python PIL和CV对 图片的读取,显示,裁剪,保存实现方法

img = Image.open(“a.jpg”)

im.show() # im是Image对象，im是numpy类型，通过Image.fromarray(nparr, mode='RGB')函数转换为Image对象

(width, height) = img.size

mode = img.mode

img_c = img.crop(x1,y1,x2,y2)

img = img.resize((size,size), Image.ANTIALIAS)

img.save(path)
ImageDraw

  imDrwa = ImageDraw.Draw(img)
  # boxes = [[10, 20, 129, 255],[126, 0, 221, 164]]
  imDrwa.rectangle((x1, y1, x2, y2), outline="red")
  img.show()

im = cv2.imread()

cv2.imshow('image',img)
cv2.waitKey(0)
cv2.destroyAllWindows()

img=cv2.resize(image,(size,size),interpolation = cv2.INTER_AREA)

cv2.imwrite('1.jpg',img, [int( cv2.IMWRITE_JPEG_QUALITY), 95]) # 默认95