关键词: 数据隐藏, 块截短编码, 视觉感知, 隐藏容量

Abstract: Some existing BTC-based data hiding algorithms do not fully exploit visual perception of the host images，and cannot obtain high hiding capacity and visual quality of stego-images.To solve this issue，an image adaptive data hiding scheme in BTC domain is proposed by utilizing the visual perception characteristics in BTC domain.A visual perception factor is computed by employing luminance and texture characteristics in BTC domain.Secret message bits are adaptively embedded into the bitmap in BTC domain.Experimental results show that proposed algorithm can achieve a good balance between hiding capacity and stego-image quality.On the average，when compared with previous BTC-based steganographic scheme，this scheme has about 1.4 dB higher PSNR value under the same hiding capacity.

Key words: data hiding, block truncation coding, visual perception, hiding capacity