The warped image is equal to the transformation of the source image to the destination by the homography matrix h. Hi Satya, I would like to thank you for this sample, and i appreciate the way to explain homography. Shows the first image uploaded to the internet. After reading this post you probably have an idea on how to put an image on a virtual billboard. The four corners of the ad serve as the source points.Ī homography is calculated based on these four corresponding points and it is used to warp the ad into the video frame. In these applications the four corners of the advertisement board are detected in the video which serve as the destination points. Instead of displaying the same ad to everybody, advertisers can choose which ads to show based on the person’s demographics, location etc. In soccer and baseball the ads placed on small advertisement boards right outside the boundary of the field can be virtually changed. Virtual Billboard In many televised sports events, advertisement in virtually inserted in live video feed. You can the code and images used in this post by subscribing to our newsletter.
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