DataFlex

Google Vision Web Detection

Demonstrates how to use the Cloud Cloud Vision API for the Web Detection method.

The Google Cloud Vision "web detection" API call performs web detection analysis on an image. When you send an image to the Vision API with the "web detection" feature enabled, the API returns information about web entities (objects, logos, landmarks, etc.) that are visually similar to objects in the image and are found on the web.

It includes:

Entity Recognition: The API identifies entities (objects, landmarks, logos, etc.) present in the image and provides information about them. This can include labels, descriptions, and additional metadata.
Web Pages: For recognized entities, the API retrieves information about web pages that contain visually similar images or information related to the entities found in the image.
Matching Images: The API may return URLs of images found on the web that are visually similar to the objects in the image being analyzed.
Best Guess Label: The API may also provide a "best guess" label or description for the image based on its analysis of the web entities.
Related Web Entities: Additionally, the API may return related web entities or concepts that are semantically related to the recognized objects.

Overall, the web detection feature of the Google Cloud Vision API allows you to perform reverse image search-like functionality, identifying objects in an image and providing information about similar objects found on the web. This can be useful for tasks such as image classification, content moderation, and visual search applications.

Chilkat DataFlex Downloads

Download Chilkat for DataFlex

DataFlex

Use ChilkatAx-win32.pkg

Procedure Test
    Boolean iSuccess
    Handle hoHttp
    Variant vJson
    Handle hoJson
    Variant vResp
    Handle hoResp
    Variant vJResp
    Handle hoJResp
    Integer iRespStatusCode
    String sTemp1

    Move False To iSuccess

    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    Get Create (RefClass(cComChilkatHttp)) To hoHttp
    If (Not(IsComObjectCreated(hoHttp))) Begin
        Send CreateComObject of hoHttp
    End

    // The following JSON is sent in the request body.

    // {
    //   "requests": [
    //     {
    //       "image": {
    //         "source": {
    //           "imageUri": "gs://visionapi-demo/ali.jpg"
    //         }
    //       },
    //       "features": [
    //         {
    //           "maxResults": 10,
    //           "type": "WEB_DETECTION"
    //         }
    //       ]
    //     }
    //   ]
    // }

    // The following code creates the JSON request body.
    Get Create (RefClass(cComChilkatJsonObject)) To hoJson
    If (Not(IsComObjectCreated(hoJson))) Begin
        Send CreateComObject of hoJson
    End
    Get ComUpdateString Of hoJson "requests[0].image.source.imageUri" "gs://visionapi-demo/ali.jpg" To iSuccess
    Get ComUpdateInt Of hoJson "requests[0].features[0].maxResults" 10 To iSuccess
    Get ComUpdateString Of hoJson "requests[0].features[0].type" "WEB_DETECTION" To iSuccess

    Set ComEmitCompact Of hoJson To False
    Get ComEmit Of hoJson To sTemp1
    Showln sTemp1

    Get Create (RefClass(cComChilkatHttpResponse)) To hoResp
    If (Not(IsComObjectCreated(hoResp))) Begin
        Send CreateComObject of hoResp
    End
    Get pvComObject of hoJson to vJson
    Get pvComObject of hoResp to vResp
    Get ComHttpJson Of hoHttp "POST" "https://vision.googleapis.com/v1/images:annotate?key=your-api-key-here" vJson "application/json" vResp To iSuccess
    If (iSuccess = False) Begin
        Get ComLastErrorText Of hoHttp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get Create (RefClass(cComChilkatJsonObject)) To hoJResp
    If (Not(IsComObjectCreated(hoJResp))) Begin
        Send CreateComObject of hoJResp
    End
    Get pvComObject of hoJResp to vJResp
    Get ComGetBodyJson Of hoResp vJResp To iSuccess
    Set ComEmitCompact Of hoJResp To False

    Showln "Response Body:"
    Get ComEmit Of hoJResp To sTemp1
    Showln sTemp1

    Get ComStatusCode Of hoResp To iRespStatusCode
    Showln "Response Status Code = " iRespStatusCode
    If (iRespStatusCode >= 400) Begin
        Showln "Response Header:"
        Get ComHeader Of hoResp To sTemp1
        Showln sTemp1
        Showln "Failed."
        Procedure_Return
    End



End_Procedure