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11 Posted Topics
 | Can anyone please explain to me how to compute DCT? I'm finding it hard to understand it.   I attached the formulas the Discrete Cosine Transform (DCT) and it's Inverse-DCT. |
| | #include <iostream> #include <vector> using namespace std; template< typename T > using matrix = vector< vector<T> > ; I saw this code snippet while searching for templates. I was wondering why there's a word "using". What is it for? Thanks :) |
| | Does anyone know the equivalent version of cvCreateImage in c++. I tried googling it but no luck. Thanks!!!  |
| | Can anyone discuss how to convert a jpeg color image into binary using OpenCv and C++. I find it hard understanding it on my own. I found sample programs but that really doesn't help much if I don't understand the meaning of every line of code. At least a step … |
| | Does anyone know the process of DCT in relation to image watermarking? Finding it hard to understand the process any help would be appreciated.  |
| | Is it necessary to compress the host image after embedding the watermark?My host image (512 x 512) is bmp and the watermark is a binary image (63 x 63).  |
| | The first step in image watermarking using DCT is to divide the image into 8 x 8. My question is do I have to divide the image as a whole or divide them by RGB channels so that for each channel I will divide them by 8x8. Any comments will … |
| | Hello everyone and good day!!! I'm trying to embedd an image watermark to another image for copyright protection and I plan to use DCT and embedding the watermark in the middle band coefficeint of the host image. The problem is I don't know which of the formulas to use since … |
| | I'm curios what happens to the size of the host image after an invisible watermark has been inserted. I'm guessing the size will increase but by how much? For example, the cover image to be inserted is 1kb and the host image is 2kb. Since your adding additional information the … |
| | Which of the two (Binary Image and Gray scale image) is easier to embed in a color image using Discrete Cosine Transform? I'm currently exploring image watermarking using discrete cosine transform. Thanks in advance!!! :) |
| | Is it possible to embed a colored image to another image using DCT? or does DCT support embedding gray scales and binary formats only? |
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