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(VBScript) Google Cloud Vision Text Detection

Demonstrates calling the Google Cloud Vision for text detection (performs Optical Character Recognition). "Detects and extracts text within an image with support for a broad range of languages. It also features automatic language identification." See https://cloud.google.com/vision/docs/detecting-text

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

Dim fso, outFile
Set fso = CreateObject("Scripting.FileSystemObject")
Set outFile = fso.CreateTextFile("output.txt", True)

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

' Build the following request:

' {
'   "requests": [
'     {
'       "image": {
'         "content": "/9j/7QBEUGhvdG9zaG9...base64-encoded-image-content...fXNWzvDEeYxxxzj/Coa6Bax//Z"
'       },
'       "features": [
'         {
'           "type": "TEXT_DETECTION"
'         }
'       ]
'     }
'   ]
' }

' Use the this online tool to generate the code from sample JSON: 
' Generate Code to Create JSON

' Load an image file.
set imageData = CreateObject("Chilkat_9_5_0.BinData")
' This image file contains some text...
success = imageData.LoadFile("qa_data/jpg/text.jpg")
If (success <> 1) Then
    outFile.WriteLine("Failed to load image file.")
    WScript.Quit
End If

' Create the above JSON.
set json = CreateObject("Chilkat_9_5_0.JsonObject")
success = json.UpdateBd("requests[0].image.content","base64",imageData)
success = json.UpdateString("requests[0].features[0].type","TEXT_DETECTION")

' Send the following POST with the HTTP request body containing the above JSON.
' POST https://vision.googleapis.com/v1/images:annotate?key=YOUR_API_KEY

set http = CreateObject("Chilkat_9_5_0.Http")
set sb = CreateObject("Chilkat_9_5_0.StringBuilder")
url = "https://vision.googleapis.com/v1/images:annotate?key=YOUR_API_KEY"
' resp is a Chilkat_9_5_0.HttpResponse
Set resp = http.PostJson3(url,"application/json",json)
If (http.LastMethodSuccess <> 1) Then
    outFile.WriteLine(http.LastErrorText)
    WScript.Quit
End If

outFile.WriteLine("status = " & resp.StatusCode)

' A 200 response status indicate success.
If (resp.StatusCode <> 200) Then
    outFile.WriteLine(resp.BodyStr)
    outFile.WriteLine("Failed.")

    WScript.Quit
End If

set sbResponseBody = CreateObject("Chilkat_9_5_0.StringBuilder")
success = resp.GetBodySb(sbResponseBody)
success = sbResponseBody.WriteFile("qa_output/textDetectResponse.json","utf-8",0)
success = json.LoadSb(sbResponseBody)

' The response is a JSON document like this:

' Use the this online tool to generate parsing code from sample JSON: 
' Generate Parsing Code from JSON

' {
'   "responses": [
'     {
'       "textAnnotations": [
'         {
'           "locale": "en",
'           "description": "Chilkat is a cross-language, cross-platform\nAPl providing 90+ classes for many Internet\nprotocols, formats, and algorithms.\n",
'           "boundingPoly": {
'             "vertices": [
'               {
'                 "x": 17,
'                 "y": 14
'               },
' 	...
'             ]
'           }
'         ],
'         "text": "Chilkat is a cross-language, cross-platform\nAPl providing 90+ classes for many Internet\nprotocols, formats, and algorithms.\n"
'       }
'     }
'   ]
' }

' The parsing code generated from the online tool:

i = 0
count_i = json.SizeOfArray("responses")
Do While i < count_i
    json.I = i
    fullTextAnnotationText = json.StringOf("responses[i].fullTextAnnotation.text")
    j = 0
    count_j = json.SizeOfArray("responses[i].textAnnotations")
    Do While j < count_j
        json.J = j
        locale = json.StringOf("responses[i].textAnnotations[j].locale")
        description = json.StringOf("responses[i].textAnnotations[j].description")
        k = 0
        count_k = json.SizeOfArray("responses[i].textAnnotations[j].boundingPoly.vertices")
        Do While k < count_k
            json.K = k
            x = json.IntOf("responses[i].textAnnotations[j].boundingPoly.vertices[k].x")
            y = json.IntOf("responses[i].textAnnotations[j].boundingPoly.vertices[k].y")
            k = k + 1
        Loop
        j = j + 1
    Loop
    j = 0
    count_j = json.SizeOfArray("responses[i].fullTextAnnotation.pages")
    Do While j < count_j
        json.J = j
        width = json.IntOf("responses[i].fullTextAnnotation.pages[j].width")
        height = json.IntOf("responses[i].fullTextAnnotation.pages[j].height")
        k = 0
        count_k = json.SizeOfArray("responses[i].fullTextAnnotation.pages[j].property.detectedLanguages")
        Do While k < count_k
            json.K = k
            languageCode = json.StringOf("responses[i].fullTextAnnotation.pages[j].property.detectedLanguages[k].languageCode")
            k = k + 1
        Loop
        k = 0
        count_k = json.SizeOfArray("responses[i].fullTextAnnotation.pages[j].blocks")
        Do While k < count_k
            json.K = k
            blockType = json.StringOf("responses[i].fullTextAnnotation.pages[j].blocks[k].blockType")

