偵測文件中的文字：邊界

傳回文件中偵測到文字的方塊周圍界線。

深入探索

如需包含這個程式碼範例的詳細說明文件，請參閱下列文章：

• 密集文件文字偵測教學課程

程式碼範例

Python

在試用這個範例之前，請先按照「使用用戶端程式庫的 Vision 快速入門導覽課程」中的 Python 設定操作說明進行操作。詳情請參閱 Vision Python API 參考文件。

如要向 Vision 進行驗證，請設定應用程式預設憑證。詳情請參閱「為本機開發環境設定驗證機制」。

def get_document_bounds(image_file, feature):
    """Finds the document bounds given an image and feature type.

    Args:
        image_file: path to the image file.
        feature: feature type to detect.

    Returns:
        List of coordinates for the corresponding feature type.
    """
    client = vision.ImageAnnotatorClient()

    bounds = []

    with open(image_file, "rb") as image_file:
        content = image_file.read()

    image = vision.Image(content=content)

    response = client.document_text_detection(image=image)
    document = response.full_text_annotation

    # Collect specified feature bounds by enumerating all document features
    for page in document.pages:
        for block in page.blocks:
            for paragraph in block.paragraphs:
                for word in paragraph.words:
                    for symbol in word.symbols:
                        if feature == FeatureType.SYMBOL:
                            bounds.append(symbol.bounding_box)

                    if feature == FeatureType.WORD:
                        bounds.append(word.bounding_box)

                if feature == FeatureType.PARA:
                    bounds.append(paragraph.bounding_box)

            if feature == FeatureType.BLOCK:
                bounds.append(block.bounding_box)

    # The list `bounds` contains the coordinates of the bounding boxes.
    return bounds

後續步驟

如要搜尋及篩選其他 Google Cloud 產品的程式碼範例，請參閱Google Cloud 瀏覽器範例。