Abstract: The concept of multi-bits watermark is definite in this paper.The implementation of multi-bits watermark based
on multi-symbols coding are proposed using the characteristic non-interaction between irrelevant markers in embedding watermark
spatial.Method I implements spatial multiplexing multi-bit watermark embedding by spatial segmenting.Spatial domain
watermark algorithm based on toral automorphism and Hadamard transforms is used to deal with single tag field.Method II
uses frequency watermark algorithms based on DCT transform after spatial segmenting.Method III embedded multi-bit watermark
into image of the third layer wavelet decomposition coefficients by not intersect through the division into an independent
embedded space.The experiments show that above methods satisfy general multi-bits watermark application requirements.