Do you have any idea what happened to the image? For example, why is it named, "part0.jpg"? I know of no digital camera that ever used a file name like that.
FWIW, the problems in this image look like what is called classical "JPG bit rot artifacts". This typically happens when some storage medium (eg, hard drive) has developed bad areas, or the connection to the storage medium was broken, or the source turned off during a data transfer.
However, I should ask if by any chance this effect might possibly have been intentional? For example, did someone go crazy and apply a bunch of Instagram filters, or was this a situation in which "it just happened" and you don't know what went on.
If there is any way you can get the original of this image, it will look vastly better than trying to fix a problem like this after the fact, and won't be making our members work needlessly to try to reconstruct something (the large areas of green background) that already exists. For example, if you have access to the camera that took this photo, there is a good chance that the original (ie, uncorrupted version) version is still on it.
Attached is an example of what someone might be able to achieve in Photoshop without an extraordinary amount of work.
Tom M
PS - Oh, and BTW, I forgot to mention: Welcome to PSG!
PPS - For an explanation and examples of bit rot artifacts, have a look at
http://openpreservation.org/system/files/Bit Rot_OPF_0.pdf. Examples start on page 5 of the PDF.
