在python中将win32ui DataBitmap转换为数组

Question

我想拍一张屏幕截图，而不是将其转换为数组，而不将文件保存为路径中的图像，然后从路径再次加载以转换它：

我想要的是直接将数据转换为数组：

w = 1920
h = 1080
bmpfilenamename = r"path"
hwnd = win32gui.FindWindow(None, "my_window")
wDC = win32gui.GetWindowDC(hwnd)
dcObj=win32ui.CreateDCFromHandle(wDC)
cDC=dcObj.CreateCompatibleDC()
dataBitMap = win32ui.CreateBitmap()
dataBitMap.CreateCompatibleBitmap(dcObj, w, h)
cDC.SelectObject(dataBitMap)
cDC.BitBlt((0, 0),(w, h) , dcObj, (0, 0), win32con.SRCCOPY)
dataBitMap.SaveBitmapFile(cDC, bmpfilenamename) #i want to ignor this phase and directly convert the data to array
My_array = np.array(#myimg , dtype='float')
print(array)
print(array.shape)

我的最终目标是给神经网络预定义模型提供快速的屏幕截图

Answer 1

您可以使用PIL将dataBitMap转换为PIL图像对象，如下所示
使用array = np.asarray(im)将im转换为NumPy数组。

像素格式应该是BGRA。

这是一个代码示例：

import win32gui
import win32ui
import win32con
import numpy as np
from PIL import Image
import cv2  # Used for showing the NumPy array as image
w = 1920
h = 1080
hwnd = win32gui.FindWindow(None, "my_window")
wDC = win32gui.GetWindowDC(hwnd)
dcObj = win32ui.CreateDCFromHandle(wDC)
cDC = dcObj.CreateCompatibleDC()
dataBitMap = win32ui.CreateBitmap()
dataBitMap.CreateCompatibleBitmap(dcObj, w, h)
cDC.SelectObject(dataBitMap)
cDC.BitBlt((0, 0), (w, h), dcObj, (0, 0), win32con.SRCCOPY)
# https://stackoverflow.com/questions/6951557/pil-and-bitmap-from-winapi
bmpinfo = dataBitMap.GetInfo()
bmpstr = dataBitMap.GetBitmapBits(True)
im = Image.frombuffer('RGBA', (bmpinfo['bmWidth'], bmpinfo['bmHeight']), bmpstr, 'raw', 'RGBA', 0, 1)
array = np.asarray(im) # Convet to NumPy array
# Show image for testing
cv2.imshow('array', array)
cv2.waitKey()
cv2.destroyAllWindows()