AI Image Analysis ④: Height Reversal at 180cm — When Profiles and Reality Don’t Match

📚 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: The Perfect Body? AI Says Otherwise
Episode 4: (Current Post)

AI Image Analysis ④: Height Reversal at 180cm — When Profiles and Reality Don’t Match

📌 About This Series
Using AI-powered image analysis tools, we examine full-body photos of various individuals. With coordinate-based measurements and visual cues, we uncover hidden patterns that challenge conventional impressions.

In this episode, we feature two runway models — Kim Yunjeong, who debuted from the 2015 Supermodel Korea contest, and her junior Lee Seorin, who joined in 2017. They often appear together on social media, described as "tall, glamorous besties" with very similar figures and style.

According to their official profiles, Kim is listed as 181.5 cm and Lee as 179.5 cm. However, our AI-assisted height prediction tells a different story — and the discrepancy seems to be no coincidence. Kim often uses angles and positions that make her appear taller, especially in photo shoots or shorts designed for social media. The video below showcases one such iconic example.

[Video] Classic composition where Kim steps forward to appear taller

The next footage shows both models standing side by side at a distance, posing in a natural frontal composition. Kim stands in the center to draw attention, but to the untrained eye, their height difference is hardly noticeable. However, AI analysis was able to detect subtle indicators and extract measurable height estimates from the frame.

[Video] Frontal comparison with distance — subtle but detectable height difference

Left: Kim Yunjeong / Right: Lee Seorin
Profile Heights: Kim 181.5cm vs Lee 179.5cm
AI-Predicted Heights: Kim 177.9cm vs Lee 181.8cm

These values are not simply guessed — they are calculated using coordinate-based measurements and pixel-to-height ratios. AI then identifies the clearest frame for comparison, where posture, footwear, and distance are all normalized. The following image shows the backs of three models walking side-by-side. They are all wearing sneakers, maintaining upright posture, and captured in motion under natural light — the perfect setup for accurate comparison.

One of the individuals, Jung Hayul, has recently revealed her exact height as 179.5cm after a hospital measurement. She is used here as a calibration reference in this analysis.

From left: Lee Seorin / Center: Kim Yunjeong / Right: Jung Hayul (Reference)
Measured by AI: Kim 177.9cm / Lee 181.8cm — Precision-calibrated based on coordinates

This case illustrates how AI perception can challenge the assumptions built by profile descriptions. For figures like Kim Yunjeong, who frequently use angles and positioning to appear taller, there can be a striking difference between perceived and actual height. In contrast, the next subject — Kang Jihyun — has been known for underplaying her height. She claims to be 180cm, but AI reveals a different truth.

🔹 Coming Up Next:
“She says she’s 180cm, but the AI says otherwise — in the other direction.”
AI predicts her to be even taller than her profile suggests.
She ranked #1 in AI-based body proportion analysis out of 25 candidates.
Her full analysis will be revealed in the next episode.

※ This content is a data-based AI analysis experiment using fictionalized characters.
It is not intended as personal evaluation or criticism of real individuals.

AI image analysis, AI height prediction, virtual model comparison, AI-based body measurement, height perception, AI experiments, Kim Yunjeong, Lee Seorin, deep learning analysis, body proportion, AI body scanner, image-based AI comparison, virtual identity