An Edge-guided Reversible Data Hiding Scheme for High Dynamic Range Images



Abstract

In this work, a reversible data hiding (RDH) algorithm is proposed for high dynamic range (HDR) images containing an additional luminance channel. Since prediction accuracy is the key of RDH, we propose to embed data into HDR images by exploiting the edge information among the luminance channel and color channels to achieve accurate prediction and high embeding capacity. Besides, a new edge-directed order is proposed to reduce the visual loss of the stego image. Various experimental results demonstrate that the proposed algorithm can hide more data into HDR images with less distortion than directly applying traditional RDH methods designed for low dynamic range (LDR) images. Compared to the current HDR hiding algorithms, the proposed method is not only reversible, but also achieves a tradeoff between embedding capacity and distortion.

Code available soon

Publication:

Wei Zhang et al. An Edge-guided Reversible Data Hiding Scheme for High Dynamic Range Images. submitted.

Patent:

"高动态多曝光图像融合软件" 发明人：张伟 等 软件著作权 (登记号：2014SR113413)

Framework of data hiding scheme

Result & Comparison:

Comparison results using different edge information:


(a)Sunset


(b)Rooftops


(c)Rosette


(d)Memorial


(e)Aspen


(f)Desk


(g)Cathedral


(h)Church


The MSE versus the capacity curves:


(a)Sunset


(b)Rooftops


(c)Rosette


(d)Memorial


(e)Aspen


(f)Desk


(g)Catherial


(h)Church



Visual comparisons of the tone-mapped HDR images:

(a)

(b)

(c)

'Sunset': (a) cover HDR image, (b) stego HDR image (PSNR = 44.68 dB) with capacity 2.0 bpp, (c) difference image.


(a)

(b)

(c)

'Rooftops': (a) cover HDR image, (b) stego HDR image (PSNR = 34.64 dB) with capacity 2.5 bpp, (c) difference image.


(a)

(b)

(c)

'Rosette': (a) cover HDR image, (b) stego HDR image (PSNR = 39.36 dB) with capacity 2.2 bpp, (c) difference image.


(a)

(b)

(c)

'Memorial': (a) cover HDR image, (b) stego HDR image (PSNR = 29.66 dB) with capacity 2.12 bpp, (c) difference image.


(a)

(b)

(c)

'Aspen': (a) cover HDR image, (b) stego HDR image (PSNR = 33.66 dB) with capacity 2.1 bpp, (c) difference image.


(a)

(b)

(c)

'Desk': (a) cover HDR image, (b) stego HDR image (PSNR = 35.96 dB) with capacity 2.3 bpp, (c) difference image.


(a)

(b)

(c)

'Cathedral': (a) cover HDR image, (b) stego HDR image (PSNR = 32.04 dB) with capacity 2.28 bpp, (c) difference image.


(a)

(b)

(c)

'Church': (a) cover HDR image, (b) stego HDR image with (PSNR = 36.40 dB) capacity 2.5 bpp, (c) difference image.



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