In this paper,we proposed an attack-resistant lossless recovery visible watermarking algorithm which embeds colour watermark into source colour image.The algorithm embeds three components of watermarking image RGB into the corresponding colour components of the host images by modulation.In order to achieve lossless recovery,it takes the quantisation errors generated in embedding process as the recov-ery data,and embedded around the watermarking region based on the difference expansion lossless watermarking technology.All embedding processes are controlled by a secret key in order to increase the security of the watermarking.Simulation experiments show that the watermark transparency of the algorithm can modulate smoothly,the legal users can achieve lossless and reversible recovery,and for illegal users the al-gorithm has strong attack-resistance property.%提出一种将彩色水印嵌入源彩色图像中的抗攻击无损恢复可见水印算法。算法将水印图像的 RGB 三分量通过调制嵌入到宿主图像的对应色彩分量中。为了实现无损恢复，将嵌入过程中产生的量化误差作为恢复数据，基于差值扩展无损水印技术嵌入水印区域及其周围。为了增加水印的安全性，嵌入过程由秘钥控制。仿真实验表明，该算法水印透明性可进行平滑调整，合法用户能够实现无损可逆恢复，而且对非法用户具有很强的抗攻击特性。
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