Swift
Swift
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 Swift Downloads
func chilkatTest() {
var success: Bool = false
// 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.
let imageData = CkoBinData()!
// This image file contains some text...
success = imageData.loadFile(path: "qa_data/jpg/text.jpg")
if success != true {
print("Failed to load image file.")
return
}
// Create the above JSON.
let json = CkoJsonObject()!
json.updateBd(jsonPath: "requests[0].image.content", encoding: "base64", bd: imageData)
json.updateString(jsonPath: "requests[0].features[0].type", value: "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
let http = CkoHttp()!
http.sessionLogFilename = "c:/aaworkarea/sessionLog.txt"
let sb = CkoStringBuilder()!
var url: String? = "https://vision.googleapis.com/v1/images:annotate?key=YOUR_API_KEY"
let resp = CkoHttpResponse()!
success = http.httpJson(verb: "POST", url: url, json: json, contentType: "application/json", response: resp)
if success == false {
print("\(http.lastErrorText!)")
return
}
print("status = \(resp.statusCode.intValue)")
// A 200 response status indicate success.
if resp.statusCode.intValue != 200 {
print("\(resp.bodyStr!)")
print("Failed.")
return
}
let sbResponseBody = CkoStringBuilder()!
resp.getBodySb(sb: sbResponseBody)
sbResponseBody.writeFile(path: "qa_output/textDetectResponse.json", charset: "utf-8", emitBom: false)
json.loadSb(sb: 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:
var i: Int
var count_i: Int
var fullTextAnnotationText: String?
var j: Int
var count_j: Int
var locale: String?
var description: String?
var k: Int
var count_k: Int
var x: Int
var y: Int
var width: Int
var height: Int
var languageCode: String?
var blockType: String?
var i1: Int
var count_i1: Int
var j1: Int
var count_j1: Int
var k1: Int
var count_k1: Int
var text: String?
var propertyDetectedBreakType: String?
var i2: Int
var count_i2: Int
let json1 = CkoJsonObject()!
let json2 = CkoJsonObject()!
i = 0
count_i = json.size(ofArray: "responses").intValue
while i < count_i {
json.i = i
fullTextAnnotationText = json.string(of: "responses[i].fullTextAnnotation.text")
j = 0
count_j = json.size(ofArray: "responses[i].textAnnotations").intValue
while j < count_j {
json.j = j
locale = json.string(of: "responses[i].textAnnotations[j].locale")
description = json.string(of: "responses[i].textAnnotations[j].description")
k = 0
count_k = json.size(ofArray: "responses[i].textAnnotations[j].boundingPoly.vertices").intValue
while k < count_k {
json.k = k
x = json.int(of: "responses[i].textAnnotations[j].boundingPoly.vertices[k].x").intValue
y = json.int(of: "responses[i].textAnnotations[j].boundingPoly.vertices[k].y").intValue
k = k + 1
}
j = j + 1
}
j = 0
count_j = json.size(ofArray: "responses[i].fullTextAnnotation.pages").intValue
while j < count_j {
json.j = j
width = json.int(of: "responses[i].fullTextAnnotation.pages[j].width").intValue
height = json.int(of: "responses[i].fullTextAnnotation.pages[j].height").intValue
k = 0
count_k = json.size(ofArray: "responses[i].fullTextAnnotation.pages[j].property.detectedLanguages").intValue
while k < count_k {
json.k = k
languageCode = json.string(of: "responses[i].fullTextAnnotation.pages[j].property.detectedLanguages[k].languageCode")
