how to plot watermark detector response

I need to plot a watermark detector response like the ones in this paper http://www.waset.org/journals/waset/v34/v34-51.pdf

the JPEG quality factor response

and the other ones like the median or guassian response ... how to plot it?

Answer 1

[Image Analyst]

Looks like the plot() command should work. Am I wrong?

[Subhadeep Koley]

The answer is not clear. Can you be more specific ? or can you post the code ?

[Image Analyst]

She asked "I need to plot...". There is a function called plot that does that. Just put in your array representing the "watermark detector response", or whatever other variable you want:

plot(watermarkDetectorResponse, 'b*-', 'LineWidth', 2);

The question was not "How do I compute the watermark detector response?", the question was literally "how to plot it?" which she asked twice so that's what I answered. I assume she already has the response variable because she did not ask how to compute that and only asked how to plot it.