强制 Google Vision API 检测日期/数字

Question

我正在尝试使用 Google Vision API 检测手写日期。你知道是否可以强制它检测日期（DD/MM/YYYY），或者至少只是为了增加可靠性而检测数字？

我使用的函数，将 Image 作为 np.array 作为输入：

def detect_handwritten_text(img):
"""Recognizes characters using the Google Cloud Vision API.
Args:
    img(np.array) = The Image on which to apply the OCR.

Returns:
    The recognized content of img as string.
"""

from google.cloud import vision_v1p3beta1 as vision
client = vision.ImageAnnotatorClient()

# Transform np.array image format into vision api readable byte format
sucess, encoded_image = cv.imencode('.png', img)
content = encoded_image.tobytes()

# Configure client to detect handwriting and load picture
image = vision.types.Image(content=content)
image_context = vision.types.ImageContext(language_hints=['en-t-i0-handwrit'])

response = client.document_text_detection(image=image, image_context=image_context)
return response.full_text_annotation.text

Answer 1

在 ImageAnnotatorClient.DetectDocumentText(your image) 之后，您可以遍历每个块内的块和单词，并尝试在每个单词上匹配正则表达式以查找日期和数字。