PDF/TIFF 文档文本检测 gcsDestinationBucketName

Question

我正在使用 google 云视觉 API.

将 Pdf 转换为文本文件

我通过那里获得了初始代码帮助，图像到文本的转换工作正常，我通过注册和激活获得了 JSON 密钥，

这是我得到的用于 pdf 到文本转换的代码

private static object DetectDocument(string gcsSourceUri,
string gcsDestinationBucketName, string gcsDestinationPrefixName)
{
var client = ImageAnnotatorClient.Create();

var asyncRequest = new AsyncAnnotateFileRequest
{
    InputConfig = new InputConfig
    {
        GcsSource = new GcsSource
        {
            Uri = gcsSourceUri
        },
        // Supported mime_types are: 'application/pdf' and 'image/tiff'
        MimeType = "application/pdf"
    },
    OutputConfig = new OutputConfig
    {
        // How many pages should be grouped into each json output file.
        BatchSize = 2,
        GcsDestination = new GcsDestination
        {
            Uri = $"gs://{gcsDestinationBucketName}/{gcsDestinationPrefixName}"
        }
    }
};

asyncRequest.Features.Add(new Feature
{
    Type = Feature.Types.Type.DocumentTextDetection
});

List<AsyncAnnotateFileRequest> requests =
    new List<AsyncAnnotateFileRequest>();
requests.Add(asyncRequest);

var operation = client.AsyncBatchAnnotateFiles(requests);

Console.WriteLine("Waiting for the operation to finish");

operation.PollUntilCompleted();

// Once the rquest has completed and the output has been
// written to GCS, we can list all the output files.
var storageClient = StorageClient.Create();

// List objects with the given prefix.
var blobList = storageClient.ListObjects(gcsDestinationBucketName,
    gcsDestinationPrefixName);
Console.WriteLine("Output files:");
foreach (var blob in blobList)
{
    Console.WriteLine(blob.Name);
}

// Process the first output file from GCS.
// Select the first JSON file from the objects in the list.
var output = blobList.Where(x => x.Name.Contains(".json")).First();

var jsonString = "";
using (var stream = new MemoryStream())
{
    storageClient.DownloadObject(output, stream);
    jsonString = System.Text.Encoding.UTF8.GetString(stream.ToArray());
}

var response = JsonParser.Default
            .Parse<AnnotateFileResponse>(jsonString);

// The actual response for the first page of the input file.
var firstPageResponses = response.Responses[0];
var annotation = firstPageResponses.FullTextAnnotation;

// Here we print the full text from the first page.
// The response contains more information:
// annotation/pages/blocks/paragraphs/words/symbols
// including confidence scores and bounding boxes
Console.WriteLine($"Full text: \n {annotation.Text}");

return 0;
}

这个函数需要3个参数字符串 gcsSourceUri, 字符串 gcsDestinationBucketName，字符串 gcsDestinationPrefixName

我不明白我应该为这 3 个参数设置哪个值。我以前从未在第三方工作过 API 所以这让我有点困惑

Answer 1

假设您拥有一个名为 'giri_bucket' 的 GCS 存储桶，并将 pdf 放在存储桶的根目录下 'test.pdf'。如果您想将操作的结果写入同一个存储桶，您可以将参数设置为

gcsSourceUri: 'gs://giri_bucket/test.pdf'
gcsDestinationBucketName：'giri_bucket'
gcsDestinationPrefixName：'async_test'

操作完成后，您的 GCS 存储桶中将有 1 个或多个输出文件 giri_bucket/async_test。

如果需要，您甚至可以将输出写入不同的存储桶。您只需要确保您的 gcsDestinationBucketName + gcsDestinationPrefixName 是唯一的。

您可以在文档中阅读有关请求格式的更多信息：AsyncAnnotateFileRequest

PDF/TIFF 文档文本检测 gcsDestinationBucketName

PDF/TIFF Document Text Detection gcsDestinationBucketName

c#

asp.net

google-cloud-platform

google-cloud-vision