title: Are Wavelet Coefficients simply the pixel values of decomposed image in 2D Discrete Wavelet Transform
body: <p>I've been working with Discrete Wavelet Transform, I'm new to this theory. I want to access and modify the wavelet coefficients of the decomposed image, Are those wavelet coefficients simply the pixel values of the decomposed image in 2D DWT?</p>
  
  <p>This is for example the result of DWT Decomposition:
  <a href="https://i.stack.imgur.com/fnVeJ.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/fnVeJ.png" alt="enter image description here"></a></p>
  
  <p>So, when I want to access and modify the Wavelet Coefficients, can I just iterate through the pixel values of above image? Thank you for your help.</p>