Tesseract OCR LED/LCD display text recognition

[NandhiniYeganathan]

Current Behavior

Hi All,
I am trying to detect the numeric values from the digital display LED/LCD(Remote and other devices). Integrated the tesseract along with GPUImage and used the trained data. But it's not giving a proper result. Integration using Swift(iOS).

Here is the code:

let tesseract: G8Tesseract = G8Tesseract(language: "eng")!


tesseract.delegate = self


tesseract.charWhitelist = "0123456789:"


tesseract.charBlacklist = "abcdefghijklmnopqrstuvwxyz_+-=/?.,><()*&^%$#@!:;"


let imageCheck = UIImage(named: "remote1.jpg")//Sample image, but we need to capture the image from camera then used it


let scaledImage = newImage?.scaledImage(1000)

let preprocessedImage = scaledImage?.preprocessedImage() ?? scaledImage

if let tesseract = G8Tesseract(language: "eng") {

tesseract.engineMode = .tesseractOnly

tesseract.pageSegmentationMode = .auto
//Auto Adjustment to Input Image
var inputImage = CIImage(image: preprocessedImage!)
let options:[CIImageAutoAdjustmentOption : AnyObject] = [.enhance:1 as AnyObject]
let filters = inputImage!.autoAdjustmentFilters(options: options)

    for filter: CIFilter in filters {
       filter.setValue(inputImage, forKey: kCIInputImageKey)
   inputImage =  filter.outputImage
      }
    let cgImage = context.createCGImage(inputImage!, from: inputImage!.extent)
    tesseract.image =  UIImage(cgImage: cgImage!)

    //Apply noir Filter
    let currentFilter = CIFilter(name: "CIPhotoEffectTonal")
    currentFilter!.setValue(CIImage(image: UIImage(cgImage: cgImage!)), forKey: kCIInputImageKey)

    let output = currentFilter!.outputImage
    let cgimg = context.createCGImage(output!, from: output!.extent)
    let processedImage = UIImage(cgImage: cgimg!)
    tesseract.image = processedImage
   // tesseract.image = preprocessedImage!
    tesseract.recognize()
    debugPrint("Text: \(String(describing: tesseract.recognizedText))")

}
Scaled image reference get from: https://www.kodeco.com/2010498-tesseract-ocr-tutorial-for-ios

O/P which is am getting:
Optional(" 9 9\n 11593 7\n 1 80\n \n0\n5533\n\n")"

Expected Behavior

Expected Output: 25, 5:21

Suggested Fix

No response

tesseract -v

No response

Operating System

macOS 14 Sonoma

Other Operating System

No response

uname -a

No response

Compiler

No response

CPU

No response

Virtualization / Containers

No response

Other Information

Could you please anyone guide me to resolve this

Thanks!