Hi all, I'm a beginner in matlab. I have a grayscale image and I would like to get the intensity value of every pixels in the image. As far as I know, imhist will only show a graph of the intensity value. Instead, I want to retrieve the value (i.e the integer value). Thanks in advance

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1/4/2010 5:23:04 AM

"Hendy Sutomo" <hendy.sow@gmail.com> wrote in message <hhrtvo$2g3$1@fred.mathworks.com>... > Hi all, > > I'm a beginner in matlab. > I have a grayscale image and I would like to get the intensity value of every pixels in the image. > As far as I know, imhist will only show a graph of the intensity value. Instead, I want to retrieve the value (i.e the integer value). > > Thanks in advance but - the values are already there: in your matrix... us

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1/4/2010 7:54:04 AM

Which matrix u mean? sorry, I'm a total noob here Thanks for ur help

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1/4/2010 8:07:03 AM

"Hendy Sutomo" <hendy.sow@gmail.com> wrote in message <hhs7j7$9if$1@fred.mathworks.com>... > Which matrix u mean? > sorry, I'm a total noob here > > Thanks for ur help well, look here... http://www.mathworks.com/access/helpdesk/help/techdoc/learn_matlab/f3-1186.html us

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1/4/2010 8:16:03 AM

Well..... what i did is load an grayscale image, and use impixel to determine the value of pixels. But now i need the intensity value of each pixels. I dont really get the information from the link u gave me. Thanks for ur help -hendy-

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1/4/2010 8:26:03 AM

-hendy- If you have an image, the image is in a numerical variable that is an array. The elements of that array ARE your intensity values. For example: % Read in standard MATLAB demo image. grayImage = imread('cameraman.tif'); imshow(grayImage, []); title('Original Grayscale Image'); set(gcf, 'Position', get(0,'Screensize')); % Maximize figure. Let's say you want the intensity value at row 100, column 230. Well then you'd just say intensityValue = grayImage(100, 230); It's as simple as that.

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1/4/2010 11:10:52 AM

Thanks alot ImageAnalyst. Now I get the idea. -hendy-

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1/4/2010 12:56:03 PM

Image Analyst : How to get the intensities of each of the image pixels , then compare those intensities so that that are near to each others in their value or even are equal will be replaced by the mean of those intensities.Then , the location of the parent pixel will be obtained with the location of the leaf children pixels of that parent pixel in a text file.Please help me to do so and thank you for you help.

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2/6/2016 3:37:03 PM

Hi Image analyst Hope you are fine, need your advise for the issue mentioned in subject line. I have an image similar and need to co-relate the temperature scale given on the right hand side of image to color code so that I can get the temperature of every pixel on the image.How can it be done Regards Siddharth ImageAnalyst <imageanalyst@mailinator.com> wrote in message <df97e1ed-d029-4a4b-ae46-0b32c140497d@f5g2000yqh.googlegroups.com>... > -hendy- > If you have an image, the image is in a numerical variable that is an > array. The elements of that array ARE your intensity values. > > For example: > > % Read in standard MATLAB demo image. > grayImage = imread('cameraman.tif'); > imshow(grayImage, []); > title('Original Grayscale Image'); > set(gcf, 'Position', get(0,'Screensize')); % Maximize figure. > > Let's say you want the intensity value at row 100, column 230. Well > then you'd just say > intensityValue = grayImage(100, 230); > > It's as simple as that.

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12/18/2016 9:54:03 AM

"SIDDHARTH MOHAN" Ask over in Answers so I can attach m-files and images. I did that for someone here http://www.mathworks.com/matlabcentral/answers/317598-mapping-of-temperature-values-on-roi-of-image#answer_248208

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12/23/2016 5:22:03 AM

please does any one know how to get the pixel values in images. i am using matlab 6.5 and it doesn't have the impixel function. is there an alternative. Also how do you draw lines on images, i am trying to track markers on an image and when i have tracked them to be a able to draw lines on the markers. thank you Tosin tosin wrote: > please does any one know how to get the pixel values in images. i am > using matlab 6.5 and it doesn't have the impixel function. is there an > alternative. > > Also how do you draw lines on images, i am trying to track markers on &g...

Hello all I have two tiff images (named A and B). Both have 7 layers at the same dime= nsion (4169,6289,7). First I'd like to find location of max value in A imag= e and then I need to get the values (not max values, reall values) of B ima= ge in matrix dimension (4169, 6289) according to location of max value whic= h found from A image in previous step. I just wrote next code to achieve th= is purpose. Then I wrote output tiff image. But when I display this tiff im= age, whole screen is black. Can you tell me what's wrong with this code? A_max_loc=3DMAX(A,INDEX,DIMENSION=3D3...

Hello all,=09 I have a question to solve following issue.=20 I have two images. One is a multiband image with 7bands. Another is an clas= sifiction image with 3 classes. The classes named by class1 to class3. I'd = like to obtain a single max/min values from a multiband image according to = pixel locations of each classes (class1, class2, class3) of classification = image. Could you help me for this? Thank you very much Dry in water writes: > > Hello all, > > I have a question to solve following issue. > I have two images. One is a multiband image wi...

hello all, i want to extract the value of each pixel from an image (color or greyscale)as single values.I wrote a function as follows.Here i am getting the green,blue,red components using methods of ColorModel and then taking the average(sum of r,g,b divided by 3).I don't know if this is the right way to do this.Can anyone tell me if there is an alternate/better method ? thanks jim public double[] getpixels(String imgfilename)throws Exception{ BufferedImage img =ImageIO.read(new File(imgfilename)); int ht=img.getHeight() ; int wd=img.getWidth(); int[] pixels = new int[wd * ht]; PixelGra...

