drawing on the image

Started by swamigmv in Matlab DSP12 years ago 1 reply

hi all i am doing a project on image segmentation where i have to specify the area to be segmented(not exactly but a rough scketch) now how...

hi all i am doing a project on image segmentation where i have to specify the area to be segmented(not exactly but a rough scketch) now how can i get that sketch i draw on the image.i.e. the set of pixels that i mark? (or) is there any way to scribble on a image and get those scribbles as inputs?


Image Recognition based on defined images

Started by Prasun Dhara in Matlab DSP10 years ago 2 replies

Hi All I have a image database which has several known images with its label.Now I want to compare this images with a unknown input...

Hi All I have a image database which has several known images with its label.Now I want to compare this images with a unknown input image. If any known image is found in the unknown input image i need to label the image according to the image database. For Example: I have 4 images A,B,C and D in my sample image database Image label A lion B tiger C cow ...


Modifying Bits in an image - Need Urgent Help

Started by msnustian in Matlab DSP12 years ago

hi, I am new to Matlab. I have a question..and want to know the solutions as earlier as possible. Suppose i have an image and i converted...

hi, I am new to Matlab. I have a question..and want to know the solutions as earlier as possible. Suppose i have an image and i converted it to binary. Treating the image as a matrix. I am changing the last bit of the image. How can i copy a single colum vector into the last bit of the image matrix. It is not necessary that the whole last column will be changed. I really need ...


Re: image signatures

Started by Euphoria Stone in Matlab DSP14 years ago

Hi, The best way to learn MATLB is to explore it and check out its features. Image signatures are basically a simple representation of your...

Hi, The best way to learn MATLB is to explore it and check out its features. Image signatures are basically a simple representation of your image or object- rather than looking at a object in 2 dimensions you can extract the important structural information of the image and represent it as a vector. This simplifies your problem. I've already sent a mail about image segmentation- you can


Binary image

Started by k.al...@surrey.ac.uk in Matlab DSP13 years ago

Hello, I have got Binary image from medical simulation. How can I read this image and covert it to ASCI image please? Khalid

Hello, I have got Binary image from medical simulation. How can I read this image and covert it to ASCI image please? Khalid


getting a picture in C

Started by suganya boopathy in Matlab DSP16 years ago 1 reply

Hai, i am engaged in an image encoding project. could anyone of you help me on the following? 1. how to acquire an image...

Hai, i am engaged in an image encoding project. could anyone of you help me on the following? 1. how to acquire an image file in C language and a motion picture in C and matlab? 2. for the acquired image, i have to perform 3D - DCT on that image. like dct2


image processing using matlab

Started by harishnrn in Matlab DSP13 years ago 1 reply

hi, actually i am working on image processing. i have a blurred image with me which i have successfuly deblurred it using matleb. now...

hi, actually i am working on image processing. i have a blurred image with me which i have successfuly deblurred it using matleb. now my aim is to segment the image obtained using matlab? can any onle tel me how to proceed at the earliest? thanks in advance harish


reading a 32 bit geotiff image

Started by avinash_uv in Matlab DSP12 years ago 1 reply

I am using Matlab 7 (R14) service pack 1. The imread function can not take a 32 bit geotiff image. Is there a way to read out the image data...

I am using Matlab 7 (R14) service pack 1. The imread function can not take a 32 bit geotiff image. Is there a way to read out the image data from this file. Is there a standard header length after which the data starts. I can not use this to get the image out: % Image w_line = 9912; %from imfinfo h_nlines = 10081; % " skip = 81127; % = image_size(from imfinfo) - (w_lines*h_nli...


please help me..with save code

Started by enas...@gmail.com in Matlab DSP12 years ago 1 reply

hi all in my image processing application.. i have two axes axes1 for original image.. axes2 for filtered image.. i have a number of...

hi all in my image processing application.. i have two axes axes1 for original image.. axes2 for filtered image.. i have a number of filters which change the original and display the filtered image on axes2 but when i save these changes..it is save the original image without saving the changes made to the original image.. my teacher said to me that matlab doesn't save the changes made...


reconstructing the gray scale image from binary

Started by swathi sairam in Matlab DSP11 years ago 1 reply

Hi,  In my watermarking project, I detect edges and embed my watermark in high intensity regions of the edges in the host gray scale image. So...

