GenPiCam - Generative AI Camera

GenPiCam - Generative AI Camera

Generative AI (GenAI) is a type of Artificial Intelligence that can create a wide variety of images, video and text. To accelerate the robot uprising I chained two GenAI models together to build a camera which describes the current scene in words, and then uses a second model to create a new generated stylised image. Let me introduce GenPiCam — a RaspberryPi based camera that reimagines the world with GenAI.

Before and after images created by GenPiCamBefore and after images created by GenPiCam

The heavy processing and true smarts of this project is handled by Midjourney — an external service using machine learning-based image generators. GenPiCam makes use of two Midjourney capabilities

Between these two steps I allow of a level of creative input, so the GenPiCam camera has a dial to tweak the style of the final image. This essentially becomes a filter, adding an “anime”, “pop-art” or “futuristic” influence to the generated image.

I’m bored — can I get a video?

Sure — here’s the 2 minute summary

The “photographic” process

The initial photo image is taken with a Raspberry Pi Camera Module. An external camera shutter (pushbutton connected to the Raspberry Pi GPIO pins) when pushed takes a still image and saves the photo as a jpeg image.

Taking still images of wildlife in the gardenTaking still images of wildlife in the garden

The photo is uploaded to Midjourney which starts with an existing photo and creates a text description prompts for the image. For the curious, I’m using some very inelegant bot interactions with PyAutoGUI to control the mouse and keyboard (as there’s no API) — let this be an example of code you should never write.

Midjourney’s describe tool takes an image as input, then generates text prompts. This is a pretty clever service, reversing the usual process of “text to image” by doing the reverse, starting with the photo and then extracting text to describe the essence of the image. Here is Snowy, but Midjouney has a much more expressive description.

Snowy the cat — laying on bed under yellow blanket …Snowy the cat — laying on bed under yellow blanket …

black cat laying on bed under yellow blanket, in the style of berrypunk, irridescent, glimmering, unpolished, symmetrical, rounded, chinapunk — ar 4:3

The describe function actually returns four descriptions based on the image, but GenPiCam arbitrarily selects the first description.

Now for the fun part. We can take that text prompt, and use it to create a brand new image with Generative AI with a new call to Midjouney imagine. Here is a image generate from the previous text prompt.

Midjouney imagine generated image from text prompt *Midjouney imagine generated image from text prompt *

GenPiCam has a selection switch to update the prompt with stylistic instructions.

Scene selectorScene selector

This is a 12 way rotary switch connected to the Raspberry Pi GPIO pins. By reading the current “artistic selection” GenPiCam will add a prefix such as “retro pop art-style illustration” to the text prompt. A few of the other style prompts include

Let’s see the before and after “pop-art” images for Snowy.

Final image with before and after photos along with text prompt *Final image with before and after photos along with text prompt *

The final image is a created using the Pillow Python imaging library, and is comprised of

Here’s the same process, but adding the text **“Hyper Realistic, whimsical with colourful hat and balloons”. **

Even though the image on the right is a creation from Generative AI, there’s still still a sense of disappointment coming through Snowy’s judgmental eyes.

Generative AI Images — Learnings

I had so much fun building the GenPiCam camera — and this was an interesting path for exploring prompt engineering for Generative AI. The better photos were the ones which had a simple composition — essentially images that were easy to put words to. For example, this scene is easy to describe with a colour and definitive objects.

A green stuffed animal and white keyboardA green stuffed animal and white keyboard

However, there were some very strange results while describing more unique scenes. I found the description of a classic Australian cloths line created a unusual image.

Australian cloths lineAustralian cloths line

One of my favourite reimagined images was the identification of my laser mouse. It turns out a laser mouse has multiple meaning leading to a striking result.

Laser mouseLaser mouse

The hardware

The least stylish part of GenPiCam is the hardware which I hastily assembled. If you want to build your own reality distorting camera, you’ll need the following.

The inner workings of GenPiCamThe inner workings of GenPiCam

It isn’t the most beautiful of builds — but I’ll just excuse this as being highly functional

Boot image for GenPiCam cameraBoot image for GenPiCam camera

Summary, code & credits

The GenPiCam has been a fun way to explore Generative AI, transforming photos into stylised (and sometime surprising) images.

Photo of author on the left — and a stylised version of Simon on the rightPhoto of author on the left — and a stylised version of Simon on the right