Hi, I would like to obtain a pixel value from any image using a GUI. i have made a few research. and this is all i get, example: load flujet; image (X); colormap (jet); I would like to read the pixel value just like the given example. Please help! Sha ...

Dear All, Can any one please Guide me on how to write a mat lab code to find an intensity values in one image, then exclude the values which I do not want and show them on the image .maybe i could circle the area which i do not want in the same image because of it's intensity values . Regards See my "BlobsDemo" image segmentation tutorial: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862 It does all of that. Thanks ImageAnalyst , can you please suggest any other image than blobs to run your script. Jamal ImageAnalyst <imageanalyst@m...

Hi, I would like to obtain a pixel value from any image using a GUI. i have made a few research. and this is all i get, example: load flujet; image (X); colormap (jet); I would like to read the pixel value just like the given example. Please help! Sha...

I have 10 images (frame-sequence). I want to make a new image A, whereas each pixel in A(x,y) is the mean-value of the pixel at (x,y) in the 10 original images. How to proceed? "Torvald Helmer" <torvald.helmer@mathworks.com> wrote in message <frb67e$qeq$1@fred.mathworks.com>... > I have 10 images (frame-sequence). I want to make a new > image A, whereas each pixel in A(x,y) is the mean-value of > the pixel at (x,y) in the 10 original images. > > How to proceed? A = (I1 + I2 + ... + I10) / 10; ...

hi i need to get value of each pixel in an image as a single value.The image may be color or greyscale .I tried as follows.I don't know if i am doing it right,and i want to know if it can be done in more compact manner.If anyone can advise/help pls do import java.awt.color.ColorSpace; import java.awt.image.*; import java.io.*; import javax.imageio.ImageIO; public class PixelDataDemo{ public static void main(String[] args){ PixelGrabber pg; BufferedImage img; try{ img=ImageIO.read(newFile("F:\\mygallery\ \myimage.png")); int ht=img.getHeight...

Hi, all, For each pixel in each image of a sequence of 15 images, I need to store its RGB intensity values so that if I want, I can plot any pixel's R, G and/or B's intensity values across the sequence. I've been reading about structs and cells and vectors, but I am not sure what is best to use. Hope this makes sense. Much thanks. - Rise "Rise " <rise_riyo@hms.harvard.edu> wrote in message <hukvdl$ank$1@fred.mathworks.com>... > Hi, all, > > For each pixel in each image of a sequence of 15 images, I need to store its RGB intensity va...

Hi, group, I think it is easy to get the pixel values of a horizontal or vertical line in an image, such as: img = imread('test.bmp'); h_line = img( 10:10, 1:120); % for the horizontal line My question is how to get the pixel values of a line with a direction?( Neither horizontal nor vertical, i.e. 25 degree). The start and end positions of the line are given. Thanks. Vol Hi, help linspace <http://www.mathworks.com/access/helpdesk/help/techdoc/ref/linspace.html> help interp2 <http://www.mathworks.com/access/helpdesk/help/techdoc/ref/interp2.html> J�r�me J�r�me ...

Hi. how can I quickly change matrix A to matrix B? % A is image A = [21 38 64; 12 1 30; 11 4 9]; % imagesc(A), colormap gray % B is [n,3] coordinate matrix of color intensity B =[1 1 21; ... 1 2 38; ... 1 3 64; ... 2 1 12; ... 2 2 1; ... 2 3 30; ... 3 1 11; ... 3 2 4; ... 3 3 9]; Thanks V. cucche wrote: > Hi. > how can I quickly change matrix A to matrix B? > > % A is image > A = [21 38 64; 12 1 30; 11 4 9]; > % imagesc(A), colormap gray > > % B is [n,3] coordinate matrix of color intensity > B =[1 1 21; ... > 1 2 38; ......

Hi all, I am relatively new to the IP toolbox in MATLAB. I have a .TIFF image which I am converting to binary using the 'im2bw' function. Now I need to get the pixel values of this binary image in the form of a 2D array (exactly as they are, the images are 1320 * 1032) that I will use to do some operations in Java. Can someone point me in the right direction as to how can I do this? Thanx in advance. Mandeep Mandeep wrote: > > > Hi all, > > I am relatively new to the IP toolbox in MATLAB. > I have a .TIFF image which I am converting to binary using the > '...

How to create a 3d image from a set of 2d images? i have tried to use the following : I=imread('moon.tif'); [x,y]=size(I); X=1:x; Y=1:y; [xx,yy]=meshgrid(Y,X); i=im2double(I); figure;mesh(xx,yy,i); colorbar figure;imshow(i).. But when i replace the image by some other image it says: Warning: size(CData) must equal size(ZData) or size(ZData)-1 for flat shading ... Biman Chandra Dey Use cat(3,....) to put all your 2D images into a 3D volumetric image. All your 2D images must be exactly the same size. ...