1.pillow将图片转换成字节流
from PIL import Image
import io
import base64
img = Image.open("1.jpg")
imgByteArr = io.BytesIO()
img.save(imgByteArr, format='JPEG')
imgByteArr = imgByteArr.getvalue()
2.pillow将二进制转换成图片
img = Image.fromarray(data)
img.save("1.jpg", quality=100)
3.base64将imagebase64转换成图片
avatar_str = data.replace('data:image/png;base64,', '')
avatar_bytes = base64.b64decode(avatar_str)
with open('1.png', 'wb+') as fp:
fp.write(avatar_bytes)
4.将图片转换成imagebase64
png = open('1.png','rb')
res = png.read()
s = base64.b64encode(res)
data = 'data:image/png;base64,' + s
5.将二进制字节转换成opencv读取的格式
image_data = BytesIO(data)
img = Image.open(image_data)
query = np.asarray(img)
cv2.imwrite('a.jpg', query)