WEEK 10 FYP 1

Title: 

Method 2: Masking and Filtering

Objective:

To research and gain information about Masking and Filtering

Content/Result:

• Which can be used on 24 bit per pixel images.

• The technique can be used on both color and gray-scale images. Masking and filtering is similar to placing watermarks on a printed image. 

• There are 2 types 
• Non-detectable e-watermarks
•  e-watermarks of different grade of visibility 

• More robust than LSB insertion with respect to compression, cropping, and some image processing. 

• The carrier medium is modified a suitable way by the information to be the watermark and the colors of the pixels below the mask are modified. 

• The visibility depends upon the amount of modification.

Before Masking and Filtering

After Masking and Filtering

Conclusion:

Masking and filtering can be used on both color and gray-scale images which similar to placing watermarks on a printed image. It is more robust than LSB insertion with respect to compression, cropping, and some image processing.