(SQL Server) 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

-- Important: See this note about string length limitations for strings returned by sp_OAMethod calls.
--
CREATE PROCEDURE ChilkatSample
AS
BEGIN
    DECLARE @hr int
    DECLARE @iTmp0 int
    -- Important: Do not use nvarchar(max).  See the warning about using nvarchar(max).
    DECLARE @sTmp0 nvarchar(4000)
    -- 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.
    DECLARE @imageData int
    -- Use "Chilkat_9_5_0.BinData" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.BinData', @imageData OUT
    IF @hr <> 0
    BEGIN
        PRINT 'Failed to create ActiveX component'
        RETURN
    END

    -- This image file contains some text...
    DECLARE @success int
    EXEC sp_OAMethod @imageData, 'LoadFile', @success OUT, 'qa_data/jpg/text.jpg'
    IF @success <> 1
      BEGIN

        PRINT 'Failed to load image file.'
        EXEC @hr = sp_OADestroy @imageData
        RETURN
      END

    -- Create the above JSON.
    DECLARE @json int
    -- Use "Chilkat_9_5_0.JsonObject" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.JsonObject', @json OUT

    EXEC sp_OAMethod @json, 'UpdateBd', @success OUT, 'requests[0].image.content', 'base64', @imageData
    EXEC sp_OAMethod @json, 'UpdateString', @success OUT, '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

    DECLARE @http int
    -- Use "Chilkat_9_5_0.Http" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.Http', @http OUT

    EXEC sp_OASetProperty @http, 'SessionLogFilename', 'c:/aaworkarea/sessionLog.txt'

    DECLARE @sb int
    -- Use "Chilkat_9_5_0.StringBuilder" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.StringBuilder', @sb OUT

    DECLARE @url nvarchar(4000)
    SELECT @url = 'https://vision.googleapis.com/v1/images:annotate?key=YOUR_API_KEY'
    DECLARE @resp int
    EXEC sp_OAMethod @http, 'PostJson3', @resp OUT, @url, 'application/json', @json
    EXEC sp_OAGetProperty @http, 'LastMethodSuccess', @iTmp0 OUT
    IF @iTmp0 <> 1
      BEGIN
        EXEC sp_OAGetProperty @http, 'LastErrorText', @sTmp0 OUT
        PRINT @sTmp0
        EXEC @hr = sp_OADestroy @imageData
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @http
        EXEC @hr = sp_OADestroy @sb
        RETURN
      END


    EXEC sp_OAGetProperty @resp, 'StatusCode', @iTmp0 OUT
    PRINT 'status = ' + @iTmp0

    -- A 200 response status indicate success.
    EXEC sp_OAGetProperty @resp, 'StatusCode', @iTmp0 OUT
    IF @iTmp0 <> 200
      BEGIN
        EXEC sp_OAGetProperty @resp, 'BodyStr', @sTmp0 OUT
        PRINT @sTmp0

        PRINT 'Failed.'
        EXEC @hr = sp_OADestroy @resp

        EXEC @hr = sp_OADestroy @imageData
        EXEC @hr = sp_OADestroy @json
        EXEC @hr = sp_OADestroy @http
        EXEC @hr = sp_OADestroy @sb
        RETURN
      END

    DECLARE @sbResponseBody int
    -- Use "Chilkat_9_5_0.StringBuilder" for versions of Chilkat < 10.0.0
    EXEC @hr = sp_OACreate 'Chilkat.StringBuilder', @sbResponseBody OUT

    EXEC sp_OAMethod @resp, 'GetBodySb', @success OUT, @sbResponseBody
    EXEC sp_OAMethod @sbResponseBody, 'WriteFile', @success OUT, 'qa_output/textDetectResponse.json', 'utf-8', 0
    EXEC sp_OAMethod @json, 'LoadSb', @success OUT, @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:

    DECLARE @i int

    DECLARE @count_i int

    DECLARE @fullTextAnnotationText nvarchar(4000)

    DECLARE @j int

    DECLARE @count_j int

    DECLARE @locale nvarchar(4000)

    DECLARE @description nvarchar(4000)

    DECLARE @k int

    DECLARE @count_k int

    DECLARE @x int

    DECLARE @y int

    DECLARE @width int

    DECLARE @height int

    DECLARE @languageCode nvarchar(4000)

    DECLARE @blockType nvarchar(4000)

    DECLARE @i1 int

    DECLARE @count_i1 int

    DECLARE @json1 int

    DECLARE @j1 int

    DECLARE @count_j1 int

    DECLARE @k1 int

    DECLARE @count_k1 int

    DECLARE @text nvarchar(4000)

    DECLARE @propertyDetectedBreakType nvarchar(4000)

