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Download Biometrics, Computer Security Systems and Artificial by Khalid Saeed, Jerzy Pejas, Romuald Mosdorf PDF

By Khalid Saeed, Jerzy Pejas, Romuald Mosdorf

This publication comprises over 30 articles via recognized scientists/engineers reflecting the newest advancements in complicated computers and their purposes inside Biometrics, details expertise safety and synthetic Intelligence.

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The four output images become the matrices of m/2 x n/2 pixels. Low frequency subimage LL (Ai) possesses high energy, and is a smallest copy of original images {Ag). The remaining subimages LH, HL, and ////respectively extract the changing components in horizontal {Dn), vertical {D12), and diagonal {Di}) direction [2]. 1 Lo 1^2 Columns LH lil m H Hi 2il Columns Lo Rows X Downsample columns HL Columns l4,2 Di'M,l li2 Di'j+1,2 HH Hi 24rl Ai. l. 2. The size of output images is the same as the input image.

The vertical boundaries of the lip can be found by applying gradient method to the refined search area and regarding the integral horizontal projection of this gradient method. Exact finding of corners of mouth is very most important because on basis of corners of mouth, edge of mouth will be defined. Described above method of finding comers of mouth no always gives satisfactory results. If studied speaker has beard, and then gradient method can be ineffective. One should to introduce sure modifications.

It was been possible to search the pupils by looking for two dark regions lie within a certain area of the face. ) line of eyes. Before, the image face is converted to the grayscale. Following equations (1,2, 3) describe way of finding the pupils. size _y\ (1 j 21 \ = MAX X \face _ imagej J - face _ image^^^j |, y = 1.. 5/ze_:v /o\ (5) ^i=h_lme-l To search the lips initially, the approximate positions of the corners of mouth are predicted, using the positions of the eyes, the model of face and the assumption, therefore one should to have a near frontal view.

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