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Filtreler
Bulunan: 11 Adet 0.002 sn
Yazar/lar : MENDİ, Engin ✕Atıf Dizini : Scopus ✕
Koleksiyon [3]
İlgili Araştırmacılar [1]
Ambargo Durumu [1]
Tam Metin [1]
Yayın Türü [2]
Yazar/lar [19]
Atıf Dizini [2]
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Yayıncı [7]
Tez Danışmanı [1]
Yayın Tarihi [5]
Yayın Dili [3]
Erişime Açık

Image Quality Assessment Metrics Combining Structural Similarity and Image Fidelity with Visual Attention

MENDİ, Engin

Image quality assessment has a great importance in several image processing applications. Recently, various objective image quality metrics have been proposed in order to predict human visual perception. In this paper, novel image quality metrics, S-SSIM (saliency-based structural similarity index) and S-VIF (saliency-based visual information fidelity), are proposed based on a visual attention model extracting frequency-tuned salient region. Saliency maps are produced from the color and luminance features of the image. SSIM and VIF in pixel domain are modified by the weighting factors of the s ...Daha fazlası

Makale 2015 1 Görüntülenme
Erişime Açık

Hierarchical representation of video sequences for annotation

MENDİ, Engin

Video annotation is an important issue in video content management systems. Rapid growth of the digital video data has created a need for efficient and reasonable mechanisms that can ease the annotation process. In this paper, we propose a novel hierarchical clustering based system for video annotation. The proposed system generates a top-down hierarchy of the video streams using hierarchical k-means clustering. A tree-based structure is produced by dividing the video recursively into sub-groups, each of which consists of similar content. Based on the visual features, each node of the tree is ...Daha fazlası

Makale 2014 Elsevier Ltd 3 Görüntülenme
Erişime Açık

Towards and Adaptive Brain- Computer Interface- An Error Potential Approach

FIGUEIREDO, Nuno | SILVA, Filipe | GEORGIEVA, Petia | MILANOVA, Mariofanna | MENDİ, Engin

In this paper a new adaptive Brain Computer Interface (BCI) architecture is proposed that allows to autonomously adapt the BCI parameters in malfunctioning situations. Such situations are detected by discriminating EEG Error Potentials and when necessary the BCI mode is switched back to the training stage in order to improve its performance. First, the modules of the adaptive BCI are presented, then the scenarios for identification of the user reaction to intentionally introduced errors are discussed and finally promising preliminary results are commented. The proposed concept has the potentia ...Daha fazlası

Konferans Bildirisi 2015 Springer Verlag 2 Görüntülenme
Erişime Açık

Unsupervised Change Detection using Thin Cloud-Contaminated Landsat Images

YAVARIABDI, Amir | KUSETOĞULLARI, Hüseyin | MENDİ, Engin | KARABATAK, Begüm

In this paper, a novel unsupervised change detection method is proposed to automatically detect changes between two cloud-contaminated Landsat images. To achieve this, firstly, a photometric invariants technique with Stationary Wavelet Transform (SWT) are applied to input images to decrease the influence of cloud and noise artifacts in the change detection process. Then, mean shift image filtering is employed on the sub-band difference images, generated via image differencing technique, to smooth the images. Next, multiple binary change detection masks are obtained by partitioning the pixels i ...Daha fazlası

Konferans Bildirisi 2018 Institute of Electrical and Electronics Engineers Inc. 5 Görüntülenme
Erişime Açık

Monitoring of Miner by RF Signal

SARAY, Tuğba | ÇETİNKAYA, Ali | MENDİ, Engin

Wireless communication technology is spreading rapidly to all areas of our lives. The technology, which has a wide range of applications from radios, intelligent home systems, automation applications to GPS units, was used in monitoring the workers working in mines in this study. Most of the mining area underground mining is risky and the possibility of accident (gas jams, the explosion and dents, etc.) is the area of high. Locating is vital in this line of work when a sudden accident or dent occurred in which the worker will be known and the position of the recovery efforts can be intensified ...Daha fazlası

Konferans Bildirisi 2017 Institute of Electrical and Electronics Engineers Inc. 4 Görüntülenme
Erişime Açık

A Novel Method and Mobile System for Accurate Heart Rate Measurement from Finger and Face

