A9 - Morphological Operations

First column: original image

second column: dilated/eroded with 2x2 ones

third column: dilated/eroded with 2x1 ones

fourth column: dilated/eroded with 1x2 ones

fifth column: dilated/eroded with cross

square dilated

square eroded

triangle dilated

triangle eroded

hollow square dilated

hollow square eroded

Plus dilated

plus eroded

thin(square) skel(square)

score: 7/10. late posting and my results is somehow wrong :|

A8 - Enhancement in the Frequency Domain

Activity 8.A Convolution Theorem

i. Two dots

ii. Two Squares
iii. Two Gaussians

Activity 8.B Fingerprints : Ridge Enhancement

Activity 8.C Lunar Landing Scanned Pictures : Line removal

Activity 8.D Canvas Weave Modeling and Removal

score: 7/10. late posting

A7 - Properties of the 2D Fourier Transform

Familiarization with FT of different 2D patterns

Square

FT of square

Annulus

FT of annulusSquare annulus
FT of square annulus

Two slits along x-axis symmetric about the center (spanning the whole y-axis)

FT of Two slits along x-axis symmetric about the center (spanning the whole y-axis)Two dots along x-axis symmetric about the center
FT of Two dots along x-axis symmetric about the center
Sinusoid of frequency 4
FT of sinusoid of frequency 4
Sinusoid of frequency 12
FT of Sinusoid of frequency 12
Sinusoid of frequency 16
FT of Sinusoid of frequency 16
Sinusoid of frequency 20 with bias of 3
FT of Sinusoid of frequency 20 with bias of 3
Sinusoid of frequency 20 with bias of 5
FT of Sinusoid of frequency 20 with bias of 5
Sinusoid rotated 30 degrees
FT of Sinusoid rotated 30 degrees
Sinusoid rotated 45 degrees
FT of Sinusoid rotated 45 degrees
a product of two corrugated roofs, one running in the X-direction, the other in Y.

z = sin(2*%pi*4*X).*sin(2*%pi*4*Y);

FT of two corrugated roofs

a product of two corrugated roofs, one running in the X-direction, the other in Y with rotation.

z = sin(2*%pi*4*X*sin(30)).*sin(2*%pi*4*Y*cos(45));

FT

score: 8/10. late posting