Python OpenCV – namedWindow() 函数

Python OpenCV namedWindow() 方法用于创建一个具有合适名称和大小的窗口,以在屏幕上显示图像和视频。默认情况下,图像以其原始大小显示,因此我们可能需要调整图像大小以使其适合我们的屏幕。

创建的窗口以其名称引用,也可以用作占位符。如果存在同名的窗口,则该函数不执行任何操作。

语法: cv2.namedWindow(window_name, flag) 参数: window_name:将显示图像/视频的窗口的名称 flag: 表示窗口大小是自动设置还是可调整。 一些标志值是: WINDOW_NORMAL –允许手动更改窗口大小 WINDOW_AUTOSIZE(Default) –自动 设置窗口大小 WINDOW_FULLSCREEN –将窗口大小更改为全屏 返回值:它不返回任何东西

用于以下所有示例的图像:

示例 1:使用namedWindow() 方法自动 设置窗口大小

    蟒蛇3
# Python program to explain cv2.namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in default mode image= cv2.imread(path) # Using namedWindow() # A window with Display name is created # with WINDOW_AUTOSIZE, window size is set automatically cv2.namedWindow("Display", cv.WINDOW_AUTOSIZE) # using cv2.imshow() to display the image cv2.imshow(Display, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows()
# Python program to explain cv2.namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in default mode image= cv2.imread(path) # Using namedWindow() # A window with Display name is created # with WINDOW_AUTOSIZE, window size is set automatically cv2.namedWindow("Display", cv.WINDOW_AUTOSIZE) # using cv2.imshow() to display the image cv2.imshow(Display, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows()
# Python program to explain cv2.namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in default mode image= cv2.imread(path) # Using namedWindow() # A window with Display name is created # with WINDOW_AUTOSIZE, window size is set automatically cv2.namedWindow("Display", cv.WINDOW_AUTOSIZE) # using cv2.imshow() to display the image cv2.imshow(Display, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows()
# Python program to explain cv2.namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in default mode image= cv2.imread(path) # Using namedWindow() # A window with Display name is created # with WINDOW_AUTOSIZE, window size is set automatically cv2.namedWindow("Display", cv.WINDOW_AUTOSIZE) # using cv2.imshow() to display the image cv2.imshow(Display, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows()
# Python program to explain cv2.namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in default mode image= cv2.imread(path) # Using namedWindow() # A window with Display name is created # with WINDOW_AUTOSIZE, window size is set automatically cv2.namedWindow("Display", cv.WINDOW_AUTOSIZE) # using cv2.imshow() to display the image cv2.imshow(Display, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows()
蟒蛇3 # Python program to explain cv2.namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in default mode image= cv2.imread(path) # Using namedWindow() # A window with Display name is created # with WINDOW_AUTOSIZE, window size is set automatically cv2.namedWindow("Display", cv.WINDOW_AUTOSIZE) # using cv2.imshow() to display the image cv2.imshow(Display, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows()
蟒蛇3 # Python program to explain cv2.namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in default mode image= cv2.imread(path) # Using namedWindow() # A window with Display name is created # with WINDOW_AUTOSIZE, window size is set automatically cv2.namedWindow("Display", cv.WINDOW_AUTOSIZE) # using cv2.imshow() to display the image cv2.imshow(Display, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows()
蟒蛇3 # Python program to explain cv2.namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in default mode image= cv2.imread(path) # Using namedWindow() # A window with Display name is created # with WINDOW_AUTOSIZE, window size is set automatically cv2.namedWindow("Display", cv.WINDOW_AUTOSIZE) # using cv2.imshow() to display the image cv2.imshow(Display, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows()

输出:

说明:

    在这段代码中,为了使用namedWindow函数,引入了OpenCV的python库。 然后通过使用 cv2.imread,来自特定位置(路径)的文件在默认模式下加载到 image 变量中。 现在创建一个带有“显示”名称的窗口,并且使用了命名窗口的图像自动大小。 通过使用 cv2.imshow,自定义窗口显示在屏幕上。等待 0 毫秒后,用户可以通过按键盘上的任意键来销毁所有窗口。

