我如何使用 Node Js 进行文本检测和标签检测？

Question

const results = await visionClient.labelDetection(imageUri).safeSearchDetection(imageUri);

我正在尝试通过云视觉获得图像响应。

Answer 1

下面是 HTTPS 云函数的代码示例，它将对存储在 Firebase 存储中的图像执行 OCR（即文本检测）。例如，在将图像上传到 Firebase 存储（在 gs://myproject.com/imgtoocr/ 存储桶中）后，您可以通过在 HTTP 请求正文中传递图像名称来从您的应用调用它。

....
const vision = require('@google-cloud/vision');
const client = new vision.ImageAnnotatorClient();


exports.imageOCR = functions.https.onRequest((req, res) => {
  cors(req, res, () => {
    const imageFilename = req.body.imageFilename;

    let result;

    return client
      .documentTextDetection(
        'gs://myproject.com/imgtoocr/' + imageFilename
      )
      .then(results => {
        const blocks = results[0].fullTextAnnotation.pages[0].blocks;

        blocks.forEach(blockDetail => {
          blockDetail.paragraphs.forEach(paragraph => {
            //Here you build the result you want to send back
          });
        });

        return {
          result: result
        };
      })
      .then(ocrResult => {
        return res.status(200).json(ocrResult);
      })
      .catch(err => {
        console.error('ERROR:', err);
        res.status(400).send(err);
      });
  });
});

您将在 node.js 的以下文档中找到更多信息和示例（特别是标签检测）：

https://cloud.google.com/vision/docs/ocr-tutorial

https://cloud.google.com/vision/docs/detecting-labels

https://cloud.google.com/nodejs/docs/reference/vision/0.19.x/

Answer 2

0.21.0 版本用这种方法解决了

import * as vision from '@google-cloud/vision';
const visionClient = new vision.ImageAnnotatorClient();

const request = {
                "image": {
                    "source": {
                        "imageUri": imageUri
                    }
                },
                "features": [
                    {
                        "type": "FACE_DETECTION"
                    },
                    {
                        "type": "LABEL_DETECTION"
                    },
                    {
                        "type": "SAFE_SEARCH_DETECTION"
                    },
                    {
                        "type": "WEB_DETECTION"
                    },
                    {
                        "type": "CROP_HINTS"
                    },
                    {
                        "type": "IMAGE_PROPERTIES"
                    },
                    {
                        "type": "DOCUMENT_TEXT_DETECTION"
                    },
                    {
                        "type": "TEXT_DETECTION"
                    },
                    {
                        "type": "LOGO_DETECTION"
                    },
                    {
                        "type": "LANDMARK_DETECTION"
                    },
                    {
                        "type": "TYPE_UNSPECIFIED"
                    },
                    // Other detection types here...
                ]
        };

        return await visionClient.annotateImage(request).then((res) => {
            console.log(JSON.stringify(res));
        });

我如何使用 Node Js 进行文本检测和标签检测？

How do i get textDetection and LabelDetection with NodeJs?

node.js

firebase

google-cloud-functions

google-cloud-vision