[ee341]group10 lab2 nguyendinhminhnhat truongminhquoc ngonhutri

7/28/2019 [EE341]Group10 Lab2 NguyenDinhMinhNhat TruongMinhQuoc NgoNhuTri

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Lab_2 EE341Group: Nguyn nh Minh Nht-Trng Minh Quc-Ng Nh Tr

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REPORT LAB2

EE 341

GROUPs MEMBERS

Nguyn nh Minh Nht

Trng Minh Quc

Ng Nh Tr


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AssignmentsI. Assignment1: Edge Detection

img=imread('DailyShow','jpeg');img_gray=rgb2gray(img);imshow(img_gray);title('Gray Image');figure;Gray_db=im2double(img_gray);imshow(Gray_db);title('Gray Double Image');figure;h1 = [-1 0 1; -2 0 2; -1 0 1];h2 = [1 2 1; 0 0 0; -1 -2 -1];

M1=conv2(Gray_db,h1);M2=conv2(Gray_db,h2);M3=((M1).^2+(M2).^2).^0.5;img_M1=abs(M1);img_M2=abs(M2);img_M3=abs(M3);imshow(img_M3);title('The Overall Gradient Magnitude');figure;imshow(img_M2);title('The Row Gradient Magnitude');figure;imshow(img_M1);title('The Column Gradient Magnitude');

The resulng images:


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II. Assignment2: ScalingSimple versionfunction y = ScaleSimple(s)c = rgb2gray(imread('DailyShow', 'jpeg'));a = im2double(c);[n m] = size(a);x = 1;y = 1;b = ones(round(n/s) - 1,round(m/s)-1);s1 = (s+1)/2 - 1;if (mod(s,2) == 0)

for i = 1:s:n-sfor j = 1:s:m-s

b(x,y) = a(i,j);y = y+1;

endy = 1;x = x+1;


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It appears the Simple version has the beer thumbnail image.

III.Assignment3: Image Flipping

From this fgure,

(i) x[N-n+1, m] is the image that horizontal ip compare to the x[n,m]image

subplot(1,2,1);


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>> imshow(img_gray);

>> tle('[n,m]');

>> subplot(1,2,2);

imshow(ipud(img_gray));>> tle('x[N-n+1, m]');

(ii) x[n, M-m+1] is the image that vercal ip compare to the x[n,m] image.subplot(1,2,1);

imshow(img_gray);

>> tle('[n,m]');>> subplot(1,2,2);

>> imshow(iplr(img_gray));

>> tle('x[n, M-m+1]');


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(iii) x[N-n+1, M-m+1] is the image that both horizontal and vercal ipcompare to x[n,m] image.

>> subplot(1,2,1);

imshow(img_gray);

tle('[n,m]');

subplot(1,2,2);

>> imshow(ipud(iplr(img_gray)));

>> tle('x[N-n+1, M-m+1]');


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IV. Assignment4: Image Expandingfunction y = linearinter

c = rgb2gray(imread('DailyShow', 'jpeg'));a = im2double(c);imshow(a);title('Original');figure;

[n m] = size(a);x = 1;y = 1;b = ones(n*2,m*2);for i = 1:n

for j = 1:mb(x,y) = a(i,j);y = y+2;

end


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y = 1;x = x+2 ;

endfor i = 1:n*2-1

for j = 1:m*2-1if (mod(i,2) == 0) && (mod(j,2) == 0)b(i,j) = (b(i-1,j-1) + b(i-1,j+1) + b(i+1,j-1) +

b(i+1,j+1))/4;elseif (mod(j,2) == 0)

b(i,j) = (b(i,j-1) + b(i,j+1))/2;elseif (mod(i,2) == 0)

b(i,j) = (b(i-1,j) + b(i+1,j))/2;end

endendfor i = 1:n*2

b(i,m*2) = b(i,m*2-1);endfor i = 1:m*2

b(n*2,i) = b(n*2-1,i);end

imshow(b);title('2Nx2M Image');


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[ee341]group10 lab2 nguyendinhminhnhat truongminhquoc ngonhutri

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