示例2:手动更改窗口大小

    蟒蛇3
# Python Program to explain namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in grayscale mode image= cv2.imread(path,0) # Using namedWindow() # A window with Display_Image name is created # with WINDOW_NORMAL allowing us to have random size cv2.namedWindow("Display_Image", cv.WINDOW_NORMAL) # Using cv2.imshow() to display the image cv2.imshow(Display_Image, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows()
# Python Program to explain namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in grayscale mode image= cv2.imread(path,0) # Using namedWindow() # A window with Display_Image name is created # with WINDOW_NORMAL allowing us to have random size cv2.namedWindow("Display_Image", cv.WINDOW_NORMAL) # Using cv2.imshow() to display the image cv2.imshow(Display_Image, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows()
# Python Program to explain namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in grayscale mode image= cv2.imread(path,0) # Using namedWindow() # A window with Display_Image name is created # with WINDOW_NORMAL allowing us to have random size cv2.namedWindow("Display_Image", cv.WINDOW_NORMAL) # Using cv2.imshow() to display the image cv2.imshow(Display_Image, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows()
# Python Program to explain namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in grayscale mode image= cv2.imread(path,0) # Using namedWindow() # A window with Display_Image name is created # with WINDOW_NORMAL allowing us to have random size cv2.namedWindow("Display_Image", cv.WINDOW_NORMAL) # Using cv2.imshow() to display the image cv2.imshow(Display_Image, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows()
# Python Program to explain namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in grayscale mode image= cv2.imread(path,0) # Using namedWindow() # A window with Display_Image name is created # with WINDOW_NORMAL allowing us to have random size cv2.namedWindow("Display_Image", cv.WINDOW_NORMAL) # Using cv2.imshow() to display the image cv2.imshow(Display_Image, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows()
蟒蛇3 # Python Program to explain namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in grayscale mode image= cv2.imread(path,0) # Using namedWindow() # A window with Display_Image name is created # with WINDOW_NORMAL allowing us to have random size cv2.namedWindow("Display_Image", cv.WINDOW_NORMAL) # Using cv2.imshow() to display the image cv2.imshow(Display_Image, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows()
蟒蛇3 # Python Program to explain namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in grayscale mode image= cv2.imread(path,0) # Using namedWindow() # A window with Display_Image name is created # with WINDOW_NORMAL allowing us to have random size cv2.namedWindow("Display_Image", cv.WINDOW_NORMAL) # Using cv2.imshow() to display the image cv2.imshow(Display_Image, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows()
蟒蛇3 # Python Program to explain namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in grayscale mode image= cv2.imread(path,0) # Using namedWindow() # A window with Display_Image name is created # with WINDOW_NORMAL allowing us to have random size cv2.namedWindow("Display_Image", cv.WINDOW_NORMAL) # Using cv2.imshow() to display the image cv2.imshow(Display_Image, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows()

输出:

