How to detect forgery in an image without original image

I wanted a method to detect both copy move and image splicing forgery in an image. How to detect if original image is not available with us.

Answer 1

[OCDER]

Are you asking for image forensic analysis tools? I'm not aware of any built-in Matlab tool for this purpose, so you'll have to code this yourself or rely on other published algorithms like this one:

https://github.com/MKLab-ITI/image-forensics/tree/master/matlab_toolbox

Here are some interesting articles to get you started with image forensics.

https://blogs.mathworks.com/steve/2008/05/30/digital-image-forensics/

http://headt.eu/detect-image-manipulations/

[R MH]

Thank you so much for your valuable suggestions. Actually I have code which detect forgery in an image if original image is provided but in some situations original image doesn't exist at that time how to identify given image is original or forged. Please send me the resources which help me to get the solution. Once again thank you so much for your response.

[OCDER]

The mathwork's blog points to Hany Farid's many projects on image forensic analysis. See if one of his papers discuss the algorithm you are looking for. https://www.cs.dartmouth.edu/farid/

The ieee website also might have a paper for the algorithm you want, like this one : https://ieeexplore.ieee.org/document/6968386/

Or other blogs with non-paywalled papers: http://www.ee.columbia.edu/ln/dvmm/trustfoto/projs/splicing/splicing.htm

[Subham Tulshan]

I think this can be done by using CNN(Deep Learning).

and also it is possible if you have the hash of the original image

[R MH]

Thank you so much sir for your suggestions. If possible can you please send me code reference links.