CE Image is a pretty amazing plugin that lets you do an extensive amount of image manipulation directly from the plugin tag. Not only can you crop and resize the image, but you can apply water marks, use filters, rotate, flip, reflect images, and a whole lot more.
Here are a couple examples of some of the cool stuff you can do: Want to make your image greyscale? Just add the parameter
filter=“grayscale”. Want rounded corners? Try:
rounded_corners=“all,10”. Turn your image into colorful ASCII art? Why not:
ascii_art=“yes”. I’m barely scratching the surface here.
The possibilities for a plugin like this are myriad. For instance, I could see having a custom field or two in publish form to let authors upload a photo and choose which filter, size, or other parameters. Then, on the template side, you have CE Image take the results from those fields to give you customized photos on a per-entry basis.