Executive definition
The TIGEE Proportion Score is an evidence-informed, standardized framework for evaluating visible body proportional harmony. It combines published anthropometric and aesthetic-preference research with clearly identified TIGEE-developed scoring metrics.
TPS measures proportion — not general attractiveness. Size is not the objective. Proportional harmony is the objective.
What TPS is not: a beauty score, a desirability score, a fitness score, a body-size score, an age score, or a health assessment. It does not determine whether a body is natural, surgically augmented, or digitally edited from appearance alone.
- TPS rewards proportional relationships. Larger glutes, smaller waists, thicker thighs, or greater muscularity do not automatically produce higher scores.
- TPS evaluates only the morphology visible in the available evidence, and reports evidence quality separately from the score.
- The scoring standard is fixed before a subject is evaluated. Thresholds are never moved to preserve an expected result.
Status & evidence classes
TPS 1.0 is an official TIGEE scoring architecture, but its exact weights and several geometric thresholds are TIGEE-developed hypotheses rather than established scientific constants. Published literature informs the system; it does not validate every weight or cutoff. Every claim in this specification carries an evidence class.
| Class | Meaning |
|---|---|
| A | Finding has substantial or repeated empirical support relevant to TPS. |
| B | Published support exists, but population, stimulus, view, or method materially affects interpretation. |
| C | Promising quantitative or aesthetic evidence exists but requires further replication or adaptation. |
| D | A TPS-specific definition, weight, threshold, index, or scoring rule created by TIGEE and awaiting validation. |
TPS is an evidence-informed aesthetic morphology framework combining published anthropometric findings with standardized TIGEE-developed scoring metrics. It is not a medically validated diagnostic instrument, and its proprietary weights are not established scientific constants.
Core architecture
Six domains, each scored 0.00–10.00, combined by fixed weights. D — weights are TIGEE-developed
TPS = 0.25(WHC) + 0.20(GP) + 0.15(GS) + 0.15(GTT) + 0.10(LP) + 0.15(ULB)
"Overall Harmony" is not a separately scored domain. The weighted TPS is the harmony result. Adding one would double-count.
Measurement vocabulary
Physical measurements, photographic ratios, and TPS scores are three different things. Conflating them is the most common failure mode in body-proportion analysis.
| Code | Name | Type | Definition |
|---|---|---|---|
| WHR | Waist-to-Hip Ratio | Physical ratio | Verified waist circumference ÷ verified hip circumference. |
| WHWR | Waist-to-Hip Width Ratio | Photo ratio | Visible waist width ÷ visible maximum hip width on a sufficiently standardized front or rear image. |
| WHC | Waist–Hip Contrast | TPS score | Composite domain integrating dimensional contrast, contour curvature, and proportional integration. |
| RP | Relative Projection | Photo metric | Posterior glute projection normalized to a defined body reference dimension. |
| PVI | Projection Vertical Index | TPS index | Vertical location of maximal glute projection within the defined gluteal region. |
| SHR | Shoulder-to-Hip Width Ratio | Photo ratio | Visible shoulder width ÷ visible hip width. |
| LBR | Leg-to-Body Ratio | Descriptor | Defined leg length ÷ defined body/height reference. Landmark protocol must accompany the value. |
| TPS | TIGEE Proportion Score | Composite | Weighted 0–10 result across the six official domains. |
Never infer inches or centimeters from an ordinary photograph. Pixel or normalized-width ratios may be calculated because ratios can be scale-independent under appropriate imaging conditions — but they remain labeled photographic measurements and are never represented as circumferences.
Unit 1 — Waist–Hip Contrast
WHC evaluates the strength and geometry of the waist-to-hip silhouette. WHR is an important descriptor, but WHC deliberately goes beyond it: identical ratios can produce visibly different contours.