注意:当用户随机改变尺寸时,窗口尺寸改变后图像的尺寸保持不变。

Python OpenCV namedWindow() 方法用于创建一个具有合适名称和大小的窗口,以在屏幕上显示图像和视频。默认情况下,图像以其原始大小显示,因此我们可能需要调整图像大小以使其适合我们的屏幕。 创建的窗口以其名称引用,也可以用作占位符。如果存在同名的窗口,则该函数不执行任何操作。 语法: cv2.namedWindow(window_name, flag) 参数: window_name:将显示图像/视频的窗口的名称 flag: 表示窗口大小是自动设置还是可调整。 一些标志值是: WINDOW_NORMAL –允许手动更改窗口大小 WINDOW_AUTOSIZE(Default) –自动 设置窗口大小 WINDOW_FULLSCREEN –将窗口大小更改为全屏 返回值:它不返回任何东西 用于以下所有示例的图像: 示例 1:使用namedWindow() 方法自动 设置窗口大小 蟒蛇3 # Python program to explain cv2.namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in default mode image= cv2.imread(path) # Using namedWindow() # A window with Display name is created # with WINDOW_AUTOSIZE, window size is set automatically cv2.namedWindow("Display", cv.WINDOW_AUTOSIZE) # using cv2.imshow() to display the image cv2.imshow(Display, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows() 输出: 说明: 在这段代码中,为了使用namedWindow函数,引入了OpenCV的python库。 然后通过使用 cv2.imread,来自特定位置(路径)的文件在默认模式下加载到 image 变量中。 现在创建一个带有“显示”名称的窗口,并且使用了命名窗口的图像自动大小。 通过使用 cv2.imshow,自定义窗口显示在屏幕上。等待 0 毫秒后,用户可以通过按键盘上的任意键来销毁所有窗口。 示例2:手动更改窗口大小 蟒蛇3 # Python Program to explain namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in grayscale mode image= cv2.imread(path,0) # Using namedWindow() # A window with Display_Image name is created # with WINDOW_NORMAL allowing us to have random size cv2.namedWindow("Display_Image", cv.WINDOW_NORMAL) # Using cv2.imshow() to display the image cv2.imshow(Display_Image, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows() 输出: 注意:当用户随机改变尺寸时,窗口尺寸改变后图像的尺寸保持不变。
Python OpenCV namedWindow() 方法用于创建一个具有合适名称和大小的窗口,以在屏幕上显示图像和视频。默认情况下,图像以其原始大小显示,因此我们可能需要调整图像大小以使其适合我们的屏幕。 创建的窗口以其名称引用,也可以用作占位符。如果存在同名的窗口,则该函数不执行任何操作。 语法: cv2.namedWindow(window_name, flag) 参数: window_name:将显示图像/视频的窗口的名称 flag: 表示窗口大小是自动设置还是可调整。 一些标志值是: WINDOW_NORMAL –允许手动更改窗口大小 WINDOW_AUTOSIZE(Default) –自动 设置窗口大小 WINDOW_FULLSCREEN –将窗口大小更改为全屏 返回值:它不返回任何东西 用于以下所有示例的图像: 示例 1:使用namedWindow() 方法自动 设置窗口大小 蟒蛇3 # Python program to explain cv2.namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in default mode image= cv2.imread(path) # Using namedWindow() # A window with Display name is created # with WINDOW_AUTOSIZE, window size is set automatically cv2.namedWindow("Display", cv.WINDOW_AUTOSIZE) # using cv2.imshow() to display the image cv2.imshow(Display, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows() 输出: 说明: 在这段代码中,为了使用namedWindow函数,引入了OpenCV的python库。 然后通过使用 cv2.imread,来自特定位置(路径)的文件在默认模式下加载到 image 变量中。 现在创建一个带有“显示”名称的窗口,并且使用了命名窗口的图像自动大小。 通过使用 cv2.imshow,自定义窗口显示在屏幕上。等待 0 毫秒后,用户可以通过按键盘上的任意键来销毁所有窗口。 示例2:手动更改窗口大小 蟒蛇3 # Python Program to explain namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in grayscale mode image= cv2.imread(path,0) # Using namedWindow() # A window with Display_Image name is created # with WINDOW_NORMAL allowing us to have random size cv2.namedWindow("Display_Image", cv.WINDOW_NORMAL) # Using cv2.imshow() to display the image cv2.imshow(Display_Image, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows() 输出: 注意:当用户随机改变尺寸时,窗口尺寸改变后图像的尺寸保持不变。
