Visual Basic 6.0
Visual Basic 6.0
Google Cloud Vision Text Detection
See more HTTP Misc Examples
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-textChilkat Visual Basic 6.0 Downloads
Dim success As Long
success = 0
' 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 this online tool to generate the code from sample JSON:
' Generate Code to Create JSON
' Load an image file.
Dim imageData As New ChilkatBinData
' This image file contains some text...
success = imageData.LoadFile("qa_data/jpg/text.jpg")
If (success <> 1) Then
Debug.Print "Failed to load image file."
Exit Sub
End If
' Create the above JSON.
Dim json As New ChilkatJsonObject
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
Dim http As New ChilkatHttp
http.SessionLogFilename = "c:/aaworkarea/sessionLog.txt"
Dim sb As New ChilkatStringBuilder
Dim url As String
url = "https://vision.googleapis.com/v1/images:annotate?key=YOUR_API_KEY"
Dim resp As New ChilkatHttpResponse
success = http.HttpJson("POST",url,json,"application/json",resp)
If (success = 0) Then
Debug.Print http.LastErrorText
Exit Sub
End If
Debug.Print "status = " & resp.StatusCode
' A 200 response status indicate success.
If (resp.StatusCode <> 200) Then
Debug.Print resp.BodyStr
Debug.Print "Failed."
Exit Sub
End If
Dim sbResponseBody As New ChilkatStringBuilder
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 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:
Dim i As Long
Dim count_i As Long
Dim fullTextAnnotationText As String
Dim j As Long
Dim count_j As Long
Dim locale As String
Dim description As String
Dim k As Long
Dim count_k As Long
Dim x As Long
Dim y As Long
Dim width As Long
Dim height As Long
Dim languageCode As String
Dim blockType As String
Dim i1 As Long
Dim count_i1 As Long
Dim j1 As Long
Dim count_j1 As Long
Dim k1 As Long
Dim count_k1 As Long
Dim text As String
Dim propertyDetectedBreakType As String
Dim i2 As Long
Dim count_i2 As Long
Dim json1 As New ChilkatJsonObject
Dim json2 As New ChilkatJsonObject
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")
success = json.ObjectOf2("responses[i].fullTextAnnotation.pages[j].blocks[k]",json1)
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
success = json.ObjectOf2("responses[i].fullTextAnnotation.pages[j].blocks[k]",json1)
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
success = json.ObjectOf2("responses[i].fullTextAnnotation.pages[j].blocks[k]",json1)
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")
success = json1.ObjectOf2("paragraphs[i].words[j].symbols[k]",json2)
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
success = json1.ObjectOf2("paragraphs[i].words[j].symbols[k]",json2)
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
Debug.Print "Success."