    DECLARE @i2 int

    DECLARE @count_i2 int

    DECLARE @json2 int

    SELECT @i = 0
    EXEC sp_OAMethod @json, 'SizeOfArray', @count_i OUT, 'responses'
    WHILE @i < @count_i
      BEGIN
        EXEC sp_OASetProperty @json, 'I', @i
        EXEC sp_OAMethod @json, 'StringOf', @fullTextAnnotationText OUT, 'responses[i].fullTextAnnotation.text'
        SELECT @j = 0
        EXEC sp_OAMethod @json, 'SizeOfArray', @count_j OUT, 'responses[i].textAnnotations'
        WHILE @j < @count_j
          BEGIN
            EXEC sp_OASetProperty @json, 'J', @j
            EXEC sp_OAMethod @json, 'StringOf', @locale OUT, 'responses[i].textAnnotations[j].locale'
            EXEC sp_OAMethod @json, 'StringOf', @description OUT, 'responses[i].textAnnotations[j].description'
            SELECT @k = 0
            EXEC sp_OAMethod @json, 'SizeOfArray', @count_k OUT, 'responses[i].textAnnotations[j].boundingPoly.vertices'
            WHILE @k < @count_k
              BEGIN
                EXEC sp_OASetProperty @json, 'K', @k
                EXEC sp_OAMethod @json, 'IntOf', @x OUT, 'responses[i].textAnnotations[j].boundingPoly.vertices[k].x'
                EXEC sp_OAMethod @json, 'IntOf', @y OUT, 'responses[i].textAnnotations[j].boundingPoly.vertices[k].y'
                SELECT @k = @k + 1
              END
            SELECT @j = @j + 1
          END
        SELECT @j = 0
        EXEC sp_OAMethod @json, 'SizeOfArray', @count_j OUT, 'responses[i].fullTextAnnotation.pages'
        WHILE @j < @count_j
          BEGIN
            EXEC sp_OASetProperty @json, 'J', @j
            EXEC sp_OAMethod @json, 'IntOf', @width OUT, 'responses[i].fullTextAnnotation.pages[j].width'
            EXEC sp_OAMethod @json, 'IntOf', @height OUT, 'responses[i].fullTextAnnotation.pages[j].height'
            SELECT @k = 0
            EXEC sp_OAMethod @json, 'SizeOfArray', @count_k OUT, 'responses[i].fullTextAnnotation.pages[j].property.detectedLanguages'
            WHILE @k < @count_k
              BEGIN
                EXEC sp_OASetProperty @json, 'K', @k
                EXEC sp_OAMethod @json, 'StringOf', @languageCode OUT, 'responses[i].fullTextAnnotation.pages[j].property.detectedLanguages[k].languageCode'
                SELECT @k = @k + 1
              END
            SELECT @k = 0
            EXEC sp_OAMethod @json, 'SizeOfArray', @count_k OUT, 'responses[i].fullTextAnnotation.pages[j].blocks'
            WHILE @k < @count_k
              BEGIN
                EXEC sp_OASetProperty @json, 'K', @k
                EXEC sp_OAMethod @json, 'StringOf', @blockType OUT, 'responses[i].fullTextAnnotation.pages[j].blocks[k].blockType'

                EXEC sp_OAMethod @json, 'ObjectOf', @json1 OUT, 'responses[i].fullTextAnnotation.pages[j].blocks[k]'
                SELECT @i1 = 0
                EXEC sp_OAMethod @json1, 'SizeOfArray', @count_i1 OUT, 'property.detectedLanguages'
                WHILE @i1 < @count_i1
                  BEGIN
                    EXEC sp_OASetProperty @json1, 'I', @i1
                    EXEC sp_OAMethod @json1, 'StringOf', @languageCode OUT, 'property.detectedLanguages[i].languageCode'
                    SELECT @i1 = @i1 + 1
                  END
                EXEC @hr = sp_OADestroy @json1

                EXEC sp_OAMethod @json, 'ObjectOf', @json1 OUT, 'responses[i].fullTextAnnotation.pages[j].blocks[k]'
                SELECT @i1 = 0
                EXEC sp_OAMethod @json1, 'SizeOfArray', @count_i1 OUT, 'boundingBox.vertices'
                WHILE @i1 < @count_i1
                  BEGIN
                    EXEC sp_OASetProperty @json1, 'I', @i1
                    EXEC sp_OAMethod @json1, 'IntOf', @x OUT, 'boundingBox.vertices[i].x'
                    EXEC sp_OAMethod @json1, 'IntOf', @y OUT, 'boundingBox.vertices[i].y'
                    SELECT @i1 = @i1 + 1
                  END
                EXEC @hr = sp_OADestroy @json1

