Saliency Detection Model for Low Contrast Images Based on Amplitude Spectrum Analysis and Superpixel Segmentation

2016 ◽  
pp. 454-460
Author(s):  
Hua Yang ◽  
Xin Xu ◽  
Nan Mu
Keyword(s):  
Spectrum Analysis ◽  
Saliency Detection ◽  
Amplitude Spectrum ◽  
Low Contrast ◽  
Superpixel Segmentation ◽  
Detection Model

scholarly journals Bottom-Up Saliency Detection Model Based on Amplitude Spectrum

2011 ◽  
pp. 370-380 ◽  
Author(s):  
Yuming Fang ◽  
Weisi Lin ◽  
Bu-Sung Lee ◽  
Chiew Tong Lau ◽  
Chia-Wen Lin
Keyword(s):  
Saliency Detection ◽  
Amplitude Spectrum ◽  
Bottom Up ◽  
Detection Model ◽  
Model Based

Bottom-Up Saliency Detection Model Based on Human Visual Sensitivity and Amplitude Spectrum

2012 ◽  
Vol 14 (1) ◽  
pp. 187-198 ◽  
Author(s):  
Yuming Fang ◽  
Weisi Lin ◽  
Bu-Sung Lee ◽  
Chiew-Tong Lau ◽  
Zhenzhong Chen ◽  
...  
Keyword(s):  
Saliency Detection ◽  
Amplitude Spectrum ◽  
Visual Sensitivity ◽  
Bottom Up ◽  
Detection Model ◽  
Model Based

scholarly journals Superpixel Segmentation Based on Anisotropic Edge Strength

2019 ◽  
Vol 5 (6) ◽  
pp. 57 ◽  
Author(s):  
Gang Wang ◽  
Bernard De Baets
Keyword(s):  
Distance Measure ◽  
Saliency Detection ◽  
Experimental Results ◽  
Segmentation Method ◽  
Superpixel Segmentation ◽  
Gaussian Kernels ◽  
First Derivative ◽  
Edge Strength

Superpixel segmentation can benefit from the use of an appropriate method to measure edge strength. In this paper, we present such a method based on the first derivative of anisotropic Gaussian kernels. The kernels can capture the position, direction, prominence, and scale of the edge to be detected. We incorporate the anisotropic edge strength into the distance measure between neighboring superpixels, thereby improving the performance of an existing graph-based superpixel segmentation method. Experimental results validate the superiority of our method in generating superpixels over the competing methods. It is also illustrated that the proposed superpixel segmentation method can facilitate subsequent saliency detection.

A real time detection method for abnormal strapping of steel coil based on CCD active imaging

2021 ◽  
Author(s):  
Chuan Ye ◽  
Liming Zhao ◽  
Qiyan Wang ◽  
Bo Pan ◽  
Youchun Xie ◽  
...  
Keyword(s):  
Maximum Entropy ◽  
Detection Method ◽  
Saliency Detection ◽  
Automatic Segmentation ◽  
Engineering Application ◽  
Detection Accuracy ◽  
Steel Coil ◽  
Detection Model ◽  
Laser Stripe ◽  
Active Imaging

Abstract In order to accurately detect the abnormal looseness of strapping in the process of steel coil hoisting, an accurate detection method of strapping abnormality based on CCD structured light active imaging is proposed. Firstly, a maximum entropy laser stripe automatic segmentation model integrating multi-scale saliency features is constructed. With the help of saliency detection model, the purpose is to reduce the interference of the environment to the laser stripe and highlight the distinguishability between the stripe and the background. Then, the maximum entropy is used to segment the fused saliency features and accurately extract the stripe contour. Finally, the stripe normal field is obtained by calculating the stripe gradient vector, the stripe center line is extracted based on the stripe distribution normal direction, and the abnormal strapping is recognized online according to the stripe center. Experiments show that the proposed method is effective in terms of detection accuracy and time efficiency, and has certain engineering application value.

scholarly journals Double Low-Rank and Sparse Decomposition for Surface Defect Segmentation of Steel Sheet

2018 ◽  
Vol 8 (9) ◽  
pp. 1628 ◽  
Author(s):  
Shiyang Zhou ◽  
Shiqian Wu ◽  
Huaiguang Liu ◽  
Yang Lu ◽  
Nianzong Hu
Keyword(s):  
Steel Sheet ◽  
Surface Defect ◽  
Detection System ◽  
Saliency Detection ◽  
Image Understanding ◽  
Low Rank ◽  
Sparse Decomposition ◽  
Detection Model ◽  
Otsu’S Method ◽  
Surface Defect Detection

