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You're reading from  iOS Application Development with OpenCV 3

Product typeBook
Published inJun 2016
Reading LevelIntermediate
PublisherPackt
ISBN-139781785289491
Edition1st Edition
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Author (1)
Joseph Howse
Joseph Howse
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Joseph Howse

Joseph Howse lives in a Canadian fishing village, where he chats with his cats, crafts his books, and nurtures an orchard of hardy fruit trees. He is President of Nummist Media Corporation, which exists to support his books and to provide mentoring and consulting services, with a specialty in computer vision. On average, in 2015-2022, Joseph has written 1.4 new books or new editions per year for Packt. He also writes fiction, including an upcoming novel about the lives of a group of young people in the last days of the Soviet Union.
Read more about Joseph Howse

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Using the application for practical purposes


Although LightWork's design and algorithms are rather simple, it is a versatile tool in the hands of a crafty user. For example, with the use of our blending filters, we can accomplish any task in the following broad categories:

  • See how a scene has changed over time

  • Before actually building or moving an object, visualize how it would look in a scene

  • Before actually copying a document or drawing, visualize how it would look on a different surface

Let's consider each category in pictures.

Seeing changes in a scene

This requires a few steps of preparation:

  1. Set up the smartphone or tablet in a stable position. For example, mount it on a tripod.

  2. Point the camera at an area where you expect movement to occur.

  3. Open the LightWork app, activate the rear-facing camera, and save a picture.

  4. Click on Blend Src and select the picture that you just saved.

  5. Click on Blend Mode and select Average, Screen, or Multiply.

  6. Watch the live video to see a blend of the past and present...

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iOS Application Development with OpenCV 3
Published in: Jun 2016Publisher: PacktISBN-13: 9781785289491

Author (1)

author image
Joseph Howse

Joseph Howse lives in a Canadian fishing village, where he chats with his cats, crafts his books, and nurtures an orchard of hardy fruit trees. He is President of Nummist Media Corporation, which exists to support his books and to provide mentoring and consulting services, with a specialty in computer vision. On average, in 2015-2022, Joseph has written 1.4 new books or new editions per year for Packt. He also writes fiction, including an upcoming novel about the lives of a group of young people in the last days of the Soviet Union.
Read more about Joseph Howse