What Is the Frankfort-tip Angle in FaceIQ Labs' Facial Analysis?

Key facts

• The Frankfort-tip angle is the absolute angle between the subnasale–pronasale (nose base to nose tip) direction and the porion–orbitale (Frankfort) direction.
• It is a Harmony measurement taken in the side view, in the nose region.
• Lower values mean the nose base-to-tip direction lies closer to the Frankfort reference; higher values mean more deviation.
• The value is absolute, so it does not preserve whether the deviation is above or below the reference.
• It differs from Nose Tip Rotation Angle, which uses the columella rather than the nose tip as its endpoint.
• FaceIQ Labs describes it as a FaceIQ photographic construction; the cited research does not validate this exact landmark formula or its scoring range.
• Worked example: a base-to-tip segment 20° away from the Frankfort line gives 20°, whether the signed difference is positive or negative.
• Harmony covers 70+ facial ratios and angles and is weighted roughly 60% from the front photo and 40% from the side photo.
• Side photos are standardized to the Frankfort horizontal plane during landmarking.

What does the Frankfort-tip angle measure?

The Frankfort-tip angle is a FaceIQ Labs Harmony measurement taken from the side view of the nose. It is the absolute angle between the subnasale–pronasale direction, running from the nose base to the nose tip, and the porion–orbitale Frankfort direction. It places the direction of the nose tip within a head reference.

Which landmarks does the Frankfort-tip angle use?

The Frankfort-tip angle at FaceIQ Labs uses four landmarks on the side photo. Subnasale, the nose base, and pronasale, the nose tip, define the base-to-tip direction. Porion, the ear-opening landmark, and orbitale, the lower orbital landmark, define the Frankfort direction. The angle between those two directions is the measurement.

What does a lower or higher Frankfort-tip angle mean?

A lower Frankfort-tip angle means the nose base-to-tip direction lies closer to the Frankfort reference in FaceIQ Labs' analysis, while a higher angle means it deviates more. Because the value is absolute, it does not show whether the deviation is above or below the reference. FaceIQ Labs states its example values are not a target range.

How is the Frankfort-tip angle different from the Nose Tip Rotation Angle?

The Frankfort-tip angle differs from FaceIQ Labs' Nose Tip Rotation Angle in its endpoint. The Frankfort-tip angle uses the nose tip as its endpoint, while the Nose Tip Rotation Angle uses the columella instead. Both are Harmony guides in the nose region of the Help Center.

What does a Frankfort-tip angle example look like?

In FaceIQ Labs' worked example, a nose base-to-tip segment 20° away from the Frankfort line gives a Frankfort-tip angle of 20°, whether the signed difference is positive or negative. FaceIQ Labs states that example values explain the calculation; they are not a target range and are not measurements of its schematic.

Is the Frankfort-tip angle based on validated research?

No. FaceIQ Labs describes the Frankfort-tip angle as a FaceIQ photographic construction. Clinical profile analysis provides context, but the cited work does not validate this exact landmark formula or its scoring range. FaceIQ Labs says its score weights and reference ranges are model settings, not something the cited papers collectively validate. The one paper cited, Biller & Kim (2009), compared ratings of edited brow and nose features on four female models and emphasized individual facial harmony. It is context for feature relationships, not a test of this metric.

How should I read my Frankfort-tip angle result?

A misplaced ear or orbital reference landmark changes the Frankfort comparison, and so changes the Frankfort-tip angle at FaceIQ Labs. The guide advises inspecting the drawing to understand direction, not just magnitude. FaceIQ Labs also provides manual landmark review and editing tools for checking landmark placement. Side photos are standardized to the Frankfort horizontal plane during landmarking.

How does the Frankfort-tip angle fit into the Harmony score?

The Frankfort-tip angle is a side-view nose measurement within FaceIQ Labs' Harmony pillar, which covers 70+ facial ratios and angles compared to ideal ranges adjusted for gender and ethnicity. Harmony is weighted roughly 60% from the front photo and 40% from the side photo, so this angle belongs to the side-photo portion.

Which other nose measurements are in the same region?

FaceIQ Labs groups the Frankfort-tip angle with seven other nose-region Harmony guides: Nasal Projection, Nasal Tip Angle, Nose Tip Rotation Angle, Nasolabial Angle, Nasofacial Angle, Nasomental Angle and Nasal Width-to-Height Ratio. Each has its own measurement guide in the Help Center under Harmony & facial ratios.

Frequently asked questions

What is the Frankfort-tip angle in FaceIQ Labs?

It is the absolute angle between the subnasale–pronasale (nose base to nose tip) direction and the porion–orbitale (Frankfort) direction, measured in the side view as part of FaceIQ Labs' Harmony analysis.

Does a lower Frankfort-tip angle mean anything?

A lower angle means the nose base-to-tip direction lies closer to the Frankfort reference; a higher angle means more deviation. The value is absolute, so it does not show whether the deviation is above or below.

How does the Frankfort-tip angle differ from the Nose Tip Rotation Angle?

The Frankfort-tip angle uses the nose tip as its endpoint, while the Nose Tip Rotation Angle uses the columella.

Is the Frankfort-tip angle clinically validated?

No. FaceIQ Labs describes it as its own photographic construction. The cited research does not validate the exact landmark formula or its scoring range.

Which photo is used for the Frankfort-tip angle?

It is a side-view measurement. FaceIQ Labs standardizes side photos to the Frankfort horizontal plane during landmarking.

Can a wrongly placed landmark change the Frankfort-tip angle?

Yes. FaceIQ Labs notes that a misplaced ear or orbital reference changes the comparison and the resulting angle.