Artificial Intelligence has made remarkable progress in recent years, with advanced Generative AI models capable of performing tasks that seem almost magical, especially for non-techies. From intelligent chatbots that converse like humans to tools that generate images based on text inputs, the progress in generative AI has amazed us all. In this article, we will explore the Stable Diffusion generative model by building a logo generator app as an example.

Understanding Stable Diffusion

Stable diffusion is a text-to-image generative model that creates photorealistic images from text inputs. It can produce accurate results as it is pre-trained on extensive datasets of text-image pairs. The model merges the power of diffusion-based generative models and natural language processing to capture intricate relationships between textual and visual data. Technically,

• It is a latent text-to-image diffusion model.
• It creates images by iteratively applying a stochastic diffusion to a noise vector.

The best aspect of Stable diffusion is that it is open-source, and its code is publicly accessible for anyone to use, modify and distribute without restriction. So, if you plan to use text-to-image features in your product, Stable diffusion can be a cost-effective alternative compared to Dalle-2 from OpenAI.

The requirement

Generating images from text inputs sounds exciting, right? You can think of numerous use cases and applications for this model. Let’s build an application, say, a logo generator app. In the process, we’ll understand how the model works. The requirements for the app are;

• Users should provide text input for how they want the logo to appear.
• The app will return a logo image as output. The image has to be as defined in the input prompt.

We need to select a text-to-image generative model to meet the above requirements. Stable Diffusion is our choice. First, to comprehend how it works, let’s get acquainted with diffusion and diffusion models.

What is a Diffusion Model?

In physics, diffusion is the process of particles spreading from a high-concentration area to a low-concentration area by random motion. Diffusion models are generative models that work similarly to the diffusion process. The model starts diffusion with a noisy input signal and then gradually refines the noise over time to generate the output signal.

There are many diffusion models available in the market, designed to perform different tasks, such as restoring degraded images, smoothening images, etc. The table below lists some diffusion models and their tasks. Since our requirement is to build a logo generator app, we can choose the Latent Diffusion model that can perform image generation tasks.

Latent Diffusion Model

Stable Diffusion is a latent text-to-image diffusion model. The model has 3 three main components. Each component has its own neural network. The first component, ClipText is the text encoder. It is used for encoding the input text. For example, if a user inputs a prompt “create a logo with a red circle and a lion in the center.” ClipText will encode this prompt and feed it to the next component, which deals with image generation.