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Image Recognition based on defined images

Started by Prasun Dhara in Matlab DSP16 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 ...


please help me..with save code

Started by enas...@gmail.com in Matlab DSP19 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 DSP18 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...


Re: image signatures

Started by Euphoria Stone in Matlab DSP20 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


Modifying Bits in an image - Need Urgent Help

Started by msnustian in Matlab DSP19 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 ...


reading a 32 bit geotiff image

Started by avinash_uv in Matlab DSP19 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...


how to upsample an image?!

Started by Fatemeh Ardakani in Matlab DSP17 years ago

hi everybody i have problem upsampling an image! this is my...

hi everybody i have problem upsampling an image! this is my code: image_1=image(:,:,1); image_2=image(:,:,2); image_3=image(:,:,3); image_1_up=upsample((upsample(image_1,2))',2)'; image_2_up=upsample((upsample(image_2,2))',2)'; image_3_up=upsample((upsample(image_3,2))',2)'; image_up(:,:,1)=image_1_up; image_up(:,:,2)=image_2_up; image_up(:,:,3)=image_3_up; imshow(image_up) but it...


Using kmeans for an image - urgent help needed

Started by sure...@gmail.com in Matlab DSP19 years ago

hi, I am a beginner to Matlab. need help in using kmeans in matlab. I have an image. lets take Lena.jpg img=imread('Lena.jpg'); [h s...

hi, I am a beginner to Matlab. need help in using kmeans in matlab. I have an image. lets take Lena.jpg img=imread('Lena.jpg'); [h s v]=rgb2hsv(img); //here i get h=Hue, s=Saturation and v=intensity of the image now, how can i call kmeans function for h , s,v separately, what parameters to be passed. here h is 512*512 matrix. and how can i construct the clustered/segmented image...


Question: spectral analysis [1 Attachment]

Started by Roberlanio Melo in Matlab DSP15 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...


SVD Decomposition

Started by Nikhil Gupta in Matlab DSP16 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...


about using an output image in another program as input.

Started by ali_khodaie2002 in Matlab DSP17 years ago

hi, i have 2 different program.i want to use the output image of first program as input image for the second program. image is 512*512.but when...

hi, i have 2 different program.i want to use the output image of first program as input image for the second program. image is 512*512.but when i want to save it it`s size increase to 1024*623. so i can`t use it. can you help me?


how can i takt wavelet transform from an image and then inverse(transform) it ?

Started by ali_khodaie2002 in Matlab DSP17 years ago 1 reply

hi my dear freinds around the world, i wanted to transform(dwt) an image(barbara)and inverse it.it is my first time i have worked with dwt.these...

hi my dear freinds around the world, i wanted to transform(dwt) an image(barbara)and inverse it.it is my first time i have worked with dwt.these are my codes: X=((imread('barbara.bmp'))); [cA,cH,cV,cD] = dwt2(X,'haar'); Y = idwt2(cA,cH,cV,cD,'haar'); figure,imshow(Y) but the resulting image isn`t like the first image . what `s wrong with my codes? thanks in advance.


Re: Batch Image Processing

Started by cole...@gmail.com in Matlab DSP17 years ago

What if the my images numbering is this format DSC_001, DSC_002,......DSC_500? how do I write alter the code to suit this? skeleton of the code...

What if the my images numbering is this format DSC_001, DSC_002,......DSC_500? how do I write alter the code to suit this? skeleton of the code shud b something like this for i = 1 : 500 fname = [pic num2str(i)]; image = imread(fname,'bmp'); % do contrast enhancement% imwrite(image,fname,'bmp'); end > > Hi, > > I have a specific problem in Image Processing. I have an i


drawing on the image

Started by swamigmv in Matlab DSP19 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 bands in matlab

Started by nourhan_breem in Matlab DSP19 years ago

hello if anyone can help me in specify image bands using matlab, plzzz replay as soon as possible this is my image registration algorithm...

hello if anyone can help me in specify image bands using matlab, plzzz replay as soon as possible this is my image registration algorithm in which step 8 is related to image band 1. Apply FFT to images I1 and I2 ? F1(x, h) and F2(x, h); 2. Compute the absolute values of F1(x, h) and F2(x, h); 3. Apply a high pass filter to the absolute values to remove low freque...


Binary image

Started by k.al...@surrey.ac.uk in Matlab DSP19 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


image processing using matlab

Started by harishnrn in Matlab DSP20 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


Texture Mapping onto the Mesh

Started by Frederick in Matlab DSP20 years ago

Hi, Given an image and a mesh, how do I map the image on to the mesh by matlab assumed that the texture mapping is known? The things are...

Hi, Given an image and a mesh, how do I map the image on to the mesh by matlab assumed that the texture mapping is known? The things are known: the 3D points the triangular mesh the image the correspondence between the image pixels and points Is there any commands in MATLAB doing the texture mapping? Please give me a short example. Thank you for your help. Regrd, fred


getting a picture in C

Started by suganya boopathy in Matlab DSP23 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


FFT and IFFT

Started by eddylamhk in Matlab DSP23 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