Papers by Dang Thanh Trung
2013 Colour and Visual Computing Symposium (CVCS), 2013
ABSTRACT
Abstract—Recently, digital image inpainting has attracted strong research interest because of its... more Abstract—Recently, digital image inpainting has attracted strong research interest because of its extensive applications in real life. The terminology ”inpainting ” refers to automatic restoration of image defects such as scratches or blotches as well as removal of unwanted objects as, for instance, subtitles, logos, etc, such that it is undetectable by viewers without the reference to the original image. Many works on this subject have been pub-lished in recent years. This paper introduces a novel unsupervised image completion framework using a modified exemplar-based method in conjunction with a pyramidal representation of an image. A top-down iterative completion is performed gradually with multi-resolution patches and a window-based priority. The proposed approach is verified on different natural images. Also, a comparison with some existing methods coming from literature is carried out and the results show improvement in favor of our approach. Keywords—inpainting, image complet...
Abstract—Recently, digital image inpainting has attracted strong research interest because of its... more Abstract—Recently, digital image inpainting has attracted strong research interest because of its extensive applications in real life. The terminology ”inpainting ” refers to automatic restoration of image defects such as scratches or blotches as well as removal of unwanted objects as, for instance, subtitles, logos, etc, such that it is undetectable by viewers without the reference to the original image. Many works on this subject have been pub-lished in recent years. This paper introduces a novel unsupervised image completion framework using a modified exemplar-based method in conjunction with a pyramidal representation of an image. A top-down iterative completion is performed gradually with multi-resolution patches and a window-based priority. The proposed approach is verified on different natural images. Also, a comparison with some existing methods coming from literature is carried out and the results show improvement in favor of our approach. Keywords—inpainting, image complet...
Abstract—The increasingly use of digital images in our daily life and the availability of powerfu... more Abstract—The increasingly use of digital images in our daily life and the availability of powerful software for processing and editing images, open new challenges regarding illegal or unauthorized image manipulation. Thus, it becomes essential to authenticate digital copies, validate their content, and detect possible forgeries. In this paper, we focus on detection of a specific type of digital forgery, inpainting, where an object is removed using pixels coming from the same image. The problem of inpainting detection is investigated and an efficient and reliable detection method is proposed. The performance of the proposed method is demonstrated on several inpainted images using different inpainting techniques. Index Terms—Inpainting forgery detection, digital tamper detection, digital image forensics. I.
From the pictures, the modeling of thorax is created by stereo matching technique. Delaunay trian... more From the pictures, the modeling of thorax is created by stereo matching technique. Delaunay triangulation strategy is used to make a 2D mesh model. Some parameters are added for the modeling before calculating. ro the pictures, the odeling of thorax is created by stereo atching technique. elaunay triangulation strategy is used to ake a 2 esh odel. o e para eters are added for the odeling before calculating. The forward problem was solved by
Digital image enhancement is to improve the appearance of images to human viewers. This is one of... more Digital image enhancement is to improve the appearance of images to human viewers. This is one of extremely difficult issues in image processing. The NECI algorithm (Natural Enhancement of Color Image) is a robust and effective approach for color image enhancement. The core of this algorithm is Retinex model, a simulation model of human color vision. A fully framework for enhancement process is composed of four main steps: global tone mapping, Retinex-based local contrast enhancement, histogram rescaling, and texture enhancement. The experimental results on different types of natural images show that the proposed algorithm not only preserves the ambience of image but also avoid side effects such as light condition changes, color temperature alteration, or additional artifacts, etc which lead to unnaturally sharpened images or dramatic white balance changes. In the output color images, no additional light sources are added to the scene, or no halo effect and blocking effect are ampli...
2019 11th International Conference on Knowledge and Systems Engineering (KSE), 2019
One of important issue needs attention in the area of old film storage and restoration is blotch ... more One of important issue needs attention in the area of old film storage and restoration is blotch handling. In this work, a new proposal including an automatic detection method and inpainting scheme is introduced. First, a technique for automatically detecting blotches based on local changes of pixels on consecutive frames is applied. Specifically, a two-stage Simplified Ranked Order Difference detector is proposed to identify blotches on frames. Next, an improved inpainting was applied to restore the blotches so that it is undetectable by viewers. Our proposal is executed automatically without extenal parameters. The proposal has been tested on a serial of natural images with different sizes and resolutions. Experimental results show that our approach has successfully removed with fairly high accuracy and quite smooth restored blotches. Based on result analysis, the proposal has many potential and applications in the future. Index Terms—blotch detection, blotch removal, restoration,...
Digital image inpainting technique could provide substantial support for future restoration of im... more Digital image inpainting technique could provide substantial support for future restoration of images. However, much less effort has been devoted to the development of image inpainting evaluation. In this paper, we proposed a novel objective metric for assessing the quality of color image inpainting which takes into account some constraints and characteristics related to the specific objectives of inpainting approaches. The used characteristics are the visual coherence of the recovered regions and the visual saliency describing the visual importance of the area. A series of psychophysical experiments have been conducted to evaluate the performance of the proposed image quality index. The results show that the proposed image quality metric is well adapted for image quality inpainting evaluation.
Advances in Intelligent Systems and Computing, 2014
2013 IEEE International Conference on Image Processing, 2013
2008 IEEE International Conference on Research, Innovation and Vision for the Future in Computing and Communication Technologies, 2008
The electrocardiogram inverse problem is a non-linear and ill-posed problem for which it is very ... more The electrocardiogram inverse problem is a non-linear and ill-posed problem for which it is very difficult to find an exact solution. In this paper, we presented an efficient and robust method to solve this problem. The heart activity is modeled by a single moving dipole and the human body is considered as finite volume conductor constructed based on an anatomic atlas. For solution method, finite element method is applied to the forward problem. The volume conductor is meshed into arbitrary triangular elements. The efficiency of the methods stems from the employment of genetic algorithm for minimization of difference between the measured potentials and the calculated potentials generated from a predicted dipole source. Finally, the algorithm is successfully tested with simulation model and used to estimate dipole source for real data obtained from 31 electrodes on body surface. As a result, the equivalent dipole always moves clockwise and its direction changes counterclockwise. ©2008 IEEE.
2014 IEEE Global Conference on Signal and Information Processing (GlobalSIP), 2014
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Papers by Dang Thanh Trung