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「QRコード読み取り?楽勝ですよ😙」=>「AVFoundationを信じたおれがバカだった😇」 / iOSDC 2018
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monoqlo
September 01, 2018
Programming
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「QRコード読み取り?楽勝ですよ😙」=>「AVFoundationを信じたおれがバカだった😇」 / iOSDC 2018
iOSDC 2018 2018/09/01 14:40〜 Track B レギュラートーク(15分)
monoqlo
September 01, 2018
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Transcript
@monoqlo QRίʔυಡΈऔΓʁ ָউͰ͢Α AVFoundationΛ৴ͨ͡ ͓Ε͕όΧͩͬͨ
None
ḪΔ͜ͱ ಥવͰ͕͢
1
2017 3 ݄
ָউͰ͢Α✌✌ QRίʔυಡΈऔΔ ΞϓϦͭ͘ΕΔʁ
͜ͷ࣌ߟ͍͑ͯͨ͜ͱ
AVFoundation Ͱ༨༟Ͱ͠ΐ • AVCaptureSession • AVCaptureMetadataOutput • AVMetadataMachineReadableCodeObject • etc…
QRίʔυ ͞Εͨ
https://www.55truck.com/shaken.html
https://www.55truck.com/shaken.html
None
"8/-/1/-/- /- /999999/02” "2/- //160114/1001/BKG-NKR85” "AN/0168/- /- /0381/13/09” "2/ɹɹ̔̌̌ͤ̒̐̎” “̒/1/NKR85-7011300/4JJ1/1"
http://mangalifewin.takeshobo.co.jp/rensai/popute3/
"8/-/1/-/- /- /999999/02” "2/- //160114/1001/BKG-NKR85” "AN/0168/- /- /0381/13/09” "2/ɹɹ̔̌̌ͤ̒̐̎” “̒/1/NKR85-7011300/4JJ1/1"
"2/- //160114/1001/BKG-NKR85AN/0168/- /- /0381/13/098/-/1/-/- /- /999999/02” "2/ɹɹ̔̌̌ͤ̒̐̎̒/1/NKR85-7011300/4JJ1/1”
φχϞϊ ͜Ε…
None
http://www.qrcode.com
None
ͬͱ QRίʔυ ΛΖ͏
ใٕज़ʵࣗಈೝࣝٴͼσʔλऔಘٕज़ʵ ̧̦ίʔυόʔίʔυγϯϘϧମܥ༷ JIS ن֨ X0510
http://www.jisc.go.jp/
શ 115 ϖʔδ…
QRίʔυͷΈ μΠδΣετ൛
ࠇനϞδϡʔϧͷೝࣝ START ܕࣜใͷ෮߸ ܕ൪ͷܾఆ ϚεΫॲཧͷղআ σʔλ & ޡΓగਖ਼ίʔυޠͷ෮ݩ
ޡΓగਖ਼ ޡΓݕग़ σʔλΛ෮߸ σʔλೖख END ޡΓφγ ޡΓΞϦ
“Ϟʔυ” ղऍ ෮߸͢ΔͨΊʹॏཁͳͷ͕
“Ϟʔυ” ͱ
• ECI • ߏత࿈ • FNC1 • (ऴύλʔϯ) • ࣈ
• ӳࣈ • 8ϏοτόΠτ • ࣈ Ϟʔυ = σʔλΛ֨ೲ͢Δܗࣜ • ѹॖޮ্Λతͱ͠ɺଟͷϞʔυ͕ఆٛ͞Ε͍ͯΔ • QRίʔυੜ࣌ɺσʔλʹ߹Θͤͯ࠷దͳͷΛબ͢Δ • ϔομʔͱͯ͠จࣈࢦࣔࢠͱͱʹσʔλʹՃ͢Δ • Έ߹Θͤͯ༻Մʢex. ӳࣈ + ࣈʣ ߏత࿈
• ࣈ • ӳࣈ • 8ϏοτόΠτ • ࣈ • ECI
• ߏత࿈ • FNC1 • (ऴύλʔϯ) Ϟʔυ = σʔλΛ֨ೲ͢Δܗࣜ • ѹॖޮ্Λతͱ͠ɺଟͷϞʔυ͕ఆٛ͞Ε͍ͯΔ • QRίʔυੜ࣌ɺσʔλʹ߹Θͤͯ࠷దͳͷΛબ͢Δ • ϔομʔͱͯ͠จࣈࢦࣔࢠͱͱʹσʔλʹՃ͢Δ • Έ߹Θͤͯ༻Մʢex. ӳࣈ + ࣈʣ ߏత࿈
ߏత࿈ Ϟʔυ
ϔομʔ༷ 1. Ϟʔυࢦࣔࢠʢ0011ʣɿ4bit 2. γϯϘϧྻࢦࣔࢠɿ8bit 1. γϯϘϧҐஔɿ4bit 2. ࿈݁͞ΕΔγϯϘϧͷ߹ܭɿ4bit 3.
