Opencart is a unique module to prevent the images you use on your site from being taken by competitors.
The watermark module integrates the logo, icon or text you add from the admin with the image by printing it like a stamp on all product images. In this way, even if the images are taken by others, they will not be able to be used as they will have a sign belonging to your site.
Additionally, the added sign can be added or changed from the module's management screen. Settings such as location, size, dimness, etc. can be managed.