Joseph Howse's Android Application Programming with OpenCV PDF

By Joseph Howse

Take a phone out of your pocket, and inside of a number of seconds, you could snap a photograph, manage it, and percentage it with the area. you've simply accomplished mass construction of photo information. With a working laptop or computer imaginative and prescient library reminiscent of OpenCV, you could learn and rework copious quantities of photograph information in actual time on a cellular machine. The upshot to this can be that you simply, as builders, offers cellular clients with many new sorts of pictures, continually highlighting definite visible positive aspects which are of creative or sensible curiosity. Android is a handy platform for such experiments since it makes use of a high-level language (Java), it offers standardized interfaces for sharing snapshot facts among functions, and it really is as a rule open resource, so each person can research its implementation.

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We should be able to browse its contents in the Package Explorer pane. Let's remove and add some files, according to the following steps: 1. xml. ) The layout of our interface will be very simple, so it will be more convenient to create it in Java code instead of this separate XML file. However, if you do want an example of using OpenCV with an XML layout, you may refer to the sample apps that come with the library. See the Building the OpenCV samples with Eclipse section in Chapter 1, Setting Up OpenCV.

Info Setting Up OpenCV 3. 2 or less). Enable the USB debugging option. Now, open the Play Store app, and find and install the OpenCV Manager app. ) OpenCV Manager takes care of checking for any OpenCV library updates when we run any OpenCV applications. html. Now, we must prepare our main computer for communication with the Android device. The required steps vary, depending on our operating system. On Windows, we need to install the proper USB drivers for the Android device. Different vendors and devices have different drivers.

The communicating activities may be in different applications. An intent may contain key-value pairs called extras. html. LabActivity declares several public constants that are used by it and CameraActivity. These constants relate to images' metadata and to the extra keys that are used when CameraActivity and LabActivity communicate via intents. LabActivity also has member variables that are used to store the URI and path values, extracted from the extras. The onCreate() method does the work of extracting these values and setting up an image view that shows the PNG file.

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