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.. _ezb_vision:

Computer Vision
=============================

This project will officially enter the field of computer vision!


.. note:: 
    
    You can read :ref:`ezblock:video_latest`. Come and carry out this project smoothly.


**Program**

.. note::

    * You can write the program according to the following picture, please refer to the tutorial: :ref:`ezblock:create_project_latest`.
    * Or find the code with the same name on the **Examples** page of the EzBlock Studio and click **Run** or **Edit** directly.


.. image:: img/sp210928_165255.png
    :width: 800

Switch to the Remote Control interface, and you will see the following widgets.

.. image:: img/sp210928_165642.png

After the program is running, you can switch the slider widget to turn on/off the face detection; click the D-Pad to select the color of the detection; click the button to print the detection result.

**How it works?**

.. image:: img/sp210928_170920.png

This block is used to enable the camera module.

.. image:: img/sp210928_171021.png
    :width: 400

These two blocks are used to enable the face detection/color detection function.

.. image:: img/sp210928_171125.png
    :width: 400

These two blocks are used to output information. The detection result has five output values, namely coordinate x value, coordinate y value, width, height, and number.