Hi,  In my watermarking project, I detect edges and embed my watermark in high intensity regions of the edges in the host gray scale image. So the host image will be transformed into binary image while applying edge detection algorithm.Now my problem is how to reconstruct the binary edge detected image to the corresponding gray scale image. the code upto this is: image_1 = imread('lena.p...


plotting matrix to image

Started by S.KAMALESH VIVEK in Matlab DSP14 years ago 3 replies

hi friends, I need to plot a matrix data (2-Dimensional-MxN) stored in a variable (say a) to an image. i just used, size of a is 751x550 ...

hi friends, I need to plot a matrix data (2-Dimensional-MxN) stored in a variable (say a) to an image. i just used, size of a is 751x550 figure,imshow(a). But the image i got was scalled automatically to 56% as the system was unable to show the full size. Due to this the image gets compressed along the longitudinal axis.This prevents me in analysi


FFT and IFFT

Started by eddylamhk in Matlab DSP16 years ago

Hi, I want to ask if I FFT an image, how can I recover the image using IFFT. I try to use it directly, but turn out some a totally...

Hi, I want to ask if I FFT an image, how can I recover the image using IFFT. I try to use it directly, but turn out some a totally bright picture. However, when i change the image to a very simple one, say only black and whit region, ifft can receover the image. I find out from


Q on image processing......

Started by eagle_fox_2000 in Matlab DSP16 years ago

Hi ... i am working on an image processing stuff....and i am confused on how excatly can i get an impluse response of a...

Hi ... i am working on an image processing stuff....and i am confused on how excatly can i get an impluse response of a particular area of interest in the image. well i have figured out ways to reach the area of interest and get a secluded image of it out of the orginal


image rectification help

Started by tizianapace in Matlab DSP15 years ago

Hi all I am in urgent need of matlab code to perform image rectification (for computer vision). If you know of some sources...

Hi all I am in urgent need of matlab code to perform image rectification (for computer vision). If you know of some sources where I can get some code or if you want to exchange with me some code (I have developed image processing code including fft transforms, image sampling an


SVD Decomposition

Started by Nikhil Gupta in Matlab DSP10 years ago

Hello fellas, I'm working on digital Image watermarking algorithm through SVD decomposition with DWT2 transform. After some manipulation with...

Hello fellas, I'm working on digital Image watermarking algorithm through SVD decomposition with DWT2 transform. After some manipulation with the S matrix (now say s') when i recombine to get the image back(embedding) - on applying SVD again (during extraction) to the recombined image i don't get the same S matrix as s' . Moreover the final image becomes little truncated itself - i.e. the i...


segment image into same block size (3*3matrix)

Started by becool_hem in Matlab DSP11 years ago

hi all i hav an image and i want to segment that image into 3*3 matrix for further processing can anyone tell me the technique to solve my...

hi all i hav an image and i want to segment that image into 3*3 matrix for further processing can anyone tell me the technique to solve my problem thanks in advance


Question: spectral analysis [1 Attachment]

Started by Roberlanio Melo in Matlab DSP8 years ago

Through image = imread (image.tiff), then Y = fftshift applied (fft2 (image)). Viewed the spectrum through imshow (log (abs (A )),[]) as also by...

Through image = imread (image.tiff), then Y = fftshift applied (fft2 (image)). Viewed the spectrum through imshow (log (abs (A )),[]) as also by imshow (A, [0 100000]). The result of the spectrum has four points in the corners. Would anyone interpret this spectrum? Follow the link and the image obtained by FFT. https://plus.google.com/u/0/photos/114934434917061582852/albums/5665646538614...


Image Processing

Started by Yasir Aslam in Matlab DSP18 years ago

Hi Guys Well i have to determine the shape and size of a cell in an image in matlab i have simplified the image by finding the...

Hi Guys Well i have to determine the shape and size of a cell in an image in matlab i have simplified the image by finding the edges and now the image contains only the boundaries of cells . but now i have to determine the approximate size and shape of the cell. can anyone of you hel


gradient of an image

Started by ceg9901 in Matlab DSP15 years ago 1 reply

Hi, How to find horizontal and vertical gradidnet of an image.is there any command derivation of an image?. ...

Hi, How to find horizontal and vertical gradidnet of an image.is there any command derivation of an image?.


Prob in Image Processing

Started by Moniba Shams in Matlab DSP13 years ago

Dear All I ve a prob with a grey level image in double. When I apply some functions on the image for example IMVIEW and IMSHOW, the display...

Dear All I ve a prob with a grey level image in double. When I apply some functions on the image for example IMVIEW and IMSHOW, the display contains three images instead of one. Can anyone tell why is to so? If the files are required PL let me know. Regards Moniba _______________