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Old 04-26-2015, 03:58 PM   #1
Sanpreet Singh
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Registered: Jan 2013
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Scrambling and descrambling of an image using chaotic map


Hello everyone.My question is - I want to make my image unreadable while transmitting it, using chaotic map(arnold cat map, logistic maps, bakers map or henon map.To know more about chaotic map one can visit the site http://en.wikipedia.org/wiki/List_of_chaotic_maps.
#I donot know how to do scrambling and descrambling of my image. In simple words to encrypt it and then decrypt it using chaotic maps.
#I know logic behind this - Key will be used to make our original image into unreadable image and same key is used to decode it. I donot know how to encode and decode it. I need to make key using chaotic map.
#If anyone can help me to make a code to do scrambling and descrambling of input image with the help of chaotic map, It would be a great help.
 
Old 04-26-2015, 08:33 PM   #2
John VV
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a bit off topic but
why not just use a rar ,or 7z or zip and have the archive manager put a password or encrypt it or scramble it

all that is built in to the desktop archive manager
 
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Old 04-30-2015, 02:32 AM   #3
Sanpreet Singh
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Registered: Jan 2013
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Hello, I have done with scrambling. Now I want to crop my image. If we want to do cropping of the image using coding we have to do this as follows
I = imcrop(I,[xmin ymin width height]), %I know the width and height of image, but I donot know how to find xmin and ymin cordinates of an image from the different pixels values of an image.
 
  


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