Sobel Method Edge Detection

So after much effort, i finally got basic edge detection to work. It uses Sobel edge detection, which is a classic first order detection operator. It convolutes a 3*3 matrix with template pixel to calculate the magnitude of the edges. Its my first attemp to use matrix image processing. I did try it using Matlab in college(ohhh those Halcyon days, when i could do what i want). But it was really simple. I use DWT to achieve it. Its much more sophisticated, but again its complicated, if you try to implement it from scratch. I dont know what i did this, but its a good break from creating server side business logic that validates and balance ledger.....
Here are the results-->

Edge Detected

Orig Image