reducing the size of image

i have a code for corner detection 

i = imread('door.jpg');

%Make image greyscale
if length(size(i)) == 3
  im =  double(i(:,:,2));
else
  im = double(i);
end

cs = fast_corner_detect_9(im, 30);
size(im)
im1=imresize(im,.5);
cs1 = fast_corner_detect_9(im1, 30);
image(im/6)
axis image
colormap(gray)
hold on
axis off
plot(cs(:,1), cs(:,2), 'r.'),title('Corner Detection')
figure,imshow(uint8(im)),title('Original Image ')

the size of image is  272x185

i have reseized the image using

imresize(im,.5)

but the reseized image is not displaying,plz help to display both images

Answer 1

[Jan]

I guess, that the conversion by uint8 let all information disappear. Please try this:

imshow(uint8(im * 255))

or

imshow(im)

[kash]

Jan i think u did not understand my question

for my code

plot(cs(:,1), cs(:,2), 'r.'),title('Corner Detection')

for reseized image,the image is not displaying

Answer 2

[Image Analyst]

Instead of

image(im/6)

Try this:

imshow(im1, []);

The problem was that your resized image was called im1 and you never passed that to imshow().

[kash]

i = imread('door.jpg');

%Make image greyscale

if length(size(i)) == 3

im = double(i(:,:,2));

else

im = double(i);

end

cs = fast_corner_detect_9(im, 30);

size(im)

im1=imresize(im,.5);

cs1 = fast_corner_detect_9(im1, 30);

image(im1/6)

axis image

colormap(gray)

hold on

axis off

plot(cs(:,1), cs(:,2), 'r.'),title('Corner Detection')

plot(cs1(:,1), cs1(:,2), 'r.'),title('Corner Detection1')

figure,imshow(uint8(im)),title('Original Image ')

this ismy code ,i have passed im,im1,but both the imageas are not displayed

[kash]

and Image analyst and i alaso want to draw a bounding box for this output image ,plz help

[Image Analyst]

Did you post your image to tinypic.com so people can try your code? I do not have fast_corner_detect_9() either.

[Walter Roberson]

http://www.mathworks.com/matlabcentral/fileexchange/13006-fast-corner-detector