Can you help me in my questions
first question is:
I know that hide information using Lsb is not robust for image manipulation as cropping and rotating and others,because we replace least significant bit with information bit,ok:why other methods as watermarking and transformation algorithms is more robust for image manipulation so how we implement hiding information by watermarking to be robust against image processing ??

second question is:
If I compress information before hiding into cover ,Do I get large capacity in hiding?

third question is:
how we implement masking and filtering algorithm in hiding information ,is it adds extra information to the original cover or what??

please I trust that you need help me because i know you are obliging

thank you very much for your kindness