Tamper detection and image recovery for BTC-compressed images
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To ensure the integrity of images compressed using block truncation coding (BTC), a tamper detection and image recovery scheme is proposed in this paper. In this scheme, the size of the authentication data can be adaptively selected according to the user’s requirement. The authentication data is embedded in the value differences of the quantization levels in each BTC-compressed image block. Multiple copies of the recovery data are embedded into the bit maps of the smooth blocks. Experimental results show that the proposed scheme performs well in terms of detection precision and the embedded image quality. Meanwhile, the tampered areas can be roughly recovered by using the proposed scheme.
KeywordsTamper detection Image recovery Block truncation coding Image authentication Fragile watermarking
This research was supported by Providence University, Taichung, Taiwan under contract the National Science Council, Taipei, R.O.C. under contract MOST 103-2410-H-126-009-MY3 and MOST-103-2632-E-126-001MY3.
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