lecture11 - CSE 471 Media Processing and Multimedia...

Info icon This preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
1 CSE 471 Media Processing and Multimedia Compositing Combining two or more images to make a new image Focus: Chromakeying The Art and Science of Digital Compositing , Ron Brinkmann, Morgan Kaufmann, 1999
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
2 CSE 471 Media Processing and Multimedia What we want to do… Matte – An image that determines how two images are to be mixed Values range from 0 to 1 0: All of image A 1: All of image B C O = (1- α )C A + α C B Computer people call these “alpha maps”
Image of page 2
3 CSE 471 Media Processing and Multimedia Terms from the bis... “Pulling a matte” – Extracting a matte from an image Static matte – A fixed matte for a still image. Can even be hand-painted Traveling matte – Matte sequence from an image sequence Animation
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
4 CSE 471 Media Processing and Multimedia Luma-keying Keying based only on the image luminance α = a 1 c α is clamped to [0., 1.] Think of this shorthand as: 2200 α( x,y) = a 1 c(x,y)
Image of page 4
5 CSE 471 Media Processing and Multimedia Lumi-keying
Image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
6 CSE 471 Media Processing and
Image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern