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palmprint recognition matlab code, URGENT

On Programmer » Matlab

1,461 words with 0 Comments; publish: Sun, 18 May 2008 22:22:00 GMT; (20078.13, « »)

hi all

i'm new to this group, i have a project of palmprint recognition system, and

i read so much about it and i understood it, but i faces some problems in s

tarting the programing, i need help in the preprocessing stage to determine

the area of interest within the palm image.

the attached image helps in understanding the technique, the technique is as

follow:

Step 1. Apply a lowpass filter, such as Gaussian smoothing, to the original

image, A threshold, Tp, is used to convert the convolved image to a binary i

mage,

Step 2. Obtain the boundaries of the gaps, (Fx; Fy), between the fingers usi

ng a boundary tracking algorithm (see Fig. c).

Step 3. Compute the tangent of the two gaps. Let (x1; y1) and (x2; y2) be an

y points on (F1x; F1y) and (F2x; F2y), respectively. If the line passing tho

ugh these

two points satisfies the inequality, (Fiyj >= mFixj +c) for all i and j (see

Fig. d), then the line (y = mx + c) is considered to be the tangent of the

two gaps.

Step 4. Line up (x1; y1) and (x2; y2) to get the Y-axis of the palmprint coo

rdinate system, and use a line passing through the midpoint of these two poi

nts, which is

perpendicular to the Y-axis, to determine the origin of the coordinate syste

m.

Step 5. Extract a subimage of a fixed size.

i need only step2 and step3 and i will be gracefull.

thanks all

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