Most image types have a specific format. If you insert bogus bytes into the format, it likely won't be recognized anymore. Your question is akin to "I smashed my cell phone, why doesn't it make calls anymore?". :icon_rolleyes:
Narue
Bad Cop
15,460 posts since Sep 2004
Reputation Points: 6,464
Solved Threads: 1,401
Question arises why you want to do this???? when we add some thing to our image and change its extension the change occures in the bit sequence of the image (i.e. 1s and 0's) not only in display and when you erase the text and again change its extension it also makes change in bit sequence and not in display only..... and when computer processes that bit sequence into image the result is not your desired one
abelLazm
Postaholic
2,113 posts since Feb 2011
Reputation Points: 219
Solved Threads: 124