Surface defect segmentation supports real-time surface defect detection system of steel sheet by reducing redundant information and highlighting the critical defect regions for high-level image understanding. Existing defect segmentation methods usually lack adaptiveness to different shape, size and scale of the defect object. Based on the observation that the defective area can be regarded as the salient part of image, a saliency detection model using double low-rank and sparse decomposition (DLRSD) is proposed for surface defect segmentation. The proposed method adopts a low-rank assumption which characterizes the defective sub-regions and defect-free background sub-regions respectively. In addition, DLRSD model uses sparse constrains for background sub-regions so as to improve the robustness to noise and uneven illumination simultaneously. Then the Laplacian regularization among spatially adjacent sub-regions is incorporated into the DLRSD model in order to uniformly highlight the defect object. Our proposed DLRSD-based segmentation method consists of three steps: firstly, using DLRSD model to obtain the defect foreground image; then, enhancing the foreground image to establish the good foundation for segmentation; finally, the Otsu’s method is used to choose an optimal threshold automatically for segmentation. Experimental results demonstrate that the proposed method outperforms state-of-the-art approaches in terms of both subjective and objective tests. Meanwhile, the proposed method is applicable to industrial detection with limited computational resources.

Spectrum Analysis of Infrasound Signal

2014 ◽  
Vol 644-650 ◽  
pp. 4334-4337
Author(s):  
Bin Wang
Keyword(s):  
Frequency Spectrum ◽  
Frequency Distribution ◽  
Spectrum Analysis ◽  
Sound Pressure ◽  
Power Level ◽  
Amplitude Spectrum ◽  
Frequency Component ◽  
Pressure Amplitude ◽  
Frequency Spectrum Analysis ◽  
Infrasound Signal

In this paper, frequency spectrum of infrasound signal collected was analyzed based on MATLAB. The infrasound power level of change with frequency distribution and the infrasound harmonic of each frequency component of the sound pressure amplitude can be made up judgment visually by frequency spectrum analysis and amplitude spectrum analysis, and thus we can obtain different conditions of infrasound properties scientifically and quantitatively.

scholarly journals Oil seal surface defect detection using superpixel segmentation and circumferential difference

2020 ◽  
Vol 17 (6) ◽  
pp. 172988142097651
Author(s):  
Zhendong He ◽  
Jie Liu ◽  
Liying Jiang ◽  
Suna Zhao ◽  
Lei Zhang ◽  
...  
Keyword(s):  
Surface Defect ◽  
Surface Defects ◽  
Vision System ◽  
Small Variation ◽  
Low Contrast ◽  
Superpixel Segmentation ◽  
Surface Image ◽  
Surface Defect Detection ◽  
Key Issues ◽  
Background Difference

Surface defects affect the quality and safety of oil seals. It is a challenge to detect such defects in a vision system because of the unequal reflection property of oil seal surfaces and low contrast between the defect and the background. This article proposes a visual detection method (VDM) for oil seal surface defects and outlines two key issues of VDMs. First, we present a superpixel segmentation algorithm based on the significant gray level variation in the radial direction of an oil seal surface image. This image is then divided into several ring belts. Subsequently, considering the reflection inequality and low contrast, we propose a new circumferential background difference algorithm based on the small variation along the circumferential direction of the image. This algorithm eliminates the influence of the reflection inequality and improves the contrast distinction between the defects and the background. The experimental results verify the effectiveness of the proposed method with a recall and precision as high as 95.2% and 86.8%, respectively.

Applications and New Research of Visual Saliency and Attention

2013 ◽  
Vol 333-335 ◽  
pp. 1171-1174
Author(s):  
Fan Hui ◽  
Ren Lu ◽  
Jin Jiang Li
Keyword(s):  
Visual Attention ◽  
Quality Evaluation ◽  
Saliency Detection ◽  
Video Quality ◽  
Visual Saliency ◽  
Attention Model ◽  
Detection Model ◽  
Detection Algorithms ◽  
New Research ◽  
Video Quality Evaluation

Drawing on the suvey of visual attention degree and its significance in psychology and physiology , in recent years, researchers have proposed a lot of visual attention model and algorithms, such as Itti model and many saliency detection algorithms. And in recent years, the researchers applied the visual attention of this technology in a lot of directions, such as a significant regional shifts and visual tracing detection model based on network loss, for video quality evaluation. This paper summarizes the various algorithms and its application of visual attention and its significance.

scholarly journals A Novel GBM Saliency Detection Model Using Multi-Channel MRI

PLoS ONE ◽  
2016 ◽  
Vol 11 (1) ◽  
pp. e0146388 ◽  
Author(s):  
Subhashis Banerjee ◽  
Sushmita Mitra ◽  
B. Uma Shankar ◽  
Yoichi Hayashi
Keyword(s):  
Saliency Detection ◽  
Detection Model
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