How Does AI Image Detection Work?
AI image detection uses deep learning models trained to recognize the specific visual artifacts that generative AI systems leave behind. Diffusion models like Stable Diffusion and DALL-E produce images with characteristic high-frequency texture patterns that differ from camera sensor noise. GAN-based generators like StyleGAN2 produce synthetic facial features with characteristic eye reflection asymmetry and irregular hair-edge transitions. AIGeneratedIt's XceptionNet classifier is trained on the FaceForensics++ and DFDC datasets, supplemented by in-house synthetic images from all major generation tools.
The second detection layer uses Noise Pattern Recognition (NPR) to analyze the stochastic noise residual left after removing the low-frequency content of an image. Real camera images contain sensor noise patterns determined by the physical CCD or CMOS sensor. AI-generated images lack this pattern entirely or contain a synthetic noise signature specific to the generator architecture. NPR analysis is particularly effective for detecting images that have been post-processed to remove GAN artifacts.
Additionally, AIGeneratedIt performs EXIF metadata forensics to check for missing or inconsistent camera data. Real photographs embed camera model, lens parameters, GPS coordinates, and timestamp data. AI generators either strip EXIF entirely or inject plausible-but-inconsistent metadata. Combined with Error Level Analysis (ELA) and C2PA content credential verification, this multi-layer approach achieves 95% accuracy across all tested AI image generators.
Frequently Asked Questions
What AI image generators does this detect?
AIGeneratedIt detects images from Midjourney (all versions), DALL-E 2 and 3, Stable Diffusion (1.5, XL, 3.0), Flux.1, Adobe Firefly, Ideogram, Playground AI, Leonardo AI, NightCafe, StyleGAN2, BigGAN, and 30+ additional generators. New generators are added within two weeks of public release.
Can it detect faces that have been AI-enhanced or beauty-filtered?
Yes. AIGeneratedIt detects not only fully AI-generated faces but also partially manipulated faces including AI skin smoothing, eye enhancement, and face-swap composites. The heatmap clearly shows which facial regions were modified, making it useful for social media verification and journalistic fact-checking.
What does the pixel-level heatmap show?
The heatmap uses Gradient-weighted Class Activation Mapping (Grad-CAM) to highlight the specific regions of an image that most strongly contributed to the AI detection verdict. Red regions indicate high AI-probability areas such as synthesized textures or GAN artifacts. This is invaluable for understanding which parts of a composite image are authentic versus generated.
How does EXIF metadata checking help detect AI images?
Genuine photographs record camera model, aperture, shutter speed, ISO, GPS data, and creation timestamp in their EXIF metadata. AI generators typically strip this data entirely or generate implausible values — for example, reporting a camera model that did not exist on the date shown in the timestamp. AIGeneratedIt flags missing, stripped, or inconsistent EXIF as a contributing factor in its final verdict.
Is the image stored after scanning?
Images are stored in encrypted Cloudflare R2 storage only for the duration needed to generate the forensic report. All images are permanently deleted within 24 hours. We never use submitted images to train, test, or improve our detection models.
AI Image Generators This Detector Covers
Our detection models are trained on images from the following AI generation platforms and architectures:
- Midjourney — v3, v4, v5, v5.2, v6, Niji
- OpenAI DALL-E — DALL-E 2, DALL-E 3, DALL-E 3 HD
- Stable Diffusion — 1.4, 1.5, 2.0, XL, SDXL-Turbo, Stable Diffusion 3
- Flux.1 — Flux.1 Dev, Flux.1 Schnell, Flux.1 Pro (Black Forest Labs)
- Adobe Firefly — Firefly 1, Firefly 2, Firefly 3
- Ideogram — v1, v2
- GAN-based — StyleGAN2, StyleGAN3, BigGAN, ProGAN, PGGAN
- Leonardo AI — all models including Alchemy
- Playground AI — Playground v2.5
- Bing Image Creator — powered by DALL-E 3