research centers


Search results: Found 3

Listing 1 - 3 of 3
Sort by

Article
Color Image Compression and Encryption Based on Compressive Sensing
ضغط وتشفير الصورةالملونة باستخدام الضاغط الحساس

Author: Haraa Raheem Hatem
Journal: Journal of Engineering and Sustainable Development مجلة الهندسة والتنمية المستدامة ISSN: 25200917 Year: 2018 Volume: 22 Issue: 1 Pages: 149-161
Publisher: Al-Mustansyriah University الجامعة المستنصرية

Loading...
Loading...
Abstract

In this paper; a simple and powerful technique is proposed to encrypt and compress the color image in one step based on Compressive Sensing (CS) with using multi-chaotic system (Chen and Chua) as measurement matrix. The CS is used due to many properties; Greatly reduce the ratio of signal sampling, the size of capacity, power unitization, computational complexity that need to represent a sparse signal or images and lead signal processing into a new revolutionary era. In addition to all the above features; it combines encryption and compression in the one step. Also using chaotic system (Chen and Chua) as measurement matrix in CS provides high level of security to the encryption and compression image since each one of chaotic system has Three-dimension variable. The simulation results demonstrate the compression and encryption color image has low storage size and transmitted requirement, high security, large key size and low encryption time requirement since image compression and encryption in the same step, incoherence, key sensitivity, and resistance to brute force attack. Also the recovered image, has good quality (to human perception) and saves both the clarity and the characteristics of the image.


Article
Design and Implementation of Infrared (IR) Communication System

Authors: Suha I. Al-nassar --- Haraa Raheem Hatem --- Jinan N. Shehab
Journal: DIYALA JOURNAL OF ENGINEERING SCIENCES مجلة ديالى للعلوم الهندسية ISSN: 19998716/26166909 Year: 2018 Volume: 11 Issue: 3 Pages: 29-33
Publisher: Diyala University جامعة ديالى

Loading...
Loading...
Abstract

Wireless Infrared (IR) communications system is meant to use free-space propagation of light waves as a transmission medium in near infrared band. In this paper, voice communication system is simulated and implemented by protues software using IR as a source that is established an audio communication (link to transmit and receive voices and music via infrared light). The outcome of this proposed work is to design and implementation an optical wireless system to transmit voice over a certain distance in laboratory. This system has many advantages such as is a common, inexpensive, and the transmitter or receiver can be showed to another location with least distraction.


Article
HIDING (1-8) MULTIMEDIA FILES IN ONE COLOR IMAGE
اخفاء (8-1) ملفات وسائط متعددة في صورة ملونة واحدة

Loading...
Loading...
Abstract

This paper presents hiding one to eight gray images or texts (secret information) inside color image (cover image) based on Least Significant Bits (LSB) algorithm. The main idea is to insert the secret message (one to eight texts or one to eight gray images) in the three LSB of the cover image (color image). The color cover image RGB model (R channel, G channel and B channel) is separated into three cover images (the red cover, green cover, and blue cover). Each one of these three cover images is used to hide secret messages (gray image (two secret images in R channel, three secret images in G channel and three secret images in B channel) or text). The experiments and comparative studies show that the algorithms are characterized by many features of the ability of hiding huge data, and then the ability of extracting secret message without errors. Beside the reconstructed image, has efficacies (to human acquaintance) according to peak signal to noise ratio (PSNR) and mean square error (MSE), also retain both the explicitness and the characteristics of the both secret message and cover image.

يقدم هذا العمل اخفاء من 1 الى 8 صور رمادية او نصوص (تمثل المعلومات السرية) داخل صوره ملونة واحدة (صورة الغلاف) بالاعتماد على البت الاقل وزنا. الفكره الاساسيه في هذا العمل هو ادخال النص او الصورة (من 1 الى 8 نصوص او صور رمادية) في البتات الاقل وزنا في الصورة الملونة الاصلية. الصورة الملونة تقسم الى الالوان الاساسية الثلاثة . كل لون يستخدم لا خفاء صور او نصوص ( اللون الاحمريستخدم لإخفاء نصين او صورتين واللون الاخضر والازرق كل منهما لاخفاء3 نصوص او 3 صور) . لقد بينت التجارب والدراسات ان الخوارزميات المستخدمه تتحدد صفاتها عن طريق قابليتها في اخفاء عدد كبير من البيانات وعن طريق قدرتها في استرجاع الرسالة الأصلية بدون اخطاء. بالإضافة الى ان الصورة المسترجعة تمتلك كفاءات عالية (إلى التعارف البشري) بالاعتماد على نسبة الضوضاء (PSNR) ومعدل مربع الخطأ (MSE)، كما تحتفظ كل من الوضوح وخصائص الرسالة السرية وصورة الغلاف على حد سواء.

Listing 1 - 3 of 3
Sort by
Narrow your search

Resource type

article (3)


Language

English (3)


Year
From To Submit

2018 (2)

2017 (1)