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//
// main.swift
// OCRImage
//
// Created on 04/03/2021.
//
import Foundation
import ArgumentParser
import Vision
import AppKit
class TextPiece {
var text:String?;
var topLeft:CGPoint;
var topRight:CGPoint;
var bottomLeft:CGPoint;
var bottomRIght:CGPoint;
init() {
self.text = "Empty";
self.topLeft = CGPoint(x:0,y:0);
self.topRight = CGPoint(x:0,y:0);
self.bottomLeft = CGPoint(x:0,y:0);
self.bottomRIght = CGPoint(x:0,y:0);
}
init(_ t: String, _ tl:CGPoint, _ tr:CGPoint, _ bl:CGPoint, _ br: CGPoint ) {
self.text = t;
self.topLeft = tl;
self.topRight = tr;
self.bottomLeft = bl;
self.bottomRIght = br;
}
func set(_ t: String, _ tl:CGPoint, _ tr:CGPoint, _ bl:CGPoint, _ br: CGPoint) {
self.text = t;
self.topLeft = tl;
self.topRight = tr;
self.bottomLeft = bl;
self.bottomRIght = br;
}
}
class TextOCR {
var pieces:[TextPiece] = []
init() {
}
func recognizeImageUrl(_ url:URL, _ error: Error?) {
var pieces:[TextPiece] = []
var err:NSError?
var textRequest = VNRecognizeTextRequest(completionHandler: recognizeTextHandler(request:error:))
var handler = VNImageRequestHandler(url: url)
do {
try handler.perform([textRequest])
} catch {
print("Cannot perfom request error:\(error)")
}
}
func handleTextRequest(_ request: VNRequest, error: Error?) {
}
func recognizeTextHandler(request: VNRequest, error: Error?) {
print("Start recognize handler")
guard let observations =
request.results as? [VNRecognizedTextObservation] else {
return
}
let recognizedStrings = observations.compactMap { observation in
// Return the string of the top VNRecognizedText instance.
return observation.topCandidates(1).first?.string
}
print("\(recognizedStrings)")
}
}
print("Start program")
let stderr = FileHandle.standardError
if #available(macOS 10.15,*) {} else {
//Output to stderr if os version is not supported
stderr.write("Version of MacOS should be >=10.15".data(using: .utf8)!)
exit(0)
}
struct OCROptions : ParsableArguments {
@Option(help:"Input file for OCR")
var inputFile:String?
@Flag(name: .shortAndLong, help:"Show extra debugion info")
var debug=false
@Flag(name:.shortAndLong, help:"Show current version")
var version=false
}
let options = OCROptions.parseOrExit()
//Print version version and quit
if options.version {
print("Version: 0.0.2")
exit(0)
}
guard let inputFile = options.inputFile else {
print("ERROR: Set --input-file command argument to image")
exit(0)
}
if options.debug {
print("OCR Input file: \(inputFile)")
}
//return true if file excists
func checkIfFileExists(_ fname: String) -> Bool {
let fm = FileManager.default
if fm.fileExists(atPath: fname) {
return true
}
return false
}
//get current run directory
func getCurrentExecutableDir() -> String {
return Process().currentDirectoryPath
}
var executionPath = getCurrentExecutableDir()
var fm_full_path = FileManager.default
fm_full_path.changeCurrentDirectoryPath(executionPath)
var inputURL = URL(fileURLWithPath: fm_full_path.currentDirectoryPath)
inputURL.appendPathComponent(inputFile)
var composePath = "/"+inputURL.pathComponents.filter { ($0 != ".") && ($0 != "/") }.joined(separator: "/")
if (options.debug) {
print(composePath)
print(checkIfFileExists(composePath))
print(getCurrentExecutableDir())
print(executionPath)
}
//load image
var composeUrl:URL? = nil
if checkIfFileExists(composePath) {
composeUrl = URL(fileURLWithPath: composePath)
} else if checkIfFileExists(inputFile) {
composeUrl = URL(fileURLWithPath: inputFile)
} else {
print("Canot open file path \(inputFile)")
exit(0)
}
let image = NSImage(contentsOf: composeUrl!)
if (image == nil) {
stderr.write("Cannot load image properly \(composeUrl!)".data(using: .utf8)!)
exit(0)
}
//Start text recognition request
var ocr = TextOCR()
var err:NSError?
ocr.recognizeImageUrl(composeUrl!, err)
print("End programm")
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