Analysis of the Human Face 9/12/06. What are the Parameters? Length of Ear Interpupillary Distance...
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Transcript of Analysis of the Human Face 9/12/06. What are the Parameters? Length of Ear Interpupillary Distance...
![Page 1: Analysis of the Human Face 9/12/06. What are the Parameters? Length of Ear Interpupillary Distance Length of face Width of face –2 measurements (ear.](https://reader036.fdocuments.us/reader036/viewer/2022082821/5697c01e1a28abf838cd0d5b/html5/thumbnails/1.jpg)
Analysis of the Human Face
9/12/06
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What are the Parameters?
• Length of Ear
• Interpupillary Distance
• Length of face
• Width of face– 2 measurements (ear to nose, both sides)
• Length of nose
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Fibonacci numbers
• Fibonacci numbers are defined as a number which when divided by the number in the sequence before it, yields a number close to 1.618 – fixed at precisely 1.618 after the 13th in the series. – known as the "golden ratio."
• 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584, …
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GOLDEN RATIO = 1.618
• 233 / 144 = 1.618
• 377 / 233 = 1.618
• 610 / 377 = 1.618
• 987 / 610 = 1.618
• 1597 / 987 = 1.618
• 2584 / 1597 = 1.618L. Pisano Fibonacci
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The Golden Ratio in the Human Face
• There are several golden ratios in the human face. – refers to the "ideal human face" determined by
scientists and artists.• The total width of the two upper front teeth /their height • Length of face / width of face,• Distance between the lips and where the eyebrows
meet /length of nose• Length of face / distance between tip of jaw and where
the eyebrows meet• Length of mouth / width of nose• Width of nose / distance between nostrils,• Distance between pupils / distance between eyebrows.
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Other Parameters?
• Shadow
• Skin Reflectance
• Emotion?
• Others?
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Data Collection
• Once we agree on measurements to be taken, each student will be assigned a number, will take face diagrams and a ruler.
• The class will be divided into two groups at random
• Each group will measure the facial parameters of the members of the other group and record the data on the face diagrams– This will provide multiple measurements on each
subject
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How will we analyze the data?
• Measurements for each subject will be entered into an Excel spreadsheet and used to calculate:– Mean, deviation, variance and standard deviation
• Data will be combined to analyze– Group 1 vs. group 2– Male vs female– Other groupings?
• Differences between groups will be analyzed for significance using the student’s t test
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What does the analysis mean?
• Have we introduced any biases into our measurement?
• Is what we have done an “experiment”?
• What conclusions can be drawn from our measurements? Can we extrapolate to the general population?
• What would you do to improve the quality and/or significance of the data?
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How facial data are used
• The analysis of the model parameters for sample populations has revealed variations according to subject age, gender, skin type, and external factors (e.g., sweat, cold, or makeup).
• Users can edit the overall appearance of a face (e.g., changing skin type and age) or change small-scale features using texture synthesis (e.g., adding moles and freckles)
• Currently under intense development for counter-terrorism (face recognition)
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For Next Time
• Please read Chapter 10 (page 145) in “The Art of Science”.
• For extra credit:– Obtain data from the internet or other source
on facial data from another population• E.g., distance between eyes as a function of
gender, age, etc.