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Scotland on Rails videos are up

by cory on June 3rd, 2009

Here’s mine, from my talk “Who Needs Photoshop? Creative Image Manipulation in Ruby.” This was my first time speaking at a conference. Do I look as nervous as I felt?

Who Needs Photoshop? at Scotland on Rails from bantic on Vimeo.

Engineyard is hosting the rest of the Scotland on Rails videos.

From → ruby, travel, video

  • your gem was the only one I was ever able to install. I do appear to have openCV running now with your GEM however when running through the face detection.

    Thanks and Regards
  • much like 10 worth
  • Hey Cory,
    I was trying to follow along with your presentation and get the openCV stuff working. Thank you for the excellent instructions in your repo, your gem was the only one I was ever able to install. I do appear to have openCV running now with your GEM however when running through the face detection example you have in your repo I get this error:


    OpenCV::CvStatusBadFlag: Unrecognized or unsupported array type

    method detect_objects in face_detect.rb at line 15
    at top level in face_detect.rb at line 15

    Have you seen something like this before, does this indicate that I don't have everything installed correctly?

    Thanks!

  • Hey Mark, I don't remember seeing that particular error. Can you pastie a
    stacktrace?
  • Hi Cory,
    I'd like to give you a bigger stack trace but it appears to only give me this:

    face_detect.rb:15: warning: OpenCV error code (-206) : cvGetMat (2882 in cxarray.cpp)
    face_detect.rb:15:in `detect_objects': Unrecognized or unsupported array type (OpenCV::CvStatusBadFlag)
    from face_detect.rb:15


    What I can tell you is that the application starts and shows a white box on the desktop, and the green light for the isight becomes active. However, nothing happens until I press a key. Once I do press any key I get that error.

    Is that helpful at all? Do you know how I can produce a proper stack trace for you?

    Thanks for trying to help!
    Mark
  • If that is your first time as a public speaker you did great! I used to have to do this in front of hundreds of people about once a month. God I would get so nervous!
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