>>/5581/
> But because my English is very poor
> Please don't be offended by the reply
No worries my English is poor too.

> Small size differences can bypass detection
Yes. In fact if you download an image and re-upload it, it will differ sufficiently and will bypass too.
The file has to be identical.


> About  >>/5576/
> The test is also size or graffiti
> Not a completely different picture
> It shouldn't be a mistake
Hmm. Not sure what you mean.