Sometimes a little tongue-in-cheek humor goes a long way to breaking down barriers. In this case, The Coca-Cola Company decided that making a joke of its promotional items might give a more lighthearted feel to a publicity event for its Sprite brand. They came up with several ideas for blatant and humorous promotional items to play with. The team at RoboFun was tasked with creating a camera that would overlay the Sprite logo as a watermark on each image.
Here you can see the final product. Even before you power it on and snap a picture, the blatant advertising is in your face. From the green body to the completely non-functional flash serving only to hold the logo. When a picture is snapped, the internal Raspberry Pi adds the watermark and saves it to storage for later retrieval.
The RoboFun.ro crew were nice enough to share a complete hardware breakdown of how they built it. As the brains, they are using a Raspberry Pi model B. This is powered by an off-the-shelf battery pack so they didn't have to deal with Li-Po charging circuits or protection. Also crammed into the camera is a small speaker and amplifier. For image capture, they're using a 5-megapixel Raspberry Pi camera accessory. RoboFun managed to cram this all in with plenty of space to spare, as you can see in the picture below.
While we can all appreciate the humor in the obnoxious watermark, the folks at RoboFun have decided to share the python code responsible for this part so that anyone who gets his or her hands on one can remove that feature.