Luke, you may give a try to SharinPix

This specialized app for salesforce could be used to achieve so like this :

Adding an album to the objects

• Take picture to the camera under Salesforce1 adding image to the album
• Choose this image in the album and the menu command (Add To Rich Text)
• It makes a call to salesforce code (then you can do your magic here)
• it provides an URL for the image to be inserted with the wanted metrics (resolution, width, height, ...)

Coud that help?

Luke, you may give a try to SharinPix - disclaimer, this is my app

This specialized app for salesforce could be used to achieve so like this :

Adding an album to the objects

• Take picture to the camera under Salesforce1 adding image to the album
• Choose this image in the album and the menu command (Add To Rich Text)
• It makes a call to salesforce code (then you can do your magic here)
• it provides an URL for the image to be inserted with the wanted metrics (resolution, width, height, ...)

Coud that help?