June 2019
Intermediate to advanced
348 pages
8h 28m
English
Content preview from Qt 5 and OpenCV 4 Computer Vision Projects
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About real time
When we handle videos, either video files or real-time video feeds from cameras, we know that the frame rate of the videos is about 24-30 FPS in general. That means we have 33-40 milliseconds to process each frame. If we take more time than that, we will lose some frames from a real-time video feed, or get a slower playing speed from a video file.
Now, let's add some code to our application to measure how much time we spend on each frame while detecting objects. First, in the Detective.pro project file, we add a new macro definition:
DEFINES += TIME_MEASURE=1
We will use this macro to switch the time-measuring code on or off. If you want to turn off the time measuring, just comment this line out, then rebuild the application ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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