Python OpenCV namedWindow() 方法用于创建一个具有合适名称和大小的窗口,以在屏幕上显示图像和视频。默认情况下,图像以其原始大小显示,因此我们可能需要调整图像大小以使其适合我们的屏幕。 创建的窗口以其名称引用,也可以用作占位符。如果存在同名的窗口,则该函数不执行任何操作。 语法: cv2.namedWindow(window_name, flag) 参数: window_name:将显示图像/视频的窗口的名称 flag: 表示窗口大小是自动设置还是可调整。 一些标志值是: WINDOW_NORMAL –允许手动更改窗口大小 WINDOW_AUTOSIZE(Default) –自动 设置窗口大小 WINDOW_FULLSCREEN –将窗口大小更改为全屏 返回值:它不返回任何东西 用于以下所有示例的图像: 示例 1:使用namedWindow() 方法自动 设置窗口大小 蟒蛇3 # Python program to explain cv2.namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in default mode image= cv2.imread(path) # Using namedWindow() # A window with Display name is created # with WINDOW_AUTOSIZE, window size is set automatically cv2.namedWindow("Display", cv.WINDOW_AUTOSIZE) # using cv2.imshow() to display the image cv2.imshow(Display, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows() 输出: 说明: 在这段代码中,为了使用namedWindow函数,引入了OpenCV的python库。 然后通过使用 cv2.imread,来自特定位置(路径)的文件在默认模式下加载到 image 变量中。 现在创建一个带有“显示”名称的窗口,并且使用了命名窗口的图像自动大小。 通过使用 cv2.imshow,自定义窗口显示在屏幕上。等待 0 毫秒后,用户可以通过按键盘上的任意键来销毁所有窗口。 示例2:手动更改窗口大小 蟒蛇3 # Python Program to explain namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in grayscale mode image= cv2.imread(path,0) # Using namedWindow() # A window with Display_Image name is created # with WINDOW_NORMAL allowing us to have random size cv2.namedWindow("Display_Image", cv.WINDOW_NORMAL) # Using cv2.imshow() to display the image cv2.imshow(Display_Image, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows() 输出: 注意:当用户随机改变尺寸时,窗口尺寸改变后图像的尺寸保持不变。
Python OpenCV namedWindow() 方法用于创建一个具有合适名称和大小的窗口,以在屏幕上显示图像和视频。默认情况下,图像以其原始大小显示,因此我们可能需要调整图像大小以使其适合我们的屏幕。 创建的窗口以其名称引用,也可以用作占位符。如果存在同名的窗口,则该函数不执行任何操作。 语法: cv2.namedWindow(window_name, flag) 参数: window_name:将显示图像/视频的窗口的名称 flag: 表示窗口大小是自动设置还是可调整。 一些标志值是: WINDOW_NORMAL –允许手动更改窗口大小 WINDOW_AUTOSIZE(Default) –自动 设置窗口大小 WINDOW_FULLSCREEN –将窗口大小更改为全屏 返回值:它不返回任何东西 用于以下所有示例的图像: 示例 1:使用namedWindow() 方法自动 设置窗口大小 蟒蛇3 # Python program to explain cv2.namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in default mode image= cv2.imread(path) # Using namedWindow() # A window with Display name is created # with WINDOW_AUTOSIZE, window size is set automatically cv2.namedWindow("Display", cv.WINDOW_AUTOSIZE) # using cv2.imshow() to display the image cv2.imshow(Display, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows() 输出: 说明: 在这段代码中,为了使用namedWindow函数,引入了OpenCV的python库。 然后通过使用 cv2.imread,来自特定位置(路径)的文件在默认模式下加载到 image 变量中。 现在创建一个带有“显示”名称的窗口,并且使用了命名窗口的图像自动大小。 通过使用 cv2.imshow,自定义窗口显示在屏幕上。等待 0 毫秒后,用户可以通过按键盘上的任意键来销毁所有窗口。 示例2:手动更改窗口大小 蟒蛇3 # Python Program to explain namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in grayscale mode image= cv2.imread(path,0) # Using namedWindow() # A window with Display_Image name is created # with WINDOW_NORMAL allowing us to have random size cv2.namedWindow("Display_Image", cv.WINDOW_NORMAL) # Using cv2.imshow() to display the image cv2.imshow(Display_Image, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows() 输出: 注意:当用户随机改变尺寸时,窗口尺寸改变后图像的尺寸保持不变。