WHC = 0.35(M) + 0.45(C) + 0.20(I)| Subunit | Weight | Definition |
|---|---|---|
| M — Magnitude | 35% | Dimensional waist-to-hip contrast using verified WHR and/or standardized WHWR as available. |
| C — Curvature | 45% | Geometry and continuity of the lateral waist-to-hip outline; captures information a single ratio loses. |
| I — Integration | 20% | Whether the contrast integrates coherently with torso, pelvis, and total silhouette rather than appearing abrupt or disconnected. |
Descriptive WHR reference bands B
| Verified WHR | Descriptive interpretation — not an automatic score |
|---|---|
| 0.60–0.64 | Extreme waist–hip contrast. |
| 0.65–0.70 | Central high-harmony reference region, supported by classic WHR work and glute-specific preference studies. |
| 0.71–0.74 | Strong contrast. |
| 0.75–0.79 | Moderate contrast. |
| 0.80–0.84 | Mild contrast. |
| 0.85+ | Low contrast relative to the TPS reference morphology. |
TPS explicitly rejects "lower WHR = automatically better." A very low ratio can still lose WHC points if curvature or integration is poor.
The curvature concept C
TPS treats the visible side boundary of the torso and hip as a contour x = f(y), where y is vertical position and x is lateral distance from the centerline. Hübner and Ufken (2024) found a curvature-based measure plus body width explained 92% of variance in attractiveness ratings in their line-drawing experiment, versus 63% for WHR plus width. This supports treating curvature as distinct from ratio — it does not validate the 45% weight, which remains Class D.
Unit 2 — Glute Projection
Projection is distinct from size and volume: a large glute can have mediocre relative projection, while a smaller glute can project strongly.
GP = 0.50(RP) + 0.30(PL) + 0.20(PI)| Subunit | Weight | Definition |
|---|---|---|
| RP — Relative Projection | 50% | Magnitude of posterior displacement normalized to a defined lumbar, pelvic, or body reference. |
| PL — Projection Location | 30% | Vertical location of maximal posterior projection. PVI is the preferred descriptor. |
| PI — Projection Integration | 20% | Continuity of the lumbar-to-glute and glute-to-upper-thigh profile around the projected mass. |
Projection Vertical Index D
With GT as the top of the standardized gluteal region, GB its bottom, and GPt the vertical level of maximal posterior projection:
PVI = (GPt − GT) ÷ (GB − GT)| PVI | Working location descriptor |
|---|---|
| < 0.40 | Strongly high maximal projection. |
| 0.40–0.45 | Moderately high. |
| 0.45–0.55 | Centered / middle region. |
| 0.55–0.60 | Moderately low. |
| > 0.60 | Strongly low. |
Published preference research supports middle-buttock maximal projection and a 50:50 vertical ratio as a favored configuration B, but the exact 0.45–0.55 band is TIGEE-developed.
Projection magnitude
Gluteal morphology literature has used projection ratios and reported an aesthetic criterion of ratio ≥ 2 in one young Chinese female sample. TPS does not treat 2.0 as "perfect" without preserving the exact anatomical landmarks and method from the source. Until the landmark protocol is finalized, RP is scored from standardized lateral geometry and clearly labeled as TPS methodology.
Unit 3 — Glute Shape
GS = 0.25(U) + 0.30(MG) + 0.20(L) + 0.15(LC) + 0.10(SY)| Subunit | Weight | Definition |
|---|---|---|
| U — Upper-pole fullness | 25% | Presence and proportionality of superior gluteal volume. |
| MG — Mid-glute fullness | 30% | Central gluteal fullness and continuity. |
| L — Lower-pole fullness | 20% | Completion of the lower contour without disproportionate descent or abrupt loss of volume. |
| LC — Lateral contour | 15% | Outer hip and glute contour, and the transition around maximum width. |
| SY — Bilateral symmetry | 10% | Left-right correspondence in level, shape, and visible volume. |
Round and A-shaped forms have received strong preference in published samples, but cultural and population variation exists. GS scores distribution and harmony — it does not assign "round = 10."
Unit 4 — Glute–Thigh Transition
GTT evaluates contour continuity rather than muscularity itself: whether glute volume resolves into the proximal thigh in a visually coherent way.
GTT = 0.35(CT) + 0.25(IF) + 0.20(LT) + 0.20(TM)| Subunit | Weight | Definition |
|---|---|---|
| CT — Contour transition | 35% | Smoothness and coherence from lower glute into proximal thigh. |
| IF — Infragluteal fold | 25% | Fold position, extent, and proportional relationship to the gluteal region. |
| LT — Lower-pole taper | 20% | How lower gluteal volume narrows or resolves toward the fold and thigh. |
| TM — Thigh match | 20% | Whether proximal thigh width and mass visually support the gluteal complex. |
Muscular separation is not automatically a defect. GTT asks only whether separation, fold geometry, lower-pole descent, or width mismatch disrupts continuity. This is where a large glute can still score poorly — if it appears visually detached from the leg.