            ' json1 is a Chilkat_9_5_0.JsonObject
            Set json1 = json.ObjectOf("responses[i].fullTextAnnotation.pages[j].blocks[k]")
            i1 = 0
            count_i1 = json1.SizeOfArray("property.detectedLanguages")
            Do While i1 < count_i1
                json1.I = i1
                languageCode = json1.StringOf("property.detectedLanguages[i].languageCode")
                i1 = i1 + 1
            Loop

            ' json1 is a Chilkat_9_5_0.JsonObject
            Set json1 = json.ObjectOf("responses[i].fullTextAnnotation.pages[j].blocks[k]")
            i1 = 0
            count_i1 = json1.SizeOfArray("boundingBox.vertices")
            Do While i1 < count_i1
                json1.I = i1
                x = json1.IntOf("boundingBox.vertices[i].x")
                y = json1.IntOf("boundingBox.vertices[i].y")
                i1 = i1 + 1
            Loop

            ' json1 is a Chilkat_9_5_0.JsonObject
            Set json1 = json.ObjectOf("responses[i].fullTextAnnotation.pages[j].blocks[k]")
            i1 = 0
            count_i1 = json1.SizeOfArray("paragraphs")
            Do While i1 < count_i1
                json1.I = i1
                j1 = 0
                count_j1 = json1.SizeOfArray("paragraphs[i].property.detectedLanguages")
                Do While j1 < count_j1
                    json1.J = j1
                    languageCode = json1.StringOf("paragraphs[i].property.detectedLanguages[j].languageCode")
                    j1 = j1 + 1
                Loop
                j1 = 0
                count_j1 = json1.SizeOfArray("paragraphs[i].boundingBox.vertices")
                Do While j1 < count_j1
                    json1.J = j1
                    x = json1.IntOf("paragraphs[i].boundingBox.vertices[j].x")
                    y = json1.IntOf("paragraphs[i].boundingBox.vertices[j].y")
                    j1 = j1 + 1
                Loop
                j1 = 0
                count_j1 = json1.SizeOfArray("paragraphs[i].words")
                Do While j1 < count_j1
                    json1.J = j1
                    k1 = 0
                    count_k1 = json1.SizeOfArray("paragraphs[i].words[j].property.detectedLanguages")
                    Do While k1 < count_k1
                        json1.K = k1
                        languageCode = json1.StringOf("paragraphs[i].words[j].property.detectedLanguages[k].languageCode")
                        k1 = k1 + 1
                    Loop
                    k1 = 0
                    count_k1 = json1.SizeOfArray("paragraphs[i].words[j].boundingBox.vertices")
                    Do While k1 < count_k1
                        json1.K = k1
                        x = json1.IntOf("paragraphs[i].words[j].boundingBox.vertices[k].x")
                        y = json1.IntOf("paragraphs[i].words[j].boundingBox.vertices[k].y")
                        k1 = k1 + 1
                    Loop
                    k1 = 0
                    count_k1 = json1.SizeOfArray("paragraphs[i].words[j].symbols")
                    Do While k1 < count_k1
                        json1.K = k1
                        text = json1.StringOf("paragraphs[i].words[j].symbols[k].text")
                        propertyDetectedBreakType = json1.StringOf("paragraphs[i].words[j].symbols[k].property.detectedBreak.type")

                        ' json2 is a Chilkat_9_5_0.JsonObject
                        Set json2 = json1.ObjectOf("paragraphs[i].words[j].symbols[k]")
                        i2 = 0
                        count_i2 = json2.SizeOfArray("property.detectedLanguages")
                        Do While i2 < count_i2
                            json2.I = i2
                            languageCode = json2.StringOf("property.detectedLanguages[i].languageCode")
                            i2 = i2 + 1
                        Loop

                        ' json2 is a Chilkat_9_5_0.JsonObject
                        Set json2 = json1.ObjectOf("paragraphs[i].words[j].symbols[k]")
                        i2 = 0
                        count_i2 = json2.SizeOfArray("boundingBox.vertices")
                        Do While i2 < count_i2
                            json2.I = i2
                            x = json2.IntOf("boundingBox.vertices[i].x")
                            y = json2.IntOf("boundingBox.vertices[i].y")
                            i2 = i2 + 1
                        Loop

                        k1 = k1 + 1
                    Loop
                    j1 = j1 + 1
                Loop
                i1 = i1 + 1
            Loop

            k = k + 1
        Loop
        j = j + 1
    Loop
    i = i + 1
Loop

outFile.WriteLine("Success.")

outFile.Close

 

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