Qt中的基本图像处理，如何将图像分解为数组，准备对其执行傅立叶变换？

Question

I am trying to do some very basic, but ridiculously cool, image processing with Qt (I have to use Qt, no Matlab allowed). I need to load a black and white image (Already done) and then perform a Fourier transform on it which I then display. The next step I'm looking at is filtering out some high frequencies, reverse transform and see what the results look like.

I assume that the starting point to this is breaking up the image into an array of discrete values in the spatial domain.

Does anybody have any experience in doing what I am describing? Do you guys agree with the array approach? Do I need a fancy library, or is it going to boil down to a numerical approach with various loops transforming each pixel?

I am a bit of a noob in Qt so it would be awesome of you could keep it simple.

Answer 1

Just load your picture into a QImage object. With the pixel method you will get the pixel value in RGB at position x,y. Using qGray(int r, int g, int b) will give you the grey value (0-255). For FFT, just take a look at numerical recipes .

Answer 2

Refer to this link

https://codereview.stackexchange.com/questions/20529/slicing-up-an-image-into-rows-and-columns-in-java

you have to just change the image location as

GridImage image = new GridImage("img/card-grid-image-mass-effect.jpg",4, 15);

change File Name . then comile and execute code