You can find the source codes and algorithms proposed by this "Bit Plane Slicing and Quantization-Based Color Image Watermarking in Spatial Domain" study
Repository from Github https://github.com33abrar/Bit-Plane-Slicing-and-Quantization-Based-Color-Image-Watermarking-in-Spatial-DomainRepository from Github https://github.com33abrar/Bit-Plane-Slicing-and-Quantization-Based-Color-Image-Watermarking-in-Spatial-Domain