how to upsample an image?!

Started by Fatemeh Ardakani in Matlab DSP11 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...


Handling Large Image

Started by Najmus Sadat in Matlab DSP10 years ago

I am new in Matlab Image Processing. I cant read large images(2Kx2K) with imread function. Can any1 help me regarding this? sadat.

I am new in Matlab Image Processing. I cant read large images(2Kx2K) with imread function. Can any1 help me regarding this? sadat.


scaling an image

Started by gandhi mathi in Matlab DSP17 years ago 2 replies

hai, How can I scale an image and imshow it. mathi

hai, How can I scale an image and imshow it. mathi


color image

Started by Laiq Azam in Matlab DSP12 years ago 3 replies

Hello all, Does anybody have a simple code of reading and processing a color image in matlab, taking average of pixel (4 next pixels left and...

Hello all, Does anybody have a simple code of reading and processing a color image in matlab, taking average of pixel (4 next pixels left and right)..... I would appreciate any feedback.... Thanks. -- Laiq


Ridge frequncy estimation of fingerprint image for Gabor filter

Started by paria rahmani in Matlab DSP13 years ago

Hi.I'm working on fingerprint image enhancement & minutiae extraction,i don't know how to estimate ridge frequency of fingerprint image to...

Hi.I'm working on fingerprint image enhancement & minutiae extraction,i don't know how to estimate ridge frequency of fingerprint image to filtering by Gabor filter(in time domain not in frequency domain).if anyone can help me,please contact me. Thanks a lot.


Count Object In An Image !!

Started by Ahmad El-Saied in Matlab DSP14 years ago 3 replies

Hi all , Please i would like to know if anyone here knows an algorithm to indentify the number of objets in a given image ... for...

Hi all , Please i would like to know if anyone here knows an algorithm to indentify the number of objets in a given image ... for example a picture of cars in street Waiting for Suggestions !! Ahmad El-Saeed


Need info about image processing

Started by cesar acosta in Matlab DSP11 years ago

Hi everyone, i need any information about the basic aspect of image processing using matlab and simulink. If you could refer me a good free...

Hi everyone, i need any information about the basic aspect of image processing using matlab and simulink. If you could refer me a good free tutorial or book will be nice. regards, Cesar Acosta


Reg Image processing

Started by Yogesh Ganapathy in Matlab DSP14 years ago 1 reply

Hello friends, I am doing a project in lossless image compression. Do any of you have the coding in matlab for SPIHT algorithm or for...

Hello friends, I am doing a project in lossless image compression. Do any of you have the coding in matlab for SPIHT algorithm or for integer wavelet transform. If you know the source from where to get the code then pls mention the web address. Thanks Yours friendly, Yogesh


Is there any algorithm to produce glary effect on digital image.

Started by shashi kumar in Matlab DSP15 years ago 1 reply

hi there,           i am working in the field of image processing for past 6 months, rigth now i am stuck in the middle...

hi there,           i am working in the field of image processing for past 6 months, rigth now i am stuck in the middle of my project where in  it is required to produce a glare/ shining surfces in a dull digital image. please if any of u know t


Blurring an image

Started by sanguinettir in Matlab DSP16 years ago 1 reply

Hello, everybody... I would like to know how I can blur an image using matlab. Is there any pre-existing command to perform it?...

Hello, everybody... I would like to know how I can blur an image using matlab. Is there any pre-existing command to perform it? Thanks in advance.. Ralph


GUI -- HOW TO Get a dynamic filename based on input filenames - MATLAB GUI

Started by vishwa in Matlab DSP12 years ago 1 reply

Dear Sir/friends I have a GUI for image processing. In that I have TWO push buttons for loading two images. Third push button for CALCULATE...

Dear Sir/friends I have a GUI for image processing. In that I have TWO push buttons for loading two images. Third push button for CALCULATE (histogram) Here I should have an option of saving the set of two input images, resulting histogram data as a .MAT file for later retrieval. The file name should be = cocatenation of the two image file names (since I may use any image pairs) I used ...


Image Encryption by logistic map and Error Concealment

Started by saad abuguba in Matlab DSP12 years ago

Hi All, Anyone got idea about image encryption by using logistic map and code of error concealment based on DWT image. Please help!

Hi All, Anyone got idea about image encryption by using logistic map and code of error concealment based on DWT image. Please help!


Dividing an Image into 3x3 Matrix

Started by jawaad aslam in Matlab DSP11 years ago 3 replies

Hello All, ? Hope everyone is fine and going smoothly. I raised the same querry before but didnt get the desired reply from you. Actually I am...

Hello All, ? Hope everyone is fine and going smoothly. I raised the same querry before but didnt get the desired reply from you. Actually I am working on Fingerprints Recognition. I tell you in detail please go through it carefully. ? Lets suppose I have a fingerprint Image and after converting it into binary form I get the result as follows: ? 1 0 0 1 1 1 0 0 1 0 0 1 0 1 1........ ? 0 0 1...


Raw data to image format conversion

Started by anujack_21 in Matlab DSP16 years ago 1 reply

Hi all, Can a raw data file be stored as an image file without any loss? I read a raw data file into matlab using fread...

Hi all, Can a raw data file be stored as an image file without any loss? I read a raw data file into matlab using fread command( the file size is around 35MB and is 12 bit precision).When I used imwrite to save this raw data file to an image file, there was loss of data


importing images into matlab

Started by m5eedat in Matlab DSP12 years ago

How can i wirte a matlab function to load image data into matlab. The image is in XRI format?

How can i wirte a matlab function to load image data into matlab. The image is in XRI format?


windowing a 2-d signal

Started by manxyzt in Matlab DSP10 years ago

can you help me about windowing a 2-d signal.. i want to window this data with Hanning window.. the data is 64x64 ISAR radar's...

can you help me about windowing a 2-d signal.. i want to window this data with Hanning window.. the data is 64x64 ISAR radar's backscattered data.. when i have an image by IFFT2 .. the image has unwanted sidelobes.. so i think if i can window this data i will have a better image.. do you have any idea about that?? how can i window 2-d signal?? thanks for help..


Colored image

Started by lowtechorhightech in Matlab DSP14 years ago 3 replies

Please explain how to obtain the hue of a colored image in MATLAB

Please explain how to obtain the hue of a colored image in MATLAB


Image restoration

Started by \Valeria Leite\ in Matlab DSP14 years ago

Dear all, Someone has a Matalab code for image restoration? Best regards, Valeria

Dear all, Someone has a Matalab code for image restoration? Best regards, Valeria


gray scale image

Started by Laiq Azam in Matlab DSP12 years ago

Hello all, I m trying to use imread command to read a jpg file. When I use image command to show the matrix, it gives me color, although the...

Hello all, I m trying to use imread command to read a jpg file. When I use image command to show the matrix, it gives me color, although the file I read was gray scale. Even with imshow, it shows weird colors, any help?????? A=imread('babby.jpg'); image(A) figure; imshow(A); title('Original Picture'); -- Laiq


3D DCT of a image

Started by suganya boopathy in Matlab DSP16 years ago

Hello,   I am involved in a project work on image compression. I want to get an image and find 3D DCT (8x8x8 block). Tell me...

Hello,   I am involved in a project work on image compression. I want to get an image and find 3D DCT (8x8x8 block). Tell me how to get a sequence of 8 images and find DCT.   Thankyou, Suganya