📚 Image Analysis Series
Episode 1: Can Human Body Be Explained by Numbers?
Episode 2 (Main Post): SNS Controversy — “Why Do I Look So Short?”
Episode 2 (Supplement): Can AI Accurately Estimate Height? Possibilities and Challenges
Episode 3: (Current Post)
AI Body Analysis ③: The Perfect Body? AI Says Otherwise
📌 About This Series
Using AI-powered image analysis tools, we examine full-body portraits of various figures.
Through detailed proportion measurements, we reveal strengths and weaknesses that are not obvious to the naked eye.
📍 Featured Subject: Hayul Jeong (179.5cm)
Debuting as a supermodel in the early 2010s, Hayul Jeong has worked in the industry for over a decade.
With an official profile height of 179.5cm, she is recognized as one of the tallest models in her field.
① Full-body profile of Hayul Jeong |
② TV feature showcasing her modeling profile |
Her physique appeared flawless at first glance. Her SNS was filled with confident full-body snapshots.
But AI analysis of her profile height and image coordinates revealed that her arm length, leg-to-body ratio, and pelvis positioning were “structurally unbalanced.”
Here are some key figures where she scored significantly lower than other models:
- Upper-to-lower body ratio: 0.896
- Inseam-to-height ratio: 47.25
- Belly-button-to-leg ratio: 59.77
- Leg length (navel to foot): 107.28cm
① High facial similarity but subtle distortion in body ratio |
② Lower face accuracy but greater distortion in lower body |
Simply being tall doesn't guarantee good proportions.
In Hayul's case, comparison with other models made her weaknesses even more noticeable.
📏 Revealed Through Comparison
These are all tall models, standing around 180cm. But AI doesn't just judge height—it evaluates details like leg length, pelvis height, and upper body ratio based on visual coordinates.
Take Jihyun Kang, for example.
Her profile height matches Hayul’s at 180cm,
but AI estimated her real height at 183.3cm.
Her belly-button-to-leg ratio was 64.1, and leg length was 117.5cm— nearly 13cm longer than Hayul in leg dimension alone.
Seorin Lee is similar.
Her official profile also states 179.5cm,
but AI estimated her at 181.3cm—not just taller, but better balanced in pelvic and leg ratios.
The image below is a conceptual shoot where Hayul and Seorin appear together. Despite wearing similar outfits and posing similarly, they leave very different impressions due to differences in pelvis height, leg length, and lower-body proportions.
Though Hayul and Seorin share the same profile height and are close friends, the overall impression is that Hayul appears “shorter and less balanced.”
This is the crux of what AI highlights as a “distorted body impression.”
🔍 AI Reveals the Truth Behind the Proportions
For over a decade, Hayul Jeong has used outfits, poses, hairstyles, and camera angles to artfully conceal her proportional weaknesses.
However, recent AI image analysis proves that “You can trick the camera, but not the coordinates.”
Among the many stylish photos she shared on SNS, some unintentionally exposed her natural body proportions, and AI was quick to catch those subtle differences.
We now live in an era where proportions and impressions matter more than height or weight.
AI is providing objective evidence—through numbers, coordinates, and imagery.
🧭 Coming Next
In the next episode, Kang Ji-hyun and the Lee Seorin-based character take center stage.
Their profile heights are 181.5cm and 179.5cm respectively.
However, the AI analysis revealed completely different results.
How did AI distinguish between the two?
Find out in the next episode.
📌 Note:
※ This content is an experimental case study using AI tools.
It is not intended as a personal evaluation of any specific individual.
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