Unit 5 — Leg Proportionality
LP = 0.35(HT) + 0.25(TT) + 0.20(KC) + 0.20(LL)| Subunit | Weight | Definition |
|---|---|---|
| HT — Hip-to-thigh relationship | 35% | Relative thigh width and mass compared with hips and the gluteal complex. |
| TT — Thigh taper | 25% | Progressive contour from proximal thigh toward the knee. |
| KC — Knee/calf continuity | 20% | Whether knee and calf proportions support the leg silhouette. |
| LL — Leg-length integration | 20% | How visible leg length relates to torso and overall body proportions. |
LP does not reward thinness, muscularity, or large thighs on their own. Quantitative thigh research supports analyzing width, taper, and angles, but also notes substantial population and BMI effects. C
Unit 6 — Upper–Lower Balance
ULB = 0.40(SH) + 0.30(TB) + 0.30(VI)| Subunit | Weight | Definition |
|---|---|---|
| SH — Shoulder–hip relationship | 40% | Relative visible shoulder and hip width. SHR may be recorded as a descriptor. |
| TB — Torso–bottom balance | 30% | Visual mass relationship between upper torso and lower body. |
| VI — Vertical integration | 30% | How torso length, pelvis position, leg length, and overall vertical segmentation integrate. |
ULB is what prevents TPS from collapsing into a lower-body-only score. Exceptional WHC, GP, and GS can coexist with a low ULB if the total silhouette reads as materially top-heavy or bottom-heavy.
Universal scoring anchors
| Score | Classification | Operational meaning |
|---|---|---|
| 9.50–10.00 | Reference / Exceptional | Essentially no meaningful departure from the defined reference morphology for that unit in the available evidence. 10.00 must be rare. |
| 9.00–9.49 | Elite | Very strong proportional performance with only minor deviation. |
| 8.00–8.99 | Strong | Clearly strong morphology with a visible but limited proportional compromise. |
| 7.00–7.99 | Good | Above-average harmony with one or more meaningful imbalances. |
| 6.00–6.99 | Moderate | Several strengths, but clear proportional limitations. |
| 5.00–5.99 | Mixed / Neutral | No dominant harmony or discordance relative to the reference. |
| 4.00–4.99 | Weak | Substantial departure from reference relationships. |
| 0.00–3.99 | Major departure | Strong and repeated discordance relative to the reference morphology. |
Decimals are allowed, but they must not imply precision beyond the evidence. A 9.12 derived from ordinary social-media photographs is a model output, not a laboratory measurement.
Confidence grade
Evidence quality is reported alongside the score, never inside it.
| Grade | Name | Minimum interpretation |
|---|---|---|
| A | Measurement Grade | Standardized front, rear, and lateral imagery; minimal perspective and pose distortion; anatomical landmarks visible; verified measurements where used. |
| B | Analysis Grade | Multiple useful views with manageable ordinary posing or photographic variation. |
| C | Estimate Grade | Limited views and/or aggressive posing, heels, compression or apparel effects, lens distortion, inconsistent camera height, or substantial uncertainty. |
| D | Non-scoreable | Evidence too compromised for a formal TPS. Qualitative discussion may be provided without an authoritative score. |
An 8.94 at Confidence C stays 8.94. A subject is not mathematically penalized because the available photography was poor. Report as: TPS 8.94 / 10 — Confidence B.
Standard image protocol
- Preferred evidence set: front, rear, and true lateral views.
- Neutral or minimally posed stance for primary measurements.
- Camera distance and focal length that minimize wide-angle body-shape distortion.
- Consistent camera height across views, approximately centered on the region being measured.
- Feet and pelvis as symmetrical and neutral as practical in front and rear views.
- Social-media images may still be analyzed — but ratios must be labeled photographic, and confidence must reflect the limitations.
Factors that reduce confidence
Aggressive lumbar arching, hip popping, torso twisting, heels, compression garments, and clothing that obscures landmarks all lower the grade rather than adjusting the score.