Python OpenCV namedWindow() 方法用于创建一个具有合适名称和大小的窗口,以在屏幕上显示图像和视频。默认情况下,图像以其原始大小显示,因此我们可能需要调整图像大小以使其适合我们的屏幕。 创建的窗口以其名称引用,也可以用作占位符。如果存在同名的窗口,则该函数不执行任何操作。 语法: cv2.namedWindow(window_name, flag) 参数: window_name:将显示图像/视频的窗口的名称 flag: 表示窗口大小是自动设置还是可调整。 一些标志值是: WINDOW_NORMAL –允许手动更改窗口大小 WINDOW_AUTOSIZE(Default) –自动 设置窗口大小 WINDOW_FULLSCREEN –将窗口大小更改为全屏 返回值:它不返回任何东西 用于以下所有示例的图像: 示例 1:使用namedWindow() 方法自动 设置窗口大小 蟒蛇3 # Python program to explain cv2.namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in default mode image= cv2.imread(path) # Using namedWindow() # A window with Display name is created # with WINDOW_AUTOSIZE, window size is set automatically cv2.namedWindow("Display", cv.WINDOW_AUTOSIZE) # using cv2.imshow() to display the image cv2.imshow(Display, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows() 输出: 说明: 在这段代码中,为了使用namedWindow函数,引入了OpenCV的python库。 然后通过使用 cv2.imread,来自特定位置(路径)的文件在默认模式下加载到 image 变量中。 现在创建一个带有“显示”名称的窗口,并且使用了命名窗口的图像自动大小。 通过使用 cv2.imshow,自定义窗口显示在屏幕上。等待 0 毫秒后,用户可以通过按键盘上的任意键来销毁所有窗口。 示例2:手动更改窗口大小 蟒蛇3 # Python Program to explain namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in grayscale mode image= cv2.imread(path,0) # Using namedWindow() # A window with Display_Image name is created # with WINDOW_NORMAL allowing us to have random size cv2.namedWindow("Display_Image", cv.WINDOW_NORMAL) # Using cv2.imshow() to display the image cv2.imshow(Display_Image, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows() 输出: 注意:当用户随机改变尺寸时,窗口尺寸改变后图像的尺寸保持不变。
Python OpenCV namedWindow() 方法用于创建一个具有合适名称和大小的窗口,以在屏幕上显示图像和视频。默认情况下,图像以其原始大小显示,因此我们可能需要调整图像大小以使其适合我们的屏幕。 创建的窗口以其名称引用,也可以用作占位符。如果存在同名的窗口,则该函数不执行任何操作。 语法: cv2.namedWindow(window_name, flag) 参数: window_name:将显示图像/视频的窗口的名称 flag: 表示窗口大小是自动设置还是可调整。 一些标志值是: WINDOW_NORMAL –允许手动更改窗口大小 WINDOW_AUTOSIZE(Default) –自动 设置窗口大小 WINDOW_FULLSCREEN –将窗口大小更改为全屏 返回值:它不返回任何东西 用于以下所有示例的图像: 示例 1:使用namedWindow() 方法自动 设置窗口大小 蟒蛇3 # Python program to explain cv2.namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in default mode image= cv2.imread(path) # Using namedWindow() # A window with Display name is created # with WINDOW_AUTOSIZE, window size is set automatically cv2.namedWindow("Display", cv.WINDOW_AUTOSIZE) # using cv2.imshow() to display the image cv2.imshow(Display, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows() 输出: 说明: 在这段代码中,为了使用namedWindow函数,引入了OpenCV的python库。 然后通过使用 cv2.imread,来自特定位置(路径)的文件在默认模式下加载到 image 变量中。 现在创建一个带有“显示”名称的窗口,并且使用了命名窗口的图像自动大小。 通过使用 cv2.imshow,自定义窗口显示在屏幕上。等待 0 毫秒后,用户可以通过按键盘上的任意键来销毁所有窗口。 示例2:手动更改窗口大小 蟒蛇3 # Python Program to explain namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in grayscale mode image= cv2.imread(path,0) # Using namedWindow() # A window with Display_Image name is created # with WINDOW_NORMAL allowing us to have random size cv2.namedWindow("Display_Image", cv.WINDOW_NORMAL) # Using cv2.imshow() to display the image cv2.imshow(Display_Image, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows() 输出: 注意:当用户随机改变尺寸时,窗口尺寸改变后图像的尺寸保持不变。
