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Municipal solid waste incineration (MSWI) becomes the most popular technique to enhance environment protection. This process produces one of the most toxic chemicals in the world, i.e., polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs). The dioxin (DXN) production should be restricted rigidly by using operation optimization and control of MSWI process based on present industrial...
Nowadays, camcorder piracy has great impact on the motion picture industry. Although some watermarking technologies can track the movie pirate, the video content viewed in the theater may be affected and they cannot obstruct the need of pirated movie because the watermarks in pirated moves are invisible. This paper presents a new method to defeat camcorder piracy and realize content protection in...
JPEG is a most commonly used standard of compression for digital images. Quality factor (Qfactor) for JPEG compressed image is actually a suitable indicator to the perceptual quality. However, the information of the compressor might be unknown due to various reasons. To evaluate the Qfactor, we recompress the formerly compressed image and measure the consistency between them. Then we define the fixed...
To blindly evaluate the visual quality of image is of great importance in many image processing and computer vision applications. In this paper, we develop a novel training-free no-reference (NR) quality metric (QM) based on a unified brain theory, namely, free energy principle. The free energy principle tells that there always exists a difference between an input true visual signal and its processed...
In-loop filtering is an important technique in modern video coding standards. In this paper, we propose a transform-domain in-loop filter to further improve the compression performance of high efficiency video coding (HEVC) standard. The proposed method estimates block transform coefficients by adaptively fusing two prediction sources according to their uncertainties respectively. The first prediction...
With the development of the modern technology, there is increasing a lot of important secret information to be protected. In this paper, an information security display system based on spatial psychovisual modulation (SPVM) is introduced on the android mobile platform. SPVM is a new way of information display technology which is conceived as an interplay of signal processing, optoeletronics and psychophysics...
We propose an improved algorithm for no-reference image quality assessment (NR-IQA) using the convolutional neural network (CNN) and neural theory based saliency detection. Firstly, we extract non-overlapping patches from the input image. For each patch, we obtain the quality score by CNN network, which consists of seven layers and integrates feature learning and regression into image patch quality...
Spatial psychovisual modulation (SPVM) is a new information display technology, which aims to generate multiple visual percepts for different viewers on a single display simultaneously. After the proposal of SPVM, lots of efforts have been made and several applications (i.e., dual-view display system) have been implemented based on this technology. The dual-view display (DVD) system is considered...
In this paper, we propose a reduced-reference scheme for evaluating the quality of blurred images under the theory of free-energy principle. Specifically, the free-energy principle indicates that the brain tries to account for the input image with an internal generative model and the discrepancy between the image and its model-explained version, which can be measured by free energy, is related to...
Tracking the object with stable features is an important and challenging task in real scenes where the object appearance constantly changes or is disturbed by the background etc. In this paper, a novel frame work of object representation and tracking based on stable feature mining is presented. Firstly, the object region is adaptively detected and then the peak contour of V color component histogram...
Blur plays an key part in evaluating of camera image quality. It leads to decrease of high frequency information and accordingly changes the image energy. Recent researches in quaternion singular value decomposition show that the quaternion's singular values and associated vectors can capture the distortion of color images, and thus singular values can be utilized to assess the sharpness of camera...
Depth-Image-Based-Rendering (DIBR) is fundamental in free-viewpoint 3D video, which has been widely used to generate synthesized views from multi-view images. The majority of DIBR algorithms cause disoccluded regions, which are the areas invisible in original views but emerge in synthesized views. The quality of synthesized images is mainly contaminated by distortions in these disoccluded regions...
In this paper we propose a novel bottom-up visual saliency detection model by analysis of image complexity. Compared with existing works, we emphasize the important impact of image complexity on saliency detection. Inspired by the free energy theory, a hybrid parametric and non-parametric model is used to estimate the complexity of a visual signal. Taking the image complexity as a new feature, this...
Block-based compression causes severe pseudo structures. We find that the pseudo structures of images compressed by different levels show some degree of similarity. So we propose to evaluate the quality of compressed images via the similarity between pseudo structures of two images. To obtain a “reference” image, we introduce the most distorted image (MDI), which is derived from the distorted image...
Saliency detection is a powerful tool for many applications because it can provide valuable information reflecting human visual attention. Quadtree decomposition is a classical and efficient image operator which can divide image into square blocks in different scales. The blocks in smaller size contain valuable information such as edges and texture. In image lossy compression or similar applications,...
Most of existing visual quality assessment algorithms are tested on standard databases that are created in controlled viewing conditions (e.g. display device, viewing distance and lighting). This implies that all the recoded subjective scores are only valid for the specific settings used in the database. However, with the prevalence of mobile devices, the practical viewing environments can significantly...
Three-dimensional (3D) imaging technology has been growingly prevalent in today's world. But objective quality assessment of 3D images is a challenging task. In this paper, we try to investigate and develop the 2D image quality metrics into stereoscopic image quality assessment using a dual-weight model within the concept of free energy principle and human visual system. On the basis of a psychological...
Three-dimensional (3D) imaging technology has been growingly prevalent in today's world. But objective quality assessment of 3D images is a challenging task. In this paper, we propose a blind metric to predict the perceptual quality of stereopairs within the concept of free energy. On the basis of a psychological measure, the free energy is a principle telling where supervises more and attracts human...
In image / video systems, the contrast adjustment which manages to enhance the visual quality is nowadays an important research topic. Yet very limited efforts have been devoted to the exploration of image quality assessment (IQA) for contrast adjustment. To address the problem, this paper proposes a novel reduced-reference (RR) IQA metric with the integration of bottom-up and top-down strategies...
In this paper we study common, camera-specific kinds of distortions and propose a no-reference image quality assessment algorithm for photographic images produced by consumer devices. Those real consumer-type images, being different from simulated-distortion images, are with realistic artifacts and quality ranges. We find that the state-of-the-art no-reference image quality assessment approaches do...
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