Load image in form one-dimensional signal

How can I use the Matlab statement "s = leleccum(1:3920)" for any image rather than leleccum image? The number 3920, what it means please I need your help Arkan

Answer 1

[Walter Roberson]

Img = imread('ImageFileName.png');
s = Img(:) ;

Answer 2

[Image Analyst]

That takes an image called leleccum and stacks all columns on top of each other with col 1 at the top, then col 2 underneath that, then col 3 and so on. Then it extracts the first 3920 elements of that column vector into a new column vector. This may or may not be an exact integer number of columns.

To do it for an image of any other name, simple use the name of the other image.

For example to get the first 58 pixels in image "grayImage", do this:

s = grayImage(1:58)

[Walter Roberson]

Actually it is not an image, it is a 1x4320 double.

https://www.mathworks.com/help/wavelet/ref/waverec.html

[Image Analyst]

OK. I didn't know that because he called it an image and didn't say anything about wavelets or where that variable might have come from. I've added the Wavelet Toolbox to the product list above.

[Arkanra Kadhum]

Thank you so much for you important reply. My problem is to decompose the EMG image. When I write

EmgImg=imread('emg1.jpg');
s = EmgImg(1:3920); %Load original one-dimensional signal. 
l_s = length(s);
[C,L] = wavedec(s,3,'db1');

I get the warning

Warning: CONV2 on values of class UINT8 is obsolete.
         Use CONV2(DOUBLE(A),DOUBLE(B)) or CONV2(SINGLE(A),SINGLE(B)) instead.

Best regards

Arkan

[Image Analyst]

OK, so...did you do that? Did you convert your image to double like it said? If not, why not?