Python OpenCV namedWindow() 方法用于创建一个具有合适名称和大小的窗口,以在屏幕上显示图像和视频。默认情况下,图像以其原始大小显示,因此我们可能需要调整图像大小以使其适合我们的屏幕。 创建的窗口以其名称引用,也可以用作占位符。如果存在同名的窗口,则该函数不执行任何操作。 语法: cv2.namedWindow(window_name, flag) 参数: window_name:将显示图像/视频的窗口的名称 flag: 表示窗口大小是自动设置还是可调整。 一些标志值是: WINDOW_NORMAL –允许手动更改窗口大小 WINDOW_AUTOSIZE(Default) –自动 设置窗口大小 WINDOW_FULLSCREEN –将窗口大小更改为全屏 返回值:它不返回任何东西 用于以下所有示例的图像: 示例 1:使用namedWindow() 方法自动 设置窗口大小 蟒蛇3 # Python program to explain cv2.namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in default mode image= cv2.imread(path) # Using namedWindow() # A window with Display name is created # with WINDOW_AUTOSIZE, window size is set automatically cv2.namedWindow("Display", cv.WINDOW_AUTOSIZE) # using cv2.imshow() to display the image cv2.imshow(Display, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows() 输出: 说明: 在这段代码中,为了使用namedWindow函数,引入了OpenCV的python库。 然后通过使用 cv2.imread,来自特定位置(路径)的文件在默认模式下加载到 image 变量中。 现在创建一个带有“显示”名称的窗口,并且使用了命名窗口的图像自动大小。 通过使用 cv2.imshow,自定义窗口显示在屏幕上。等待 0 毫秒后,用户可以通过按键盘上的任意键来销毁所有窗口。 示例2:手动更改窗口大小 蟒蛇3 # Python Program to explain namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in grayscale mode image= cv2.imread(path,0) # Using namedWindow() # A window with Display_Image name is created # with WINDOW_NORMAL allowing us to have random size cv2.namedWindow("Display_Image", cv.WINDOW_NORMAL) # Using cv2.imshow() to display the image cv2.imshow(Display_Image, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows() 输出: 注意:当用户随机改变尺寸时,窗口尺寸改变后图像的尺寸保持不变。
Python OpenCV namedWindow() 方法用于创建一个具有合适名称和大小的窗口,以在屏幕上显示图像和视频。默认情况下,图像以其原始大小显示,因此我们可能需要调整图像大小以使其适合我们的屏幕。 创建的窗口以其名称引用,也可以用作占位符。如果存在同名的窗口,则该函数不执行任何操作。 语法: cv2.namedWindow(window_name, flag) 参数: window_name:将显示图像/视频的窗口的名称 flag: 表示窗口大小是自动设置还是可调整。 一些标志值是: WINDOW_NORMAL –允许手动更改窗口大小 WINDOW_AUTOSIZE(Default) –自动 设置窗口大小 WINDOW_FULLSCREEN –将窗口大小更改为全屏 返回值:它不返回任何东西 用于以下所有示例的图像: 示例 1:使用namedWindow() 方法自动 设置窗口大小 蟒蛇3 # Python program to explain cv2.namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in default mode image= cv2.imread(path) # Using namedWindow() # A window with Display name is created # with WINDOW_AUTOSIZE, window size is set automatically cv2.namedWindow("Display", cv.WINDOW_AUTOSIZE) # using cv2.imshow() to display the image cv2.imshow(Display, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows() 输出: 说明: 在这段代码中,为了使用namedWindow函数,引入了OpenCV的python库。 然后通过使用 cv2.imread,来自特定位置(路径)的文件在默认模式下加载到 image 变量中。 现在创建一个带有“显示”名称的窗口,并且使用了命名窗口的图像自动大小。 通过使用 cv2.imshow,自定义窗口显示在屏幕上。等待 0 毫秒后,用户可以通过按键盘上的任意键来销毁所有窗口。 示例2:手动更改窗口大小 蟒蛇3 # Python Program to explain namedWindow() method # Importing OpenCV import cv2 # Path to image in local directory path= C:/Users/art/OneDrive/Desktop/geeks.png # Using cv2.imread() to read an image in grayscale mode image= cv2.imread(path,0) # Using namedWindow() # A window with Display_Image name is created # with WINDOW_NORMAL allowing us to have random size cv2.namedWindow("Display_Image", cv.WINDOW_NORMAL) # Using cv2.imshow() to display the image cv2.imshow(Display_Image, image) # Waiting 0ms for user to press any key cv2.waitKey(0) # Using cv2.destroyAllWindows() to destroy # all created windows open on screen cv2.destroyAllWindows() 输出: 注意:当用户随机改变尺寸时,窗口尺寸改变后图像的尺寸保持不变。
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