Surgical history, implants, fat transfer, digital editing, and medical status are never inferred from appearance. They are recorded only when independently verified.
Analyst workflow
- Identify the subject and evidence set; note whether measurements are verified or photographic.
- Assign a preliminary confidence grade based on image quality and standardization.
- Record raw descriptors and ratios before scoring: WHR if verified, WHWR if measurable, PVI and RP if a valid lateral view exists, SHR and LBR where appropriate.
- Score each subunit against the fixed reference morphology; document visible evidence and uncertainty.
- Calculate each domain from its subunit weights.
- Calculate the final TPS using the six fixed domain weights.
- Run the consistency check: no double-counting, no attractiveness adjustment, no size bonus, no ethnicity-based adjustment.
- Report score, classification, confidence, key strengths, key compromises, and limitations.
- If evidence is D-grade, do not publish an authoritative numerical TPS.
Required output schema
Every analysis returns at minimum these fields. Missing data is marked unavailable, never invented.
SUBJECT: TPS VERSION: 1.0 EVIDENCE SET: CONFIDENCE: A / B / C / D — RAW / SUPPORTING MEASUREMENTS — Verified WHR: Photographic WHWR: Relative Projection (RP): Projection Vertical Index (PVI): Shoulder-to-Hip Width Ratio (SHR): Leg-to-Body Ratio (LBR): Measurement limitations: — DOMAIN SCORES — 1. WHC __/10 M: __ C: __ I: __ 2. GP __/10 RP: __ PL: __ PI: __ 3. GS __/10 U: __ MG: __ L: __ LC: __ SY: __ 4. GTT __/10 CT: __ IF: __ LT: __ TM: __ 5. LP __/10 HT: __ TT: __ KC: __ LL: __ 6. ULB __/10 SH: __ TB: __ VI: __ — RESULT — FINAL TPS: CLASSIFICATION: CONFIDENCE: KEY PROPORTIONAL STRENGTHS: KEY PROPORTIONAL COMPROMISES: UNCERTAINTY / PHOTO LIMITATIONS: EVIDENCE-BASED VS TIGEE-DEVELOPED NOTES:
Non-negotiable interpretation rules
Never
- Inflate a score because the subject is attractive, famous, popular, surgically enhanced, muscular, voluptuous, or personally preferred.
- Penalize muscularity, body fat, or size in isolation. Only their proportional consequences within a defined unit are scored.
- Treat the lowest WHR or the largest glute as the optimum.
- Convert photographic pixel widths into claimed inches, centimeters, or circumferences.
- Use ethnicity as a scoring modifier. Population research may contextualize findings; the standard itself stays fixed.
- Count the same visual feature twice across domains when a more specific domain already captures it.
- Add an Overall Harmony score. The weighted TPS is the harmony result.
- Claim TPS is a medically validated diagnostic instrument, or that its weights are established scientific constants.
Always
- Distinguish published findings from TIGEE-developed methodology.
- Preserve uncertainty. When an image cannot support a measurement, say so.
- Apply the same rubric to every subject, without exception.
TPS exists to make proportional analysis more consistent — not to disguise subjective preference as objective science.
Research foundation
Published findings inform TPS. They do not automatically justify a TPS weight — proprietary weights remain Class D until validated.
Research Revision A — breast & upper body
Scoring status: TPS 1.0 remains unchanged. Research Revision A expands what the Master tracks without authorizing new score weights. A variable may be standardized for measurement before it is authorized for scoring.
No existing model score changes because of Research Revision A. A scoring change requires a numbered TPS revision, a frozen rubric, and full archive migration.
