Setting cross origin on images using jrImage_display
Using Jamroom
Pretty sure thats what you want. Its in jrImage 2.0.9 which is in the marketplace now. Update and you can use like this:
{jrCore_module_function function="jrImage_display" module="jrSeminar" type='seminar_image' item_id=201 size="medium" class="img_scale" alt="seminar poster" crop="16:10" crossorigin="allowed"}