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multiple image ocr in swift

Murad_9288 answered on July 4, 2023 Popularity 1/10 Helpfulness 8/10

answer multiple image ocr in swift

multiple image ocr in swift

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To perform OCR (Optical Character Recognition) on multiple images in Swift, you can utilize the Text Vision Kit and process each image individually. Here's an example of how you can perform OCR on multiple images:

Set up the necessary imports and a function to handle OCR:

import Vision
func performOCR(on image: UIImage, completion: @escaping (String?) -> Void) {
    let textRecognitionRequest = VNRecognizeTextRequest { (request, error) in
        guard let observations = request.results as? [VNRecognizedTextObservation] else {
            completion(nil)
            return
        }
        
        var recognizedText = ""
        
        for observation in observations {
            guard let topCandidate = observation.topCandidates(1).first else { continue }
            recognizedText += topCandidate.string + "\n"
        }
        
        completion(recognizedText)
    }
    
    textRecognitionRequest.recognitionLevel = .accurate
    textRecognitionRequest.usesLanguageCorrection = true
    
    guard let cgImage = image.cgImage else {
        completion(nil)
        return
    }
    
    let handler = VNImageRequestHandler(cgImage: cgImage, options: [:])
    
    do {
        try handler.perform([textRecognitionRequest])
    } catch {
        completion(nil)
    }
}


Prepare an array of UIImage objects representing the images you want to perform OCR on:

let images: [UIImage] = [
    UIImage(named: "image1")!,
    UIImage(named: "image2")!,
    // Add more images as needed
]

Create a dispatch group to track the completion of OCR for each image: 
let group = DispatchGroup()
var recognizedTexts: [String?] = []

for image in images {
    group.enter()
    
    performOCR(on: image) { recognizedText in
        recognizedTexts.append(recognizedText)
        group.leave()
    }
}

group.notify(queue: .main) {
    // All OCR operations have completed
    // Access the recognized texts in the recognizedTexts array
    for (index, text) in recognizedTexts.enumerated() {
        if let recognizedText = text {
            print("Image \(index + 1):")
            print(recognizedText)
        } else {
            print("OCR failed for Image \(index + 1)")
        }
    }
}

Popularity 1/10 Helpfulness 8/10 Language swift

Source: chat.openai.com

Tags: image ocr swift

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Contributed on Jul 04 2023

Murad_9288

0 Answers Avg Quality 2/10

multiple image ocr in swift

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