Results 41 to 50 of about 1,495,143 (296)

Detection of electrocardiogram atrial fibrillation using modified multifractal detrended fluctuation analysis based on discrete transforms and fractional Fourier transform

open access: yesDiscover Applied Sciences
Cardiovascular diseases (CVD) are the most common cause of death. Electrocardiography (ECG) is a preferred non-invasive method for detecting heart diseases. Atrial fibrillation (AF) is a common cardiac disease.
Mohamed Moustafa Azmy
doaj   +1 more source

Directional Analytic Discrete Cosine Frames

open access: yesIEEE Access, 2022
Block frames called directional analytic discrete cosine frames (DADCFs) are proposed for sparse image representation. In contrast to conventional overlapped frames, the proposed DADCFs require a reduced amount of 1) computational complexity, 2) memory ...
Seisuke Kyochi   +2 more
doaj   +1 more source

STUDI DAN IMPLEMENTASI WATERMARKING CITRA DIGITAL DENGAN PENDEKATAN DISCRETE COSINE TRANSFORM [PDF]

open access: yes, 2010
STUDI DAN IMPLEMENTASI WATERMARKING CITRA DIGITAL DENGAN PENDEKATAN DISCRETE COSINE TRANSFORM - watermarking, discrete cosine transform, citra diijital, hak cipta ...
ALBERT JANUAR LINARCO, LIE
core  

Grayscale Photomasks Enable Noncontact Optical Patterning of Hydroxypropyl Cellulose Gels for Dynamic Art

open access: yesAdvanced Functional Materials, EarlyView.
Mask‐encoded UV exposure translates digital color information into pixel‐resolved structural‐color patterns in hydroxypropyl cellulose gels. Gaussian‐process‐guided calibration links UV processing conditions, wavelength, and mask opacity, enabling parallel fabrication of multicolor images in a single 10 s exposure.
Mengting Ye   +8 more
wiley   +1 more source

Cyclic Wiener Filtering Algorithm in Discrete Cosine Transform Domain for Vibration Signal

open access: yesMATEC Web of Conferences, 2016
In order to solve the problem that the effect of using cyclic Wiener filter directly to remove the noise on the non-stationary vibration signal is poor, the paper applies discrete cosine transform to the cyclic Wiener filter, proposing the cyclic Wiener ...
Zhang Feng   +3 more
doaj   +1 more source

PERANCANGAN PROGRAM APLIKASI PENGURANGAN DUPLIKASI FILE MUSIK DENGAN METODE INVERSE MODIFIED DISCRETE COSINE TRANSFORM [PDF]

open access: yes, 2011
PERANCANGAN PROGRAM APLIKASI PENGURANGAN DUPLIKASI FILE MUSIK DENGAN METODE INVERSE MODIFIED DISCRETE COSINE TRANSFORM - IMDCT (Inverse Modified Discrete Cosine Transform), perbandingan mp3, duplikasi file ...
XAVERIUS FERRYADI, FRANSISKUS
core  

Liquid‐Crystal‐Based Reconfigurable Intelligent Surface for 7 GHz Mobile Communication

open access: yesAdvanced Materials Technologies, EarlyView.
The glass‐based liquid‐crystal reconfigurable intelligent surface (LC‐RIS) integrates active‐matrix driving and blind‐greedy phase optimization within a 5G‐NR OFDM framework. This enables continuously tunable and autonomous enhancement of wireless coverage. Leveraging the transparency and manufacturability of liquid crystal panels, it is ideally suited
Tien‐Lun Ting   +5 more
wiley   +1 more source

Image Hiding Using Discrete Cosine Transform

open access: yesمجلة كلية التربية للبنات, 2019
Steganography is a mean of hiding information within a more obvious form of communication. It exploits the use of host data to hide a piece of information in such a way that it is imperceptible to human observer.
ايمان محمد جعفر فرح جاسم محمد
doaj  

Effect of DCT Image Compression on Eye Gaze Direction Detection

open access: yesITM Web of Conferences, 2018
The prediction of eye direction detection is the one of the popular research topic in human computer interaction area. This paper defines eye gaze detection by using Discrete Cosine Transform.
Dimililer Kamil   +5 more
doaj   +1 more source

Asymmetric color image encryption and compression based on discrete cosine transform in Fresnel domain

open access: yesResults in Optics, 2020
In this paper, a new asymmetric method is presented to encrypt and compress color images using discrete cosine transform in Fresnel domain. First, the input color image is decomposed into three channels: red, green and blue.
Eakta Kumari   +3 more
doaj   +1 more source

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