Matlab

Since I'm an engineer.... Therefore I should blog about something educative, something like Matlab perhaps? Haha... Just a lame post anyway, showing you all what's this year engineering matlab project is about...

Well, this year, we're doing a study of human gait... Please don't ask me for any further details in it as this is a field of biomedical engineers, which i'm nowhere near of... Haha...

The project starts something like this:

1. You need to capture frame in a movie file(.avi file) and display it to the user. Some further explanation: Movie files are actually consists of multiple shots of photo over a very short time span.. An example will be using the burst mode photo taking or so called best pic in sony camera and take some continuous photos, and flip through those photos very quickly. You'll notice that the person is actually moving.. Haha... Bad and lengthy explanations. Sorry for that. Anyway, here's what it looks like initially for the program: Well, the user will be given a chance to actually set the width and height of the frame. But I won't go too detail about that.

2. Next, the user will move through the frame by pressing enter, or b+ enter to move backwards.... Once the user found a lengzai position, he'll grab the picture like this:

Notice the cursor there? The user will select a centre point of the man and a point above the man's head to crop the image out, and change it to gray scale.

3. When the image is cropped out, the user will be asked whether he's satisfied with the cropped image or not. If he does, he'll need to identify which run and which state is the picture in. Some further explanation: This avi file consists of 2 run, aka 2 walking cycle. Within 2 walking cycle, there's always 5 different state, such as pulling your leg up, when your leg just touches the floor and so on.. Yea, pretty much like that....

The occurence of those states will be plot in a separate graph. From the graph, you can roughly read that state 5 will occur twice, both in frame 45 and frame 80.

4. Finally, some calculation will be done and the data will be written into an ascii file. Hmm.... Just imagine that as a normal notepad file to write data in.. haha