection and recognition. Most of the previous studies are simply use conventional pattern recognition techniques or deep learning. Therefore, the industrial computervision library (Euresys Open evision) and deep learning are integrated to fulfill license plate recognition and presented in this paper. The proposed approach is divided into three phases: the first phase is to apply deep learning to detect the license plate in the image with a complicated background. The second phase is the license plate correction. A perspective transformation is used to correct the angle of the license plate. Finally, optical character recognition (OCR) is used to recognize the license plate. According to the experimental results, the accuracy of the proposed approach can reach 96.7% with an average identification time of 63.4ms. It shows that the proposed approach is feasible in a practical environment.
Hyperspectral image denoising is an essential pre-processing task. In this paper, a multi-resolution gated network based on wavelet transform (WMRGNet) is proposed for removing mixed noise of hyperspectral images. Fir...
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The role of computervision technology in the field of artificial intelligence development is very important, but there is a problem of poor application effect of key technologies. Traditional neural network algorithm...
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We present a method to identify the owner of a photo album taken off a social networking site. We consider this as a problem of prominent person mining. We introduce a new notion of prominent persons, and propose a gr...
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Breast cancer is one of the most dangerous diseases among women. Different methods are used to diagnose this cancer that among these, imaging and computer-aided systems are more common. In these systems, one of the mo...
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ISBN:
(纸本)9798350350494;9798350350500
Breast cancer is one of the most dangerous diseases among women. Different methods are used to diagnose this cancer that among these, imaging and computer-aided systems are more common. In these systems, one of the most important step is preprocessing and removing unnecessary areas of the images, as well as extracting the chest area. In this paper, we present a method that consists of preprocessing, feature extraction, and using a machine learning classifier. In the preprocessing step, we propose a method to extract the region of interest in both angles of mammography images. The proposed novel method includes applying gamma correction thresholding to the images and obtaining two binary images based on the proposed threshold using the Otsu method. Results show the proposed method successfully removes the chest muscle with 98% accuracy. In the next, for feature extraction phase, we utilize three different methods for extracting features. Finally, by employing an Extra tree model classifier, we classify mammography images into normal and abnormal. By incorporating the block-based feature extraction method, we achieve 98% accuracy in classification. Overall, our approach demonstrates the effectiveness of preprocessing and feature extraction for diagnosing breast cancer using mammography images.
In this paper, a non-contact, unmarked computervision measurement method is presented and applied to measure the two-dimensional (2D) vibration displacement of hoisting vertical ropes. In this method, the primary wor...
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ISBN:
(纸本)9781450375511
In this paper, a non-contact, unmarked computervision measurement method is presented and applied to measure the two-dimensional (2D) vibration displacement of hoisting vertical ropes. In this method, the primary work is to perform camera calibration of monocular vision using a neural network (NN) model. Then, in the image sequence, a straight line perpendicular to the hoisting rope is added by digital imageprocessing (DIP) method, and their intersection region is regarded as the measuring target. Digital image correlation (DIC) algorithm at sub-pixel level is applied to locate the measuring target in image sequence. This method is used to measure the vibration displacement of an actual hoisting rope in mine, and the measurement results of three targets on the rope are consistent with tiny amplitude differences, which indicates that this method is feasible for the vibration measurement of hoisting vertical rope.
Irregular-shape food processing by robotic arms like shrimp picking is a common problem in industrial automation, which can be summarized as localization of particular points on an image, emphasizing on both good accu...
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ISBN:
(纸本)9781450365307
Irregular-shape food processing by robotic arms like shrimp picking is a common problem in industrial automation, which can be summarized as localization of particular points on an image, emphasizing on both good accuracy and high speed with relatively very limited hardware resources. In most cases, the points do not have a distinct visual characteristic in color or size. In this paper, first we outline the suspicious search range resorting to intelligently learning the coarse mapping function between shrimp shape and target points, based on the proposed contour model of shrimp body, which significantly simplifies numerical representation of the original image. Next, priori knowledge of the shrimp body is used for more accurate fine localization of the target points. More specifically, in this step, the shrimp body pose is normalized for edge extraction after proper rotation and projection. The extracted edge curve on the back of the shrimp is then analyzed to accurately pick out the target corner point. During validation, in the search region detection step, the method is able to efficiently avoid wrong search in neighboring joints of shrimp body. After finer localization of the target points, the final detection rate turns out to be 93%.
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