Dears Matlab users. Hi: I want to know how could I know the number of rows and colums of an image. I mean, I select with some...

Dears Matlab users. Hi: I want to know how could I know the number of rows and colums of an image. I mean, I select with some function the element (x,y) of a matrix and I want to know the values of x and y (the row and the column that these values represents). What is the func

Hai, how can I get the magnitude of the FFT of an image. gandhi

Hai, how can I get the magnitude of the FFT of an image. gandhi

Good everyone, I am working on face recognition. I need your help on how to normalize an image to zero mean and unit variance in MATLAB. In...

Good everyone, I am working on face recognition. I need your help on how to normalize an image to zero mean and unit variance in MATLAB. In addition, I will also appreciate simple explanation on it. Thank you very much. Lijing

Hi I need your help, can anyone tell me how I could recover the original image from a filtered one knowing the filter impulse...

Hi I need your help, can anyone tell me how I could recover the original image from a filtered one knowing the filter impulse response and using the fft2 matlab function. regards Pedro Pedrosa

Perhaps any of you has been dealing with this issue that has stopped me for some time. I have built a spline approximation to...

Perhaps any of you has been dealing with this issue that has stopped me for some time. I have built a spline approximation to an image, thus giving me a surface representation. I must do operations with this spline-approximated image and its gradient (sum, prod), in order to i

I am using the cpselect function in order to identify certain points in two images. I then try to transform these images with...

I am using the cpselect function in order to identify certain points in two images. I then try to transform these images with a linear conformal mapping. My trouble is this: the two images are slightly shifted in the x and y dir. When using the tool box I can only seem

hai friends, can any one from our gruop help me in writing code for "Sum and difference histograms of an image" , so that i can caluculate...

hai friends, can any one from our gruop help me in writing code for "Sum and difference histograms of an image" , so that i can caluculate the features like ENTROPY, CONTRAST, HOMOGENITY,CORRELATION etc., And also please let me known whether this approach is better when compared with CO-OCCURRENCE MATRIX. with regars: Raghav

hi I have been working ona video watermarking code, in which i have used some image processing functions of image processing...

hi I have been working ona video watermarking code, in which i have used some image processing functions of image processing toolbox. Everything works fine as a matlab .m file, but if I compile the program into a .C executable file., then it gives the follwing er

Hai everybody, I am trying to register two color images(one is the reference and the other is the rotated as well as shifted and...

Hai everybody, I am trying to register two color images(one is the reference and the other is the rotated as well as shifted and scaled) using Log polar transform.Here is the algorithm: I first converted the color to gray scale image Then applied fourier transform

hi, I want to know if there is any optimal value for the parameter PSNR. I hav implemented an algorithm for datamarking in which...

hi, I want to know if there is any optimal value for the parameter PSNR. I hav implemented an algorithm for datamarking in which for a message embedd of 629 bytes in a bmp image,a psnr value of 68db is obtained and for a message embed of 4.43kb inside the same image, the psnr value is 49 db.I am a bit confused regarding this. Can the PSNR

Hi , I am new to matlab programming, may be this question might be very funda, but i want to know, I created image of size...

Hi , I am new to matlab programming, may be this question might be very funda, but i want to know, I created image of size 50x50 but it says "index is outof size in" "if (double(im(x1,y1)) ==1)" can anyone clarify me how this line acts or what

Alright, Does anyone have any idea on how to overlay two images in MATLAB so that they are able to be registered. i.e. so that...

Alright, Does anyone have any idea on how to overlay two images in MATLAB so that they are able to be registered. i.e. so that a histogram can be taken of the image content of the two images when combined as opposed to a histogram being taken of the two images seperately.

Hello guys, I have an image processing algorithm running on a C6416 DSP board and now I want to build a simulink model to read an image and...

Hello guys, I have an image processing algorithm running on a C6416 DSP board and now I want to build a simulink model to read an image and give me its dimensions and feed it into my program on the board. Could someone please tell me if that is possible and maybe provide me with the simulink model. Thanks in advance. Haidar

Hello! I want to convert uint16 data to uint8 data. I try with uint8 function but it returns only 255. Ok i understand, what is more than 255...

Hello! I want to convert uint16 data to uint8 data. I try with uint8 function but it returns only 255. Ok i understand, what is more than 255 in original image (uint16) rounds to 255. Is there any function that does also rescaling data from range [0 65535] to [0 255]. Thank you!!! Marko

HI, I would appreciate some help.... I am trying to write a program in MATLAB that will segment moving objects, for example cars, from a...

HI, I would appreciate some help.... I am trying to write a program in MATLAB that will segment moving objects, for example cars, from a series of images (extracting each frame from a video) and that superimposes on each object its bounding box. Has any one got an idea? The images are RGB. and the bounding boxes must be seen on the RGB image not binary or grayscale.

Hi all, I would be glad to know how to do Surface fitting for the following situation... I have a gray scale image with...

Hi all, I would be glad to know how to do Surface fitting for the following situation... I have a gray scale image with range or intensity z(x,y) and to compute the noise variance at each pixel P, i must first perform a Least-Square Plane Fitting in the 3-by-3 neighborhood of P with a ready-made plane with equation z=Ax+By+C. Now this is where the problem is!! I dont k...

Hi Friend, any one have any idea how to make this thing work's i want to initialize an 4 D array and just using imread, as this...

Hi Friend, any one have any idea how to make this thing work's i want to initialize an 4 D array and just using imread, as this code mention but i didn't success to make run all the time give me this message: ??? Invalid TIFF image index specified. % Initialize an

Hi, I am a newbie to matlab, and i have a question: 1. how do i compare two moving images (.tif format) and find where a spot...

Hi, I am a newbie to matlab, and i have a question: 1. how do i compare two moving images (.tif format) and find where a spot in one image occurs in the other image. 2. the intensity and brightness of the images varies with time, and how do i plot a grpah of this wrt ti

hi, Can anyone kind kind enough mail the following 2 files from the Image Processing Toolbox 4. bwtraceboundary.m ...

hi, Can anyone kind kind enough mail the following 2 files from the Image Processing Toolbox 4. bwtraceboundary.m bwboundaries.m thnx __________________________________

Hi all, Is there any one who knows how inserting image in a matlab gui ? Thanks for help. Regards, leila.

Hi all, Is there any one who knows how inserting image in a matlab gui ? Thanks for help. Regards, leila.