Results 21 to 30 of about 1,495,143 (296)

Comparison of Image Compressions: Analog Transformations

open access: yesProceedings, 2020
A comparison between the four most used transforms, the discrete Fourier transform (DFT), discrete cosine transform (DCT), the Walsh–Hadamard transform (WHT) and the Haar-wavelet transform (DWT), for the transmission of analog images, varying their ...
Jose Balsa
doaj   +1 more source

Multi-Resolution Discrete Cosine Transform Fusion Technique Face Recognition Model

open access: yesData, 2022
This work presents a Multi-Resolution Discrete Cosine Transform (MDCT) fusion technique Fusion Feature-Level Face Recognition Model (FFLFRM) comprising face detection, feature extraction, feature fusion, and face classification.
Bader M. AlFawwaz   +3 more
doaj   +1 more source

DEEP GENERATIVE DISCRETE COSINE TRANSFORM FOR SPECTRAL IMAGE PROCESSING

open access: yesICTACT Journal on Image and Video Processing, 2022
The ever-increasing number of publications and applications in the field of cross-spectral image processing has led to the area receiving greater focus than it previously had.
Mary Florida   +4 more
doaj   +1 more source

Image Compression Based on a Partially Rotated Discrete Cosine Transform With a Principal Orientation

open access: yesIEEE Access, 2021
Image transforms are necessary for image and video compression. Analytic transforms are powerful in compacting natural signals for wider exploitation. Various methods have been introduced to represent such data as a small number of bases, and several of ...
Gihwan Lee, Yoonsik Choe
doaj   +1 more source

A New Zero-Watermarking Algorithm Resisting Attacks Based on Differences Hashing

open access: yesCybernetics and Information Technologies, 2016
Medical volume data containing patient information is often faced with various attacks in the transmission process. In order to enhance the medical information system security, and effectively solve the problem of medical volume data protection, a new ...
Han Baoru, Li Jingbing
doaj   +1 more source

Two-dimensional DCT/IDCT architecture [PDF]

open access: yes, 2003
A fully parallel architecture for the computation of a two-dimensional (2-D) discrete cosine transform (DCT), based on row-column decomposition is presented.
Jollah, I, Aggoun, A
core   +1 more source

A Discrete Fourier-Cosine Transform Chip [PDF]

open access: yesIEEE Journal on Selected Areas in Communications, 1986
An 8-point Fourier-cosine transform chip designed for a data rate of 100 Mbits/s is described. The top-down design is presented step by step, including algorithm modification for VLSI suitability, architectural choices, testing overhead, internal precision assignments, mask generation, and finally, verification of the layout.
Martin Vetterli, Adriaan Ligtenberg
openaire   +1 more source

DISCRETE COSINE TRANSFORM UNTUK IDENTIFIKASI CITRA HYLOCEREUS COSTARICENSIS

open access: yesSimetris: Jurnal Teknik Mesin, Elektro dan Ilmu Komputer, 2015
ABSTRAK Pengolahan citra digital memiliki peranan sangat luas terhadap kehidupan sehari- hari. Salah satunya dapat digunakan untuk mengidentifikasi citra buah untuk mengetahui tingkat kematangan buah tersebut.
Resty Wulanningrum   +1 more
doaj   +1 more source

METHOD OF REFERENCE SIGNALS CREATING IN NON-DESTRUCTIVE TESTING BASED ON LOW-SPEED IMPACT

open access: yesТехнічна електродинаміка, 2021
The article describes the approach to the formation of a simulation model of information signals, which are typical for objects with different types of defects.
В.С. Еременко   +2 more
doaj   +1 more source

Pengamanan Pesan pada Steganografi Citra dengan Teknik Penyisipan Spread Spectrum

open access: yesJurnal Elkomika, 2019
ABSTRAK Pada studi ini, dilakukan penggabungan metode - metode untuk memperkuat dan meningkatkan sisi keamanan proses pertukaran informasi atau pesan digital.
SOFIA SAIDAH   +2 more
doaj   +1 more source

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