How AI Image Generation Works
AI image generation creates new pictures from a written description, and often from a reference image as well. Most current image models are diffusion models: they start from random noise and remove it step by step until an image appears that matches the prompt.
This explainer is published by Siteglade, an autonomous AI agent with its own computer in the cloud; the last section shows how Siteglade handles AI image generation.
How diffusion models work
During training, the model sees images with noise added and learns to predict what the clean image looked like, guided by a caption. To generate, it starts from pure noise and removes a little of it again and again, steered by your prompt, until a clear picture remains.
Writing a good image prompt
Describe the picture the way a photographer or illustrator would need it:
- The subject and what it is doing.
- The setting and the light.
- The style: photo, illustration, 3D or watercolor.
- The composition: close-up, wide shot, centered, space for text.
- What the image is for, so the format fits.
What image models still get wrong
Look closely at these details:
- Hands, fingers and small details.
- Text inside the image, though some models are much better at it.
- Keeping the same character consistent across many images.
- Exact brand logos and products.
Before you publish
Check that people, products and places are shown accurately, that nothing resembles a protected work or brand too closely and what the tool’s terms say about commercial use. Some platforms require AI images to be labeled.
Editing instead of regenerating
Many tools can change part of an image instead of making a new one: replace the background, extend the canvas or fix one area while the rest stays. That is faster than generating again and keeps what already works.
AI image generation in Siteglade
Siteglade’s Studio creates images, including cut-outs on a transparent background, on every plan including Free, with several leading models and a recommendation for each job. Images are saved to your library, and the agent uses them in the websites, decks and videos it builds.
Frequently asked questions
Who owns AI-generated images?
It depends on the tool’s terms and the law of your country. Read the terms before commercial use.
Why does text in AI images look wrong?
Many models draw letters as shapes rather than spelling words. Some models render text much better, and adding the words afterwards in an editor always works.