One-Time Key Based Phase Scrambling for Phase-Only Correlation between Visually Protected Images

نویسندگان

  • Izumi Ito
  • Hitoshi Kiya
چکیده

We present a theoretical analysis of one-time key based phase scrambling for image matching using phase-only correlation (POC). Phase scrambling is used for visual information protection of templates. The effect of scrambling on POC values is analyzed. As a result, the peak value, which is used as a measure of signal congruence, of the POC between nonscrambled signals can be estimated by observed POC values with key parameters. In addition, we indicate a condition in which the peak value of the POC between non-scrambled signals estimated by observed POC values with one parameter.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

A Theoretical Analysis of One-time Key Based Phase Scrambling for Phase-only Correlation between Visually Protected Images

We present a theoretical analysis of one-time key based phase scrambling for image matching using phase-only correlation (POC). Phase scrambling is used for visual information protection of templates. The effect of scrambling on POC values is analyzed. As a result, the peak value, which is used as a measure of signal congruence, of the POC between nonscrambled signals can be estimated by observ...

متن کامل

Phase Scrambling for Image Matching in the Scrambled Domain

In recent years, signal matching has been required in many fields. A number of matching methods have been developed, and an appropriate method should be selected for each application in order to obtain the desired performance (1)(2). Phase-only correlation (POC), phase correlation or PHAse Transform (PHAT) (3)-(17), which is referred to herein as POC, is a phase-based correlation that is used f...

متن کامل

Evaluation of Phase Locking and Cross Correlation Methods for Estimating the Time Lag between Brain Sites: A Simulation Approach

Introduction: Direction and latency of electrical connectivity between different sites of brain explains brain neural functionality. We compared efficiency of cross correlation and phase locking methods in time lag estimation which are based on local field potential (LFP) and LFPspike signals, respectively. Methods: Signals recorded from MT area of a macaque’s brain was used in a simulation ...

متن کامل

Double image encryption based on random phase encoding in the fractional Fourier domain.

A novel image encryption method is proposed by utilizing random phase encoding in the fractional Fourier domain to encrypt two images into one encrypted image with stationary white distribution. By applying the correct keys which consist of the fractional orders, the random phase masks and the pixel scrambling operator, the two primary images can be recovered without cross-talk. The decryption ...

متن کامل

Single Coil PILS Imaging Using Phase-Scrambling Fourier Transform Technique

Introduction Parallel image reconstruction using local sensitivities (PILS)[1] accelerate MR scan time by using multiple receiver coil in parallel scan time. We propose a novel imaging technique which is based on the PILS, but uses only a single set of signals. The signal obtained in the phase-scrambling Fourier Transform imaging (PSFT)[2] can be transformed into the signal described by the Fre...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:
  • EURASIP J. Information Security

دوره 2009  شماره 

صفحات  -

تاریخ انتشار 2009