Python調整圖像大小併發送到谷歌視覺功能

Question

由於谷歌視覺有一些輸入圖像大小restrictions，我想先調整輸入圖像的大小，然後使用detect_labels()函數。

這裏是他們的sample code

def detect_labels(path): 
"""Detects labels in the file.""" 
vision_client = vision.Client() 

with io.open(path, 'rb') as image_file: 
    content = image_file.read() 

image = vision_client.image(content=content) 

labels = image.detect_labels() 
print('Labels:') 

for label in labels: 
    print(label.description) 

他們使用io打開圖像文件。我想知道如何調整內存的內存大小然後調用detect_labels()？

Answer 1

您可以通過PIL /枕頭調整圖像大小，然後將它傳遞給客戶端：

更換

with io.open(path, 'rb') as image_file: 
    content = image_file.read() 

與

# Warning: untested code, may require some fiddling 
import Image, StringIO 

img = Image.open(path) 
img.thumbnail((512, 512)) 
buffer = StringIO.StringIO() 
img.save(buffer, "PNG") 

content = buffer.getvalue()