CREU Project Blog


Final Report
May 24, 2008, 7:07 pm
Filed under: Uncategorized

Attached is a final report that we submitted.  Although we came across a lot of unexpected problem during the past year, it was regardless a great learning experience for all of us.  We were able to experiment with different technologies that are not taught in the classrooms. The report can be downloaded here. CREU Final Report

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Demo Program
May 24, 2008, 7:03 pm
Filed under: Uncategorized

We decided to write a program to demonstrate how this could be used.  We somehow decided that we would write a program that is sort of like the Yamaha TENORI-ON.  It has a 16×16 button matrix, and the buttons that can be activated to play different notes.  

Figure 1. When the program starts up, user should press “s” to enter a screen that shows the segmented image from the camera.  Users then click on the color they want to the program to track.  A cursor in the form of a square box will appear immediately, and it’s position on the screen will correspond to the location of the color blob.

Figure 2.  Users should press “s” to exit the setup screen.  The main application screen will appear, and user can select the button by moving the red cursor on the button and press “enter”.  

We were experimenting with button press by moving the color finger wrap toward the screen.  However, when the finger moves toward the screen, the position of the blob changes and it becomes difficult for users to select the button they originally wish to click.  However, I think that it can be done, if we get to experiment with it a little more.  But here is the source code for the application SequencerDemo.pdf. (Note: wordpress does not allow users to upload zip file; so I renamed it to SequencerDemo.pdf.  To unzip the source code, rename it to SequencerDemo.zip) 



Blob Detection Demo
May 16, 2008, 3:50 pm
Filed under: Uncategorized

This is one of the earlier demo we wrote to experiment with blob detection.  The program uses the camera on the macbook or the Logitech webcam to capture images and track color blobs specified by the user.  After the program started, user can click on the color they want to track in the application window and the program will track blobs of that color and calculate the size of the blobs.

Blob tracking might at first seems like a trivial task; it was a lot more difficult than we previously anticipated.  The program picks up noises from the environment and it returns irrelevant blobs from time to time.  We try to overcome this by smoothing and performing segmentation on the image prior to searching for the color blobs.  The program is still prone to error if the color is too similar to the background color, the blob is too small or the lighting condition changes.  The source code can be downloaded here .  (Note: wordpress doesn’t allow user to upload zip file, so I renamed it to BlobDetectionDemo.pdf.  To decompress the source code, you have to change the file name to BlobDetectionDemo.zip.)

 

Figure 1. A screen shot of the program tracking a color finger wrap.  It puts a red box around of finger wrap and provide a label indicating its size.

Figure 2. We find that the size label increases quadratically as we move the finger closer to the camera.

 



Meetings of the Mind
May 16, 2008, 3:50 pm
Filed under: Uncategorized

We presented our project’s poster at the meetings of the mind hosted by Carnegie Mellon University’s Undergraduate Research Organization.  Here is the pdf for the poster.