Current breast / upper-body candidate constructs
| Code | Construct | Current evidence read | TPS status |
|---|---|---|---|
| BPP | Breast Projection Proportion | Repeated preference support plus real-patient validation; projection also survives independent clinical-image research. | A candidate · measure, do not score yet |
| BWSR | Breast Width : Shoulder Width | Body-relative metric supported across Lee/Ock and Kelly work; exact preferred value varies by sample/method. | A candidate · measure, do not score yet |
| BWBR | Breast Width : Upper-Buttock Width | Direct upper/lower integration variable with strong association in Kelly real-patient validation. | A candidate · measure, do not score yet |
| LPS | Lower-Pole Shape | Mallucci morphology plus Sandberg factor-priority work independently point to lower-pole geometry as important. | A candidate · protocol needed |
| UPS | Upper-Pole Shape / Fullness | Supported, but preferred contour changes across surgeon, patient, population, and stimulus context. | B context-sensitive |
| BHT | Breast Height / Vertical Geometry | Sandberg and body-relative studies support vertical geometry as meaningful. | B protocol in development |
| NAC | Nipple–Areola Position / Direction | Measurable and preference-relevant, but appears secondary to larger geometry in some datasets and varies by study. | B secondary descriptor |
Reference findings that must remain definition-specific
- Mallucci 45:55 describes upper- versus lower-pole vertical height around the nipple meridian in three-quarter-profile natural breasts. It is not interchangeable with other upper/lower breast ratios.
- Lee & Ock / Kelly ratios compare breast width with shoulders or upper-buttock width and use their own standardized image constructions. Exact 100% versus 105% preferences are treated as context-sensitive, not universal constants.
- Size is not the construct. Current evidence supports shape, projection, position, and body integration more strongly than a simple “larger is better” rule.
Preference evidence, population anatomy, measurement methodology, and TIGEE scoring decisions are stored as separate evidence types. A published preference does not automatically become a TPS target or weight.
TPS 2.0 construct map
TPS 2.0 is a research architecture, not an active scoring version. The purpose of the construct map is to identify what the current Master should keep, what is incomplete, what new morphology deserves consideration, and what should remain outside a static proportion score.
| Decision | Constructs | Reason |
|---|---|---|
| KEEP | Waist–hip contrast; glute projection; glute shape; glute–thigh transition; leg proportionality | These remain relevant static morphology constructs, subject to future calibration and reliability testing. |
| EXPAND / REDEFINE | Upper–Lower Balance | Current ULB captures shoulders, torso-bottom mass, and vertical integration but does not resolve breast/body geometry with the same detail used for the lower body. |
| NEW CANDIDATES | Breast projection; breast-to-shoulder width; breast-to-upper-buttock width; pole geometry; breast height / placement | These have sufficient evidence to enter standardized research measurement, but not yet final TPS weighting. |
| EXCLUDE FROM STATIC TPS | Gait attractiveness; gaze attention; surgical status; skin texture; general desirability | Interesting aesthetic research, but conceptually different from static proportional morphology or too indirect to justify a TPS score. |
Architectures under consideration
Constructs are settled before weights. Weights are frozen before models are re-scored. The archive never drives the rubric.
Version control & roadmap
TPS 1.0 remains the current scoring version. Research Revision A expands the Master research scope without changing the six active domain weights. Future scoring revisions are numbered and must document every changed weight, definition, landmark, threshold, and archive-migration consequence.
Version history
Archive migration policy
- Historical scores are preserved. A TPS 1.0 result remains archived as TPS 1.0 after a newer version is released.
- New rules propagate through the index. Every previously scored subject with sufficient evidence is re-evaluated under the new locked version.
- No silent conversions. Unless a future specification explicitly validates a mathematical conversion, original evidence is reanalyzed under the new rubric.
- Insufficient evidence stays insufficient. If legacy images cannot support a new required construct, the record is marked reassessment required rather than filled with invented data.
Open specification tasks
- Validation. Score a sufficiently large and diverse image set using multiple blinded analysts; measure inter-rater reliability and test whether geometric metrics reduce subjective variance.
- Calibration. Develop landmark diagrams for front, rear, and lateral views and establish repeatable photo-measurement procedures.
- Data retention. Retain raw measurements and subunit scores — not only final scores — so future revisions can be recalculated without re-rating every subject.
- Curvature. Develop and validate a TIGEE Curvature Index before replacing structured C scoring with an automated geometric metric.
- Projection. Finalize RP anatomical landmarks before publishing a universal numeric RP target.
- Anchor rubric. Define the exact 0–10 anchor descriptions for Waist–Hip Contrast and Glute Projection.
- Breast landmark protocol. Finalize standardized SN, nipple, IMF, breast-border, and projection landmarks for photographic research measurements.
- Construct saturation. Continue source review until new high-quality studies stop materially changing the candidate construct map.