Airtest图像识别原理_airtest find_template

AirtestIDE 是一个跨平台的UI自动化测试编辑器，适用于游戏和App。

• 自动化脚本录制、一键回放、报告查看，轻而易举实现自动化测试流程

• 支持基于图像识别的Airtest框架，适用于所有Android和Windows游戏

• 支持基于UI控件搜索的Poco框架，适用于Unity3d，Cocos2d与Android App

一句话总结：我们推出了两款基于Python的UI自动化测试框架Airtest（用截图写脚本）和Poco（用界面UI元素来写脚本），可以用我们提供的AirtestIDE来快速编写你的自动化测试脚本~

本文重点是针对Airtest中的图像识别进行代码走读，加深对图像识别原理的理解

1、准备工作，下载好源码 https://github.com/AirtestProject/Airtest

2、我们从最简单的touch方法入手，即为点击某个传入的图片，源码在api.py里面

@logwrap
def touch(v, times=1, **kwargs):
    """
    Perform the touch action on the device screen
 
    :param v: target to touch, either a Template instance or absolute coordinates (x, y)
    :param times: how many touches to be performed
    :param kwargs: platform specific `kwargs`, please refer to corresponding docs
    :return: finial position to be clicked
    :platforms: Android, Windows, iOS
    """
    if isinstance(v, Template):
        pos = loop_find(v, timeout=ST.FIND_TIMEOUT)
    else:
        try_log_screen()
        pos = v
    for _ in range(times):
        G.DEVICE.touch(pos, **kwargs)
        time.sleep(0.05)
    delay_after_operation()
    return pos
 
click = touch  # click is alias of touch

 这个函数执行点击操作的是 G.DEVICE.touch(pos, **kwargs)

而pos就是图片匹配返回的坐标位置，我们重点看loop_find这个函数

@logwrap
def loop_find(query, timeout=ST.FIND_TIMEOUT, threshold=None, interval=0.5, intervalfunc=None):
    """
    Search for image template in the screen until timeout
 
    Args:
        query: image template to be found in screenshot
        timeout: time interval how long to look for the image template
        threshold: default is None
        interval: sleep interval before next attempt to find the image template
        intervalfunc: function that is executed after unsuccessful attempt to find the image template
 
    Raises:
        TargetN