A Reliable and Reversible Image Privacy Protection Based on False Colors

ÇİFTÇİ, Serdar
Akyüz, Ahmet Oğuz
Ebrahimi, Touradj
Protection of visual privacy has become an indispensable component of video surveillance systems due to pervasive use of video cameras for surveillance purposes. In this paper, we propose two fully reversible privacy protection schemes implemented within the JPEG architecture. In both schemes, privacy protection is accomplished by using false colors with the first scheme being adaptable to other privacy protection filters while the second is false color-specific. Both schemes support either a lossless mode in which the original unprotected content can be fully extracted or a lossy mode, which limits file size while still maintaining intelligibility. Our method is not region-of-interest (ROI)-based and can be applied on entire frames without compromising intelligibility. This frees the user from having to define ROIs and improves security as tracking ROIs under dynamic content may fail, exposing sensitive information. Our experimental results indicate the favorability of our method over other commonly used solutions to protect visual privacy.


Using False Colors to Protect Visual Privacy of Sensitive Content
Ciftci, Serdar; Korshunov, Pavel; Akyüz, Ahmet Oğuz; Ebrahimi, Touradj (2015-02-12)
Many privacy protection tools have been proposed for preserving privacy. Tools for protection of visual privacy available today lack either all or some of the important properties that are expected from such tools. Therefore, in this paper, we propose a simple yet effective method for privacy protection based on false color visualization, which maps color palette of an image into a different color palette, possibly after a compressive point transformation of the original pixel data, distorting the details o...
Visual privacy protection using false colors
Çiftçi, Serdar; Akyüz, Ahmet Oğuz; Department of Computer Engineering (2017)
Visual privacy protection (VPP) in video surveillance is an important problem, which is likely to be even more important with the rapid expansion of video surveillance. Although many VPP algorithms exist, none of them simultaneously meets all the desired characteristics of a good privacy protection algorithm. The chief limitation of existing VPP methods is that they require regions of interest (ROI) to be automatically detected or manually marked, both of which are difficult to achieve and prone to errors. I...
A continuous object tracking system with stationary and moving camera modes
Emeksiz, Deniz; Temizel, Alptekin (2012-09-27)
Automatic detection and tracking of objects get more important with the increasing number of surveillance cameras and mobile platforms having cameras. Tracking systems are either designed with stationary camera or designed to work in moving camera. When the camera is stationary, correspondence based tracking with background subtraction has a number of benefits such as enabling automatic detection of new objects in the scene and better tracking accuracy. On the other hand, mean shift is a histogram-based tra...
Optimal data compression for lifetime maximization in wireless sensor networks operating in stealth mode
Incebacak, Davut; Zilan, Ruken; TAVLI, BÜLENT; Barcelo-Ordinas, Jose M.; Garcia-Vidal, Jorge (2015-01-01)
Contextual privacy in Wireless Sensor Networks (WSNs) is concerned with protecting contextual information such as whether, when, and where the data is collected. In this context, hiding the existence of a WSN from adversaries is a desirable feature. One way to mitigate the sensor nodes' detectability is by limiting the transmission power of the nodes (Le., the network is operating in the stealth mode) so that adversaries cannot detect the existence of the WSN unless they are within the sensing range of the ...
An Energy - efficient and reactive remote surveillance framework using wireless multimedia sensor networks
Öztarak, Hakan; Yazıcı, Adnan; Department of Computer Engineering (2011)
With the introduction of Wireless Multimedia Sensor Networks, large-scale remote outdoor surveillance applications where the majority of the cameras will be battery-operated are envisioned. These are the applications where the frequency of incidents is too low to employ permanent staffing such as monitoring of land and marine border, critical infrastructures, bridges, water supplies, etc. Given the inexpensive costs of wireless resource constrained camera sensors, the size of these networks will be signific...
Citation Formats
S. ÇİFTÇİ, A. O. Akyüz, and T. Ebrahimi, “A Reliable and Reversible Image Privacy Protection Based on False Colors,” IEEE TRANSACTIONS ON MULTIMEDIA, pp. 68–81, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/40315.