Generative AI and Children’s Illustration: How Fabolia’s Technology Works

Generative artificial intelligence has revolutionized image creation. But how does this technology specifically apply to children's books? At Fabolia, we use the most advanced AI models to generate personalized illustrations, faithful to the photos provided and suited to the world of childhood.

In this article, we reveal the technology that transforms a simple photo into an illustrated character, and a theme into 13 pages of illustrated adventure.

Generative AI is a branch of artificial intelligence capable of creating new content: text, images, music, video. Unlike traditional programs that follow predefined rules, generative AI has learned from millions of examples and can produce original creations.

For images, the best-known model is GPT-Image (developed by OpenAI). Fabolia uses the latest version of this model to generate book illustrations. Each image is created from a highly detailed text prompt describing the scene, characters, style, and mood.

The result is not a simple combination of existing images: it’s an original creation, unique in the world. Even with the same parameters, the AI will never generate exactly the same illustration twice.

Creating faithful avatars is Fabolia’s most complex technical challenge. Here’s how it works:

Photo analysis: the AI analyzes the uploaded photo to identify distinctive facial features (face shape, eye and hair color, unique traits).

Avatar generation: a detailed prompt is built, combining detected physical traits with the chosen illustration style. The AI then generates an avatar that resembles the subject while respecting the artistic style.

Consistency across pages: a major challenge is maintaining visual consistency of the character throughout the book’s 13 pages. Fabolia uses an avatar reference system to ensure the character remains recognizable from page to page.

For doudous and objects, the process is similar but adapted. The AI considers shape, color, texture, and distinctive details of the plush or object to create a coherent character.

Creating a Fabolia book involves several steps, each using a different AI model:

1. Story generation: a language model (GPT-4.1) writes an original story based on the characters, theme, message, and style chosen. The story is structured into 13 pages with a complete narrative arc.

2. Avatar creation: from photos, the AI generates avatars in the chosen style. These avatars serve as references for all illustrations.

3. Scene illustration: for each page, a detailed prompt is built. It combines the page text, scene description, characters, and style. The AI then generates a unique illustration.

4. Cover: a special cover illustration is generated, featuring the main characters in a dynamic pose.

5. Assembly: text and illustrations are laid out via Google Slides, then exported as a high-quality PDF.

Each book represents about 15,000 words of AI prompts and involves several models working in parallel.

Children's illustration is a field where generative AI excels for several reasons:

Exaggerated expressions: children love expressive characters. AI is very good at generating joyful, surprised, or brave faces.

Bright colors: AI models naturally produce images with saturated and harmonious colors, perfect for young audiences.

Variety of settings: AI can create detailed fantastic worlds in seconds, where a human illustrator would take hours.

Large-scale personalization: each book is unique, which would be impossible to do manually at an affordable price.

Of course, AI is not perfect. That's why Fabolia includes a proofreading step where parents can adjust the text, and a regeneration system for illustrations that don't fit. Discover the full process on our how-it-works page.

At Fabolia, we focus on three fundamental aspects:

Illustration quality: each style is calibrated with specific prompts ensuring a child-appropriate result. Images are generated in high resolution for flawless print quality.

Data security: uploaded photos are used only to generate avatars, then deleted from our servers within 24 hours. They are never used to train AI models.

Appropriate content: all texts and images pass through content filters to guarantee a 100% child-appropriate result. Stories convey positive values: courage, friendship, sharing, perseverance.

Fabolia is a French company compliant with GDPR and all European data protection regulations. Learn more on our about page.

Generative AI technology is evolving at a dizzying pace. Here's what the future holds for illustrated books:

Perfect consistency: upcoming models will offer even better visual consistency between pages, with characters always identical from scene to scene.

Animation: imagine a book whose illustrations animate when viewed on a tablet. The technology already exists and will soon be integrated.

Interactivity: children will soon be able to modify the story during reading, with illustrations generated in real time.

Voice: AI-generated narrations will read the story aloud, with different voices for each character.

Fabolia is at the forefront of this revolution and continues improving its illustration pipeline to offer the best possible experience.

Generative AI isn’t here to replace imagination: it brings it to life. At Fabolia, we put this cutting-edge technology at families’ service to create unique, precious memories. Each book is a technical feat, but above all, a love story brought to life. See the results for yourself by creating your book on Fabolia!