Saving images after altering them by CamanJS plugin

[gulfursormurl]

So I have some images and I could sucessfuly apply effects to them by using the CamanJS plugin. But now I want to save these altered images and replace them with the original one.The documentation (link) Provides information on saving images. but it is seen as a download prompt. I want the images to be saved at the server without a prompt and on the click of the "save" button. The documentation also says something about base64 encoding which I dont understand. Could my problem be solved?thanks!.