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how to mask on roi area
you can ask user to interactively specify ROI: I = imread('fullfilename'); imshow(I) h = imfreehand(gca); wait(h) % wai...

12 years ago | 0

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pan and zoom on image
Simultaneous pan and zoom: <http://blogs.mathworks.com/pick/2005/02/24/simultaneous-pan-and-zoom/>

12 years ago | 0

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vec2mat function unrecognized by Cody
*vec2mat* is defined in Communication system toolbox and cody doesn't recognize toolbox functions.

12 years ago | 0

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can I process on video which is live capturing by camera ?
you need to capture snapshots from live video in order to process them. vidobj = videoinput('winvideo'); snapshot = getsn...

12 years ago | 0

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How to implement gray level probability density function?
you can use built in function *imhist*.

12 years ago | 0

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Plotting RMS from .csv files
RMS = (sum(col2.^2)/length(col2))^0.5;

12 years ago | 0

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how to numbering the objects in the binary image ?
Go through this demo: <http://www.mathworks.com/matlabcentral/fileexchange/25157-image-segmentation-tutorial-blobsdemo>

12 years ago | 0

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How to get the YUV value for each pixel?
if you have a RGB image you can convert it into YUV using below mentioned equations: Y = R*(0.299000) + G*(0.587000) + B*(0...

12 years ago | 0

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Answered
How to separate the color components of the color image
[I map]=imread('kids.tif'); RGB = ind2rgb(I, map); R = RGB(:,:,1); G = RGB(:,:,2); B = RGB(:,:,3);

12 years ago | 0

Question

How to add a folder permanently to matlab path?
I am using addpath to add specified folders to matlab path, but it removes the folders from the matlab path everytime the applic...

12 years ago | 3 answers | 4

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replace the elements of a matrix
A(find(A==1))=B;

12 years ago | 0

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How to obtain the DCT ( discrete cosine transform )?
The image must be an indexed image not a RGB image. You shall use ind2gray. [I, map]=imread('kids.tif'); I1=ind2gray(I,map...

12 years ago | 0

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Answered
Need basic help with low pass filtering
go through fdesign documentation: doc fdesign;

12 years ago | 1

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poincare plot of heart sound
X = RRI; X(end)=[]; Y=RRI; Y(1)=[]; plot(Y,X,'.');

12 years ago | 0

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can any one tell me how to extract only the l component of the image ..if the image is rgb ..i want only the l component of the image ,how is it possible
R=YourImage(:,:,1); G=YourImage(:,:,2); B=YourImage(:,:,3);

12 years ago | 0

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How to invert the colors in an image
doc imcomplement

12 years ago | 0

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Answered
How to use gplot for co-ordinates
gplot(eye(length(x)) , [x' , y'], '*'); % x and y are row vectors containing co-ordinates.

12 years ago | 0

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how to code rbg colour intensity of an image?????
you can extract all the three color planes using: R = YourImage(:,:,1); % Red color plane G = YourImage(:,:,2); % Green ...

12 years ago | 0

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Answered
I need help with this trivial function.
This isn't a script, it's a function. You need to pass input argument while calling the function. x = 4 ; y = fibonacci(4)...

12 years ago | 0

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How can I colour a surface plot such that one colormap is used for regions where the z-axis is greater than zero and another is used for regions where the z-axis is less than zero?
a = [jet; gray]; % In general a = [cdata1; cdata2]; colormap(a);

12 years ago | 0

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how to add data to a gui table
scope of data is local to the function is defined in.It can't be used outside that function. If you still want to access it in a...

12 years ago | 0

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Answered
How to increase amplitude of a peak in fft in MATLAB?
In the other software you might be plotting fft against indices and here you are doing it differently i.e fft vs frequency sa...

12 years ago | 0

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Plotting Issue? Conversion of one type of plot to other?
set(gca, 'xcolor' ,[1 1 1] ,'xtick' ,[]) x - axis is still there, but it just makes it invisible by setting axis color ...

12 years ago | 0

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I am getting an error that reads Index exceeds matrix dimensions. Error in lab09 (line 14) Both_Team_Scores=Full_Season(2:37,6:25);
use dbstop if error to debug your code, it will give exact location to where your code hangs. dbstop if error YourFunction...

12 years ago | 1

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Saving an axes as jpg file using saveas
F = getframe(handles.axes1); Image = frame2im(F); imwrite(Image, 'Image.jpg')

12 years ago | 3

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Plotting data from one GUI to other
You'll need to store handle of the 2nd figure/GUI in root. You can achieve this by typing the following code in opening function...

12 years ago | 0

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Is it possible to pass an image as an input to a function in Matlab?
An image is nothing but a matrix, so you can pass it like any other variable. I=imread('YourImage'); yourFunction(I)

12 years ago | 1

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error while using imshow function.
You should specify full image name(extension too ) within singles quotes. You are getting this error because logo is a predefine...

12 years ago | 0

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How to reset toggle buttons with a push button?
push buttton callback: set(handles.togglebutton1,'value',0); set(handles.togglebutton2,'value',0);

12 years ago | 0

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Answered
Font of a toggle button to change on a toggled state?
Type the following code in Togglebutton callback: h = get(hObject,'value'); if h set(handles.togglebutton1, 'string',...

12 years ago | 0