Converting JPEG images into MAT format images

Started by naveen_anne in Matlab DSP16 years ago 1 reply

Hi all, Does anybody know how to convert a JPG image of size 1024X1024 to an image of MAT format in matlab? Anyhelp in this...

Hi all, Does anybody know how to convert a JPG image of size 1024X1024 to an image of MAT format in matlab? Anyhelp in this regard will be appreciated. Thanks Naveen


Downsample Matrix

Started by maxfoxchina in Matlab DSP17 years ago 1 reply

Hey folks, i do have a question about downsampling on matlab. There is an image of 400 x 400 points and i do need a matrix...

Hey folks, i do have a question about downsampling on matlab. There is an image of 400 x 400 points and i do need a matrix which downsamples the image to 200 x 200 points. I dont want to use the functions of matlab to resize it, just want to compute it by myself, or bett


image compression

Started by amel...@reseau.eseo.fr in Matlab DSP14 years ago

Hi, I m a student working on image compression. I m looking for matlab code for jpeg2000 compression ... or any other compression. Then I...

Hi, I m a student working on image compression. I m looking for matlab code for jpeg2000 compression ... or any other compression. Then I want to use a TMS320C6x. I think we can make a simulation with matlab and CCS... Is it really possible ? but how can I be sure that the dsp I chose corresponds to my needs ?? Thank you for your help.


PSNR value in matlab

Started by rukmanimohan04 in Matlab DSP15 years ago

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


difference between moving images

Started by jay19001901 in Matlab DSP17 years ago

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


RE: Re Image Processing

Started by SRINIVASAN Seetharaman in Matlab DSP19 years ago

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


PSNR

Started by Ramesh in Matlab DSP16 years ago

Hi,     I am doing some stuff on digital watermarking. I have an image, to which I embedd the watermark signal. I have to find...

Hi,     I am doing some stuff on digital watermarking. I have an image, to which I embedd the watermark signal. I have to find the peak signal -to noise- ratio of the image now. Is there any function in MATLAB that can accomplish this.   Regards.


multiframe image read

Started by ku daychyi in Matlab DSP18 years ago 1 reply

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


bwmorph --- Image processing problem

Started by Zahra A Shah in Matlab DSP17 years ago

i have to use bwmorph to fill 1-pixel white holes in a binary image. for that i use i = imread('img.bmp'); k =...

i have to use bwmorph to fill 1-pixel white holes in a binary image. for that i use i = imread('img.bmp'); k = bwmorph(i,'clean',Inf); These statements remove holes of the form: 0 0 0 0 1 0 0 0 0 But does not cater for holes like 1 0 0 0 1 0


Image Overlay

Started by michael_fivey in Matlab DSP18 years ago 1 reply

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.


Simulink/IP/C6x

Started by heidar mhr in Matlab DSP13 years ago

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


Read series of image files

Started by Wiseto Agung in Matlab DSP19 years ago

Dear all, I'd like to read several image files, e.g images1.bmp, images2.bmp, ... , imagesN.bmp. How can I read it...

Dear all, I'd like to read several image files, e.g images1.bmp, images2.bmp, ... , imagesN.bmp. How can I read it automatically using "for" loop ? Any suggestion is welcomed. Thank you very much, Seto


colormap function

Started by kimzdsp in Matlab DSP17 years ago 1 reply

Hi, Currently I am trying to use the Matlab to plot a spectrogram image. I want this image is based on the scaled spectrogram...

Hi, Currently I am trying to use the Matlab to plot a spectrogram image. I want this image is based on the scaled spectrogram data in dB with the 8-level "heat" color-encoding scheme, which is black, brown, blue, cyan, magenta, red, yellow and white. I have searched


Image Processing NNT

Started by Sobath Premaratne in Matlab DSP17 years ago

Hi everyone, I'm new to this group. Can anyone help me ? My problem is how to input images as training data and train a...

Hi everyone, I'm new to this group. Can anyone help me ? My problem is how to input images as training data and train a Neural Network using MATLAB's Neural Network Toolbox. Since an image is a matrix and not a vector how can I input one to a Neural


Wavelet compression

Started by Pavel Havranek in Matlab DSP19 years ago

Hi all, I work with MATLAB R11 on image compression by wavelets. I need compress ratio about 150 to 1 but MATLAB has worse result...

Hi all, I work with MATLAB R11 on image compression by wavelets. I need compress ratio about 150 to 1 but MATLAB has worse result after compresion as commercial product (LuraTech). I need compress image 176x176 to 256 numbers (char) but I don't know which coeficient I must save. I ca


Image Format (RGB)

Started by moacirponti in Matlab DSP17 years ago

Hi. I'm working on a project that includes multiespectral images (from a tomography scanner). The objective is identify...

Hi. I'm working on a project that includes multiespectral images (from a tomography scanner). The objective is identify materials in that images, using pattern recognition techniques. My PROBLEM: Matlab have an image format that handle 3 spectros (RGB), but my project ha


SOS!!!problem about the complexity of local area of an image

Started by uestcgao in Matlab DSP17 years ago 1 reply

Dear all, Hi! I am doing some research about the steganography in BPCS way created by a Japanese professor. BPCS means Bit...

Dear all, Hi! I am doing some research about the steganography in BPCS way created by a Japanese professor. BPCS means Bit Plane Complexity Segementation.It needs calculating the complexity of an image in advance. The concept of Complexity is defined as the following:


Surface fitting with Image

Started by sudeepchristoraj in Matlab DSP13 years ago

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...


medical image reconstruction (urgent)

Started by eddylamhk in Matlab DSP16 years ago

Dear all, I'm doing an assignment abt medical image reconstruction, according to the papers writing, Kaiser-Bessel Window seems...

Dear all, I'm doing an assignment abt medical image reconstruction, according to the papers writing, Kaiser-Bessel Window seems the best kernel for the gridding algorithm. However, a I in the equation whcihc is known as sthg relate to the Bessel Function, which i cannot handle


how can i delay the condition of for loop

Started by enas...@gmail.com in Matlab DSP13 years ago 1 reply

hi all i want to know how can i delay the i mshow(img) a period of time the the for loop display image 1 the stay a period of time then...

hi all i want to know how can i delay the i mshow(img) a period of time the the for loop display image 1 the stay a period of time then show image 2 ...etc for i = 1:7 str = strcat(int2str(i),'.jpg'); eval('img=imread(str);'); f=imshow(img); waitfor(f) end with regards Enas