Hi All!

To solve this problem I used assumption, that two poligons should have same angles between corresponding edges and have the same scale factor for all corresponding edge's lengths.

Does it right?

## 10556 - Biometrics

**Moderator:** Board moderators

It's said that "The vertices for both polygons correspond to the same set of features in the same order"

For examle we may have:

1poligon: right ear tip, chin cleft, right eye, nose, left eye, left ear tip, space between front teeth

2poligon: space between front teeth, right ear tip, chin cleft, right eye, nose, left eye, left ear tip

Can you give me example.

### I also get WA on p10556

I use the following idea: If the polygon's vertices are denoted by 1,2,3,...,n, then I chek if the triangles 123, 234, 345, ..., (n-2)(n-1)n, (n-1)n1, n12 are similar to the corresponding triangles in the second polygon. If this is the case, then I also check if the angles between the vectors 21 and 23, 32 and 34, 43 and 45, ..., n(n-1) and n1, and 1n and 12, have the same sign as their corresponding angles in the second polygon, thus checking if the polygons have the same orientation.

Is this correct? I keep receiving WA...

SM for BiK

Is this correct? I keep receiving WA...

SM for BiK

### 10556 Biometric

1) Can anybody send me some critical inputs for this problem.

2) What is the criteria of scaling in the problem. whether the scaling would be done by fixing one particular point and then stretching the rest or whether it would be done with respect to a mid point.

3) Is it posible that a polygon is scaled first, translated to the third quardrant from the first quardrant and then reflected?

2) What is the criteria of scaling in the problem. whether the scaling would be done by fixing one particular point and then stretching the rest or whether it would be done with respect to a mid point.

3) Is it posible that a polygon is scaled first, translated to the third quardrant from the first quardrant and then reflected?