ύϦςΟɿ8bit ׂલͷσʔλΛόΠτ͝ͱʹXORԋࢉͨ͠
None
ϓϩύςΟ var corners: [CGPoint] A Swift array of corner points.
var stringValue: String? Returns the error corrected data decoded into a human- readable string.
ͦΜͳͷͳ͍ AVMetadataMachineReadableCodeObject ʹ
ࠇനϞδϡʔϧͷೝࣝ START ܕࣜใͷ෮߸ ܕ൪ͷܾఆ ϚεΫॲཧͷղআ σʔλ & ޡΓగਖ਼ίʔυޠͷ෮ݩ
ޡΓగਖ਼ ޡΓݕग़ σʔλΛ෮߸ σʔλೖख END ޡΓφγ ޡΓΞϦ AVMetadataMachine ReadableCodeObject ͷ
stringValue ෳ߹ޙͷίϨ
ϥΠϒϥϦΛ୳͢ ߏత࿈Λ͏·͘ѻ͑Δ
None Swift ͷϥΠϒϥϦ
None
ZXingObjC ٹੈओ TheLevelUp/ZXingObjC: An Objective-C Port of ZXing
γϯϘϧҐஔ/߹ܭͱύϦςΟ͕औΕΔ @objc func captureResult(_ capture: ZXCapture!, result: ZXResult!) { guard
let _ = result else { return } // ׂQRίʔυͷ߹ɺZXResult#resultMetadata ͷҎԼ2ͭΛ֬ೝͯ͠ // Ͳͷ෦ͷQRίʔυ͕ಡΈࠐ·Εͨͷ͔ఆ͢Δ͜ͱ͕Ͱ͖Δ // - kResultMetadataTypeStructuredAppendSequence // - kResultMetadataTypeStructuredAppendParity guard let metaData = result.resultMetadata, let sequenceValue = metaData[Int(kResultMetadataTypeStructuredAppendSequence.rawValue)] as? Int, let parity = metaData[Int(kResultMetadataTypeStructuredAppendParity.rawValue)] as? Int else { return } // sequence: ಡΈऔͬͨQRίʔυͷ൪߸ 4bit + τʔλϧͷQRίʔυ 4bit let bit = String(sequenceValue, radix: 2) let pad = String(repeating: "0", count: (8 - bit.count)) let sequence = pad + bit let current = Int(sequence.prefix(4), radix: 2)! let total = Int(sequence.suffix(from: 4), radix: 2)! … } @objc func captureResult(_ capture: ZXCapture!, result: ZXResult!) { guard let _ = result else { return } // ׂQRίʔυͷ߹ɺZXResult#resultMetadata ͷҎԼ2ͭΛ֬ೝͯ͠ // Ͳͷ෦ͷQRίʔυ͕ಡΈࠐ·Εͨͷ͔ఆ͢Δ͜ͱ͕Ͱ͖Δ // - kResultMetadataTypeStructuredAppendSequence // - kResultMetadataTypeStructuredAppendParity
γϯϘϧҐஔ/߹ܭͱύϦςΟ͕औΕΔ @objc func captureResult(_ capture: ZXCapture!, result: ZXResult!) { guard
let _ = result else { return } // ׂQRίʔυͷ߹ɺZXResult#resultMetadata ͷҎԼ2ͭΛ֬ೝͯ͠ // Ͳͷ෦ͷQRίʔυ͕ಡΈࠐ·Εͨͷ͔ఆ͢Δ͜ͱ͕Ͱ͖Δ // - kResultMetadataTypeStructuredAppendSequence // - kResultMetadataTypeStructuredAppendParity guard let metaData = result.resultMetadata, let sequenceValue = metaData[Int(kResultMetadataTypeStructuredAppendSequence.rawValue)] as? Int, let parity = metaData[Int(kResultMetadataTypeStructuredAppendParity.rawValue)] as? Int else { return } // sequence: ಡΈऔͬͨQRίʔυͷ൪߸ 4bit + τʔλϧͷQRίʔυ 4bit let bit = String(sequenceValue, radix: 2) let pad = String(repeating: "0", count: (8 - bit.count)) let sequence = pad + bit let current = Int(sequence.prefix(4), radix: 2)! let total = Int(sequence.suffix(from: 4), radix: 2)! … } @objc func captureResult(_ capture: ZXCapture!, result: ZXResult!) { guard let _ = result else { return } // ׂQRίʔυͷ߹ɺZXResult#resultMetadata ͷҎԼ2ͭΛ֬ೝͯ͠ // Ͳͷ෦ͷQRίʔυ͕ಡΈࠐ·Εͨͷ͔ఆ͢Δ͜ͱ͕Ͱ͖Δ // - kResultMetadataTypeStructuredAppendSequence // - kResultMetadataTypeStructuredAppendParity guard let metaData = result.resultMetadata, let sequenceValue = metaData[Int(kResultMetadataTypeStructuredAppendSequence.rawValue)] as? Int, let parity = metaData[Int(kResultMetadataTypeStructuredAppendParity.rawValue)] as? Int else { return }
γϯϘϧҐஔ/߹ܭͱύϦςΟ͕औΕΔ @objc func captureResult(_ capture: ZXCapture!, result: ZXResult!) { guard
let _ = result else { return } // ׂQRίʔυͷ߹ɺZXResult#resultMetadata ͷҎԼ2ͭΛ֬ೝͯ͠ // Ͳͷ෦ͷQRίʔυ͕ಡΈࠐ·Εͨͷ͔ఆ͢Δ͜ͱ͕Ͱ͖Δ // - kResultMetadataTypeStructuredAppendSequence // - kResultMetadataTypeStructuredAppendParity guard let metaData = result.resultMetadata, let sequenceValue = metaData[Int(kResultMetadataTypeStructuredAppendSequence.rawValue)] as? Int, let parity = metaData[Int(kResultMetadataTypeStructuredAppendParity.rawValue)] as? Int else { return } // sequence: ಡΈऔͬͨQRίʔυͷ൪߸ 4bit + τʔλϧͷQRίʔυ 4bit let bit = String(sequenceValue, radix: 2) let pad = String(repeating: "0", count: (8 - bit.count)) let sequence = pad + bit let current = Int(sequence.prefix(4), radix: 2)! let total = Int(sequence.suffix(from: 4), radix: 2)! … } @objc func captureResult(_ capture: ZXCapture!, result: ZXResult!) { guard let _ = result else { return } // ׂQRίʔυͷ߹ɺZXResult#resultMetadata ͷҎԼ2ͭΛ֬ೝͯ͠ // Ͳͷ෦ͷQRίʔυ͕ಡΈࠐ·Εͨͷ͔ఆ͢Δ͜ͱ͕Ͱ͖Δ // - kResultMetadataTypeStructuredAppendSequence // - kResultMetadataTypeStructuredAppendParity guard let metaData = result.resultMetadata, let sequenceValue = metaData[Int(kResultMetadataTypeStructuredAppendSequence.rawValue)] as? Int, let parity = metaData[Int(kResultMetadataTypeStructuredAppendParity.rawValue)] as? Int else { return } // sequence: ಡΈऔͬͨQRίʔυͷ൪߸ 4bit + τʔλϧͷQRίʔυ 4bit let bit = String(sequenceValue, radix: 2) let pad = String(repeating: "0", count: (8 - bit.count)) let sequence = pad + bit let current = Int(sequence.prefix(4), radix: 2)! let total = Int(sequence.suffix(from: 4), radix: 2)! … }
