Image Processing in MATLAB Tutorial 4 - Filters and Edge Detection

Image Processing in MATLAB Tutorial 4 - Filters

In this video, various filters and edge detection techniques are covered. They are applied on an image and the output by applying various filters is explained.

Code:
subplot(2,3,1), imshow(a);

b = rgb2gray(a);
subplot(2,3,2), imshow(b);

h = ones(6,6)/36;
c = imfilter(b,h);
subplot(2,3,3), imshow(c);

h = [1 0 -1; 2 0 -2; 1 0 -1];
d = imfilter(b,h);
subplot(2,3,4), imshow(d);

e = edge(b,'canny');
imshow(e)

By: Surya Penmetsa

[abouflah]

I AM FROM ALGERIA I AM VERY INTESTING BY YOUR VIDEO ABOUT MATLAB AND IMAGES TRAITMENT.

[umutdonmez]

Ty for this video and code. i wanna try on my homework

[Ptr-NG]

Hi there! Please, once the edge detected, how may I get its geometric/real coordinates? Thank you much

[prashanthmuralishankar]

could you please tell me how to measure the dimensions of the sample in mm or cm

[slengoslengaw]

is there a way to fill in the shapes using the the edges depending on the greyscale values of the original image?

[mengyuen]

if i want to extract a picture with color from an image(e.g extract a butterfly from an image), what method do you suggest?

[ranjeet]

Error using filter
Not enough input arguments.
i am getting this error with code given in description

[taheirtariq]

could you  please tel me how i can cut these segmented in devisual window

[mubashirmasood]

it is possible to find the value of edges, value mean pixel ,

[sidhantbijaniya]

i got the following errors
pls clarify abt the issue


>> c=edge(b, 'sobel');
Error using edge
Expected input number 1, I, to be two-dimensional.

Error in edge>parse_inputs (line 547)
validateattributes(I, {'numeric', 'logical'}, {'nonsparse', '2d'}, mfilename, 'I', 1);

Error in edge (line 190)
[a, method, thresh, sigma, thinning, H, kx, ky] = parse_inputs(varargin{:});

[bhavanasairam]

can u please hell me..how to detect edges for videos

[sachindadheech]

Looks very heavy for irrelevant people. Whatever it is, very useful for relevent people.

[alexandermedinapeschiutta]

Hello, I checked your videos regarding image processing and I am grateful for your contribution. I am trying to solve a more complex task but it is giving me a hard time, I have some questions and I hope you could give me an advice.


It is about image segmentation and edge detection. You can find the question in the link below.




Thank you in advance.

[thangarajmj]

won't go into detail then WTF do u make videos