                EXEC sp_OAMethod @json, 'ObjectOf', @json1 OUT, 'responses[i].fullTextAnnotation.pages[j].blocks[k]'
                SELECT @i1 = 0
                EXEC sp_OAMethod @json1, 'SizeOfArray', @count_i1 OUT, 'paragraphs'
                WHILE @i1 < @count_i1
                  BEGIN
                    EXEC sp_OASetProperty @json1, 'I', @i1
                    SELECT @j1 = 0
                    EXEC sp_OAMethod @json1, 'SizeOfArray', @count_j1 OUT, 'paragraphs[i].property.detectedLanguages'
                    WHILE @j1 < @count_j1
                      BEGIN
                        EXEC sp_OASetProperty @json1, 'J', @j1
                        EXEC sp_OAMethod @json1, 'StringOf', @languageCode OUT, 'paragraphs[i].property.detectedLanguages[j].languageCode'
                        SELECT @j1 = @j1 + 1
                      END
                    SELECT @j1 = 0
                    EXEC sp_OAMethod @json1, 'SizeOfArray', @count_j1 OUT, 'paragraphs[i].boundingBox.vertices'
                    WHILE @j1 < @count_j1
                      BEGIN
                        EXEC sp_OASetProperty @json1, 'J', @j1
                        EXEC sp_OAMethod @json1, 'IntOf', @x OUT, 'paragraphs[i].boundingBox.vertices[j].x'
                        EXEC sp_OAMethod @json1, 'IntOf', @y OUT, 'paragraphs[i].boundingBox.vertices[j].y'
                        SELECT @j1 = @j1 + 1
                      END
                    SELECT @j1 = 0
                    EXEC sp_OAMethod @json1, 'SizeOfArray', @count_j1 OUT, 'paragraphs[i].words'
                    WHILE @j1 < @count_j1
                      BEGIN
                        EXEC sp_OASetProperty @json1, 'J', @j1
                        SELECT @k1 = 0
                        EXEC sp_OAMethod @json1, 'SizeOfArray', @count_k1 OUT, 'paragraphs[i].words[j].property.detectedLanguages'
                        WHILE @k1 < @count_k1
                          BEGIN
                            EXEC sp_OASetProperty @json1, 'K', @k1
                            EXEC sp_OAMethod @json1, 'StringOf', @languageCode OUT, 'paragraphs[i].words[j].property.detectedLanguages[k].languageCode'
                            SELECT @k1 = @k1 + 1
                          END
                        SELECT @k1 = 0
                        EXEC sp_OAMethod @json1, 'SizeOfArray', @count_k1 OUT, 'paragraphs[i].words[j].boundingBox.vertices'
                        WHILE @k1 < @count_k1
                          BEGIN
                            EXEC sp_OASetProperty @json1, 'K', @k1
                            EXEC sp_OAMethod @json1, 'IntOf', @x OUT, 'paragraphs[i].words[j].boundingBox.vertices[k].x'
                            EXEC sp_OAMethod @json1, 'IntOf', @y OUT, 'paragraphs[i].words[j].boundingBox.vertices[k].y'
                            SELECT @k1 = @k1 + 1
                          END
                        SELECT @k1 = 0
                        EXEC sp_OAMethod @json1, 'SizeOfArray', @count_k1 OUT, 'paragraphs[i].words[j].symbols'
                        WHILE @k1 < @count_k1
                          BEGIN
                            EXEC sp_OASetProperty @json1, 'K', @k1
                            EXEC sp_OAMethod @json1, 'StringOf', @text OUT, 'paragraphs[i].words[j].symbols[k].text'
                            EXEC sp_OAMethod @json1, 'StringOf', @propertyDetectedBreakType OUT, 'paragraphs[i].words[j].symbols[k].property.detectedBreak.type'

                            EXEC sp_OAMethod @json1, 'ObjectOf', @json2 OUT, 'paragraphs[i].words[j].symbols[k]'
                            SELECT @i2 = 0
                            EXEC sp_OAMethod @json2, 'SizeOfArray', @count_i2 OUT, 'property.detectedLanguages'
                            WHILE @i2 < @count_i2
                              BEGIN
                                EXEC sp_OASetProperty @json2, 'I', @i2
                                EXEC sp_OAMethod @json2, 'StringOf', @languageCode OUT, 'property.detectedLanguages[i].languageCode'
                                SELECT @i2 = @i2 + 1
                              END
                            EXEC @hr = sp_OADestroy @json2

                            EXEC sp_OAMethod @json1, 'ObjectOf', @json2 OUT, 'paragraphs[i].words[j].symbols[k]'
                            SELECT @i2 = 0
                            EXEC sp_OAMethod @json2, 'SizeOfArray', @count_i2 OUT, 'boundingBox.vertices'
                            WHILE @i2 < @count_i2
                              BEGIN
                                EXEC sp_OASetProperty @json2, 'I', @i2
                                EXEC sp_OAMethod @json2, 'IntOf', @x OUT, 'boundingBox.vertices[i].x'
                                EXEC sp_OAMethod @json2, 'IntOf', @y OUT, 'boundingBox.vertices[i].y'
                                SELECT @i2 = @i2 + 1
                              END
                            EXEC @hr = sp_OADestroy @json2

                            SELECT @k1 = @k1 + 1
                          END
                        SELECT @j1 = @j1 + 1
                      END
                    SELECT @i1 = @i1 + 1
                  END
                EXEC @hr = sp_OADestroy @json1

                SELECT @k = @k + 1
              END
            SELECT @j = @j + 1
          END
        SELECT @i = @i + 1
      END

    EXEC @hr = sp_OADestroy @resp


    PRINT 'Success.'

    EXEC @hr = sp_OADestroy @imageData
    EXEC @hr = sp_OADestroy @json
    EXEC @hr = sp_OADestroy @http
    EXEC @hr = sp_OADestroy @sb
    EXEC @hr = sp_OADestroy @sbResponseBody


END
GO