γϯϘϧҐஔ/߹ܭͱύϦςΟ͕औΕΔ @objc func captureResult(_ capture: ZXCapture!, result: ZXResult!) { guard
let _ = result else { return } // ׂQRίʔυͷ߹ɺZXResult#resultMetadata ͷҎԼ2ͭΛ֬ೝͯ͠ // Ͳͷ෦ͷQRίʔυ͕ಡΈࠐ·Εͨͷ͔ఆ͢Δ͜ͱ͕Ͱ͖Δ // - kResultMetadataTypeStructuredAppendSequence // - kResultMetadataTypeStructuredAppendParity guard let metaData = result.resultMetadata, let sequenceValue = metaData[Int(kResultMetadataTypeStructuredAppendSequence.rawValue)] as? Int, let parity = metaData[Int(kResultMetadataTypeStructuredAppendParity.rawValue)] as? Int else { return } // sequence: ಡΈऔͬͨQRίʔυͷ൪߸ 4bit + τʔλϧͷQRίʔυ 4bit let bit = String(sequenceValue, radix: 2) let pad = String(repeating: "0", count: (8 - bit.count)) let sequence = pad + bit let current = Int(sequence.prefix(4), radix: 2)! let total = Int(sequence.suffix(from: 4), radix: 2)! … } @objc func captureResult(_ capture: ZXCapture!, result: ZXResult!) { guard let _ = result else { return } // ׂQRίʔυͷ߹ɺZXResult#resultMetadata ͷҎԼ2ͭΛ֬ೝͯ͠ // Ͳͷ෦ͷQRίʔυ͕ಡΈࠐ·Εͨͷ͔ఆ͢Δ͜ͱ͕Ͱ͖Δ // - kResultMetadataTypeStructuredAppendSequence // - kResultMetadataTypeStructuredAppendParity // sequence: ಡΈऔͬͨQRίʔυͷ൪߸ 4bit + τʔλϧͷQRίʔυ 4bit let bit = String(sequenceValue, radix: 2) let pad = String(repeating: "0", count: (8 - bit.count)) let sequence = pad + bit let current = Int(sequence.prefix(4), radix: 2)! let total = Int(sequence.suffix(from: 4), radix: 2)! … } guard let metaData = result.resultMetadata, let sequenceValue = metaData[Int(kResultMetadataTypeStructuredAppendSequence.rawValue)] as? Int, let parity = metaData[Int(kResultMetadataTypeStructuredAppendParity.rawValue)] as? Int else { return }
ղܾ ͬͨʔʂʂ
ຊʹʁ
ZXingObjC ͷऑ • ಡΈऔΓਫ਼͕͋·Γߴ͘ͳ͍ • AVFoundation σϯιʔެࣜΞϓϦʹൺΔͱ݁ߏ ͕͔͔࣌ؒΔ͜ͱ͕͋Δ • ։ൃ͕࣮࣭ࢭ·͍ͬͯΔ
• Swift ʹஔ͖͍͑ͨͱ͔ॻ͔ΕͯΔ͚Ͳ͍ͭʹͳΔ ͔·ͬͨ͘Θ͔Βͳ͍
ઈ ະདྷ͕ͳ͍
ઈ ະདྷ͕ͳ͍ ʁ
ઈ ະདྷ͕ͳ͍ ʁ 2017 ·Ͱͷ͓
࣌ྲྀΕ… 2018 9 ݄ 1
iOS ͷόʔδϣϯγΣΞભҠ ݄ ݄ ݄
݄ ݄ ݄ ݄ ݄ ݄ iOS 11 iOS 10 iOS 9 or Earlier ※ 20189݄༧ଌ
iOS 10 ͷαϙʔτ ͦΖͦΖΕ·͢ΑͶʁ ࠓ݄ iOS 12 ͕ϦϦʔε͞Ε·͢
CIQRCodeDescriptor ਅͷٹੈओ in AVMetadataMachineReadableCodeObject
ϓϩύςΟ var corners: [CGPoint] A Swift array of corner points.
var stringValue: String? Returns the error corrected data decoded into a human- readable string. var descriptor: CIBarcodeDescriptor? A barcode description for use in Core Image.