GÖNÜLTAŞ, Emre | DEMİRBAŞÇI, Oğuz | MENDİ, Engin

Heart rate is an important vital indicator which provides information about the rhythm of the heart and helps in diagnosing several heart diseases. As it can be usually determined manually, there are also some medical devices that automatically measure heart rate. Measuring heart rate quickly and consistently may play important role in the early detection of heart attack and various heart rate related disorders. In this work, a mobile based system that performs quick and practical heart rate measurement. Processing RGB color changes in the image frames recorded from finger or face, which canno ...Daha fazlası

Konferans Bildirisi 2016 Institute of Electrical and Electronics Engineers Inc. 2 Görüntülenme
Erişime Açık

A Study of Sound Transmission Loss for Building Materials Using Simulative and Experimental Approaches

MENDİ, Engin

The sound insulation models that we use in this study are based on theoretical computations and their aim is to reduce time, labor and cost consumption during the calculation of “Sound Transmission Loss (R)” of a particular material experimentally. In this study, for 11 different materials, we compare the performance of various simulation models with the experimental results that are already available in the literature. The experiments were carried out with Bastian, Akuzoft, Insul and dBKAisla model. The analyses were conducted in the standards of ISO 12354, ISO 10140 and ISO 717 in 1/3 octave ...Daha fazlası

Makale 2016 AKSOYLU, Ceyhun Gazi Universitesi Muhendislik-Mimarlik 6 Görüntülenme
Erişime Açık

A Comparative Analysis of Digital Filtering for Seismic Signals from Adana, Van, and Bingol Earthquakes in Turkey

AL-KATEEB, Samer | MENDİ, Engin | BAYRAK, Coşkun

This paper includes a comparative application of the digital filters on data processing for the strong motion data recorded during earthquakes. Three types of digital, acausal filters (designed by Butterworth, Bessel, and Chebyshev type I) with N=4 were used to remove the unwanted noise. The data has been collected from three different stations located in Turkey (Adana, Van, and Bingol) that are working with a digital type of seismograph (Guralp cmg5td and SigSasmach). Those stations are close to the earthquake events with different moment magnitudes Mw = 4.5, 3.8, and 3.3. The SAC software to ...Daha fazlası

Konferans Bildirisi 2015 Science and Engineering Institute 2 Görüntülenme
Erişime Açık

Effective 3D Surface Modeling for Geographic Information Systems

MENDİ, Engin | ALPARSLAN, Mesut | YÜKSEK, Kemal

Abstract. In this work, we propose a dynamic, flexible and interactive urban digital terrain platform with spatial data and query processing capabilities of geographic information systems, multimedia database functionality and graphical modeling infrastructure. A new data element, called Geo-Node, which stores image, spatial data and 3-D CAD objects is developed using an efficient data structure. The system effectively handles data transfer of Geo-Nodes between main memory and secondary storage with an optimized directional replacement policy (DRP) based buffer management scheme. Polyhedron st ...Daha fazlası

Makale 2016 Copernicus Gesellschaft Mbh 5 Görüntülenme
Erişime Açık

Turkish Sign Language Animation with Motion Capture

SÖYLEV, Arda | MENDİ, Engin

In this paper, using motion capture, we study on Turkish Sign Language Animation. A markerless system, Microsoft Kinect sensor and a professional optical system are compared. Besides, we use the motion capture data in two different approaches; data driven and real time. To animate the sign language, we merge the motion capture output with a cartoon character. In the first approach, which is data-driven, motion capture data is recorded, processed and converted to a character animation off-line. This data is stored in a database and it can be used in mobile devices or any other necessary ways. R ...Daha fazlası

Konferans Bildirisi 2014 IEEE Computer Society 1 Görüntülenme
Erişime Açık

Real-Time Resistor Color Code Recognition using Image Processing in Mobile Devices

DEMİR, Muhammed Fatih | ÇANKIRLI, Ayşenur | KARABATAK, Begüm | YAVARIABDI, Amir | MENDİ, Engin | KUSETOĞULLARI, Hüseyin

This paper proposes a real-time video analysis algorithm to read the resistance value of a resistor using a color recognition technique. To achieve this, firstly, a nonlinear filtering is applied to input video frame to smooth intensity variations and remove impulse noises. After that, a photometric invariants technique is employed to transfer the video frame from RGB color space to Hue-Saturation-Value (HSV) color space, which decreases sensitivity of the proposed method to illumination changes. Next, a region of interest is defined to automatically detect resistor's colors and then an Euclid ...Daha fazlası

Konferans Bildirisi 2018 Institute of Electrical and Electronics Engineers Inc. 3 Görüntülenme
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