k = k + 1
}
k = 0
count_k = json.size(ofArray: "responses[i].fullTextAnnotation.pages[j].blocks").intValue
while k < count_k {
json.k = k
blockType = json.string(of: "responses[i].fullTextAnnotation.pages[j].blocks[k].blockType")
json.objectOf2(jsonPath: "responses[i].fullTextAnnotation.pages[j].blocks[k]", jsonObj: json1)
i1 = 0
count_i1 = json1.size(ofArray: "property.detectedLanguages").intValue
while i1 < count_i1 {
json1.i = i1
languageCode = json1.string(of: "property.detectedLanguages[i].languageCode")
i1 = i1 + 1
}
json.objectOf2(jsonPath: "responses[i].fullTextAnnotation.pages[j].blocks[k]", jsonObj: json1)
i1 = 0
count_i1 = json1.size(ofArray: "boundingBox.vertices").intValue
while i1 < count_i1 {
json1.i = i1
x = json1.int(of: "boundingBox.vertices[i].x").intValue
y = json1.int(of: "boundingBox.vertices[i].y").intValue
i1 = i1 + 1
}
json.objectOf2(jsonPath: "responses[i].fullTextAnnotation.pages[j].blocks[k]", jsonObj: json1)
i1 = 0
count_i1 = json1.size(ofArray: "paragraphs").intValue
while i1 < count_i1 {
json1.i = i1
j1 = 0
count_j1 = json1.size(ofArray: "paragraphs[i].property.detectedLanguages").intValue
while j1 < count_j1 {
json1.j = j1
languageCode = json1.string(of: "paragraphs[i].property.detectedLanguages[j].languageCode")
j1 = j1 + 1
}
j1 = 0
count_j1 = json1.size(ofArray: "paragraphs[i].boundingBox.vertices").intValue
while j1 < count_j1 {
json1.j = j1
x = json1.int(of: "paragraphs[i].boundingBox.vertices[j].x").intValue
y = json1.int(of: "paragraphs[i].boundingBox.vertices[j].y").intValue
j1 = j1 + 1
}
j1 = 0
count_j1 = json1.size(ofArray: "paragraphs[i].words").intValue
while j1 < count_j1 {
json1.j = j1
k1 = 0
count_k1 = json1.size(ofArray: "paragraphs[i].words[j].property.detectedLanguages").intValue
while k1 < count_k1 {
json1.k = k1
languageCode = json1.string(of: "paragraphs[i].words[j].property.detectedLanguages[k].languageCode")
k1 = k1 + 1
}
k1 = 0
count_k1 = json1.size(ofArray: "paragraphs[i].words[j].boundingBox.vertices").intValue
while k1 < count_k1 {
json1.k = k1
x = json1.int(of: "paragraphs[i].words[j].boundingBox.vertices[k].x").intValue
y = json1.int(of: "paragraphs[i].words[j].boundingBox.vertices[k].y").intValue
k1 = k1 + 1
}
k1 = 0
count_k1 = json1.size(ofArray: "paragraphs[i].words[j].symbols").intValue
while k1 < count_k1 {
json1.k = k1
text = json1.string(of: "paragraphs[i].words[j].symbols[k].text")
propertyDetectedBreakType = json1.string(of: "paragraphs[i].words[j].symbols[k].property.detectedBreak.type")
json1.objectOf2(jsonPath: "paragraphs[i].words[j].symbols[k]", jsonObj: json2)
i2 = 0
count_i2 = json2.size(ofArray: "property.detectedLanguages").intValue
while i2 < count_i2 {
json2.i = i2
languageCode = json2.string(of: "property.detectedLanguages[i].languageCode")
i2 = i2 + 1
}
json1.objectOf2(jsonPath: "paragraphs[i].words[j].symbols[k]", jsonObj: json2)
i2 = 0
count_i2 = json2.size(ofArray: "boundingBox.vertices").intValue
while i2 < count_i2 {
json2.i = i2
x = json2.int(of: "boundingBox.vertices[i].x").intValue
y = json2.int(of: "boundingBox.vertices[i].y").intValue
i2 = i2 + 1
}
k1 = k1 + 1
}
j1 = j1 + 1
}
i1 = i1 + 1
}
k = k + 1
}
j = j + 1
}
i = i + 1
}
print("Success.")
}