how to detect and extract the watermark in image

Question

iqra toheed 2018-8-27

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/416420-how-to-detect-and-extract-the-watermark-in-image

回答： Image Analyst 2018-8-27

i have three queries related to this image:

1- This image has a embedded watermark on the right side of the picture of the founder written as 1000. But if the image is converted into gray scale that thousand is visible. after that when i convert it into binary and try to extract the features i was not able to extract this as a feature.

2- Moreover, the dotted line labeled 1000 on the left side of the image of the man also need to be extracted and i am not able to extract it.

3- the third thing is that i want to extract this picture of man, picture of flag, the 1000 and the serial number of the currency notes, each one as a single feature. when i extract them using otsu method the moon and star of the flag are detected as separate features.

4- and also how to detect the texture of the currency note.