CIQRCodeDescriptor ͱ
CIQRCodeDescriptor ͱ • iOS 11 ͰՃ͞ΕͨڧྗͳΫϥε • நΫϥε CIBarcodeDescriptor ͷαϒΫϥε
• QRίʔυΛੜ͢ΔͨΊʹඞཁेͳσʔλΛ࣋ͭ • CIFilter Ͱ QRίʔυը૾Λੜ͢Δ͜ͱͰ͖Δ
CIQRCodeDescriptor ͱ • iOS 11 ͰՃ͞ΕͨڧྗͳΫϥε • நΫϥε CIBarcodeDescriptor ͷαϒΫϥε
• CIFilter Ͱ QRίʔυը૾Λੜ͢Δ͜ͱͰ͖Δ func generateQRCodeImage(from descriptor: CIQRCodeDescriptor) -> UIImage? { let inputParams: [String: Any] = ["inputBarcodeDescriptor": descriptor] let barcodeCreationFilter = CIFilter(name: "CIBarcodeGenerator", parameters: inputParams) guard let outputImage = barcodeCreationFilter?.outputImage, let cgImage = CIContext().createCGImage(outputImage, from: outputImage.extent) else { return nil } return UIImage(cgImage: cgImage) }
େࣄͳͷ͜ͷ 2 ͭ var errorCorrectedPayload: Data The error-corrected payload containing
the data encoded in the QR code. var symbolVersion: Int The version of the QR code.
ࠇനϞδϡʔϧͷೝࣝ START ܕࣜใͷ෮߸ ܕ൪ͷܾఆ ϚεΫॲཧͷղআ σʔλ & ޡΓగਖ਼ίʔυޠͷ෮ݩ
ޡΓగਖ਼ ޡΓݕग़ σʔλΛ෮߸ σʔλೖख END ޡΓφγ ޡΓΞϦ AVMetadataMachine ReadableCodeObject ͷ
stringValue ෳ߹ޙͷίϨ
ޡΓగਖ਼ ޡΓݕग़ σʔλΛ෮߸ σʔλೖख END ޡΓφγ ޡΓΞϦ errorCorrectedPayload ίίͷσʔλʂ
େࣄͳͷ͜ͷ 2 ͭ var errorCorrectedPayload: Data The error-corrected payload containing
the data encoded in the QR code. var symbolVersion: Int The version of the QR code.
େࣄͳͷ͜ͷ 2 ͭ var errorCorrectedPayload: Data The error-corrected payload containing
the data encoded in the QR code. var symbolVersion: Int The version of the QR code.
จࣈࢦࣔࢠͷϏοτ ܕ൪ TZNCPM7FSTJPO ࣈ Ϟʔυ ӳࣈ Ϟʔυ ϏοτόΠτ Ϟʔυ ࣈ
Ϟʔυ ʙ ʙ ʙ
symbolVersion + errorCorrectedPayload σίʔυͰ͖Δ
ͱ͍͏͜ͱ…ʁ
iOS 11 Ҏ߱ͷੈքͰ 1. AVCaptureSession ͰಡΈऔΔ ߴਫ਼Ͱ͍
iOS 11 Ҏ߱ͷੈքͰ AVMetadata Machine ReadableCode Object 2. CIQRCodeDescriptor #errorCorrectedPayload
ΛऔΓग़͢ 1. AVCaptureSession ͰಡΈऔΔ
iOS 11 Ҏ߱ͷੈքͰ AVMetadata Machine ReadableCode Object 2. CIQRCodeDescriptor #errorCorrectedPayload
ΛऔΓग़͢ σίʔυ͢Δ 1. AVFoundation ͰಡΈऔΔ ͕Μͬͯ 3.
ղܾ ͬͨʔʂʂࠓͦ͜
σίʔυ͢Δ ͕Μͬͯ 3. ͕Μͬͯ
͕ΜΔ = ࣗલͰσίʔυॲཧΛॻ͘
ࣗલσίʔυͷํ • શϞʔυʹରԠ͠Α͏ͱࢥͬͨΒʢͨͿΜʣ݁ߏେม… • ͱ͍͏͔σϯιʔެࣜΞϓϦରԠͯ͠ͳ͍ • ࠷ݶಡΈऔΓ͍ͨQRίʔυͷσίʔυॲཧͰଥڠ • ಠࣗΤϯίʔυ͞ΕͨQRίʔυσίʔυͰ͖Δ͠ɺ ෯͕͕Δʢͱ͔ॻ͍ͯΔ͏ͪʹσϯιʔ͕Ԍ্͠·ͨ͠ʣ
=> https://srad.jp/submission/78134/
σίʔυͷҰྫ https://github.com/ monoqlo/QRCodeReader
࣌ؒ͋Ε গ͚ͩ͠ DEMO
·ͱΊ
0. iOS 10 ͷαϙʔτΛΔʢҰ൪େࣄʣ
·ͱΊʢiOS 11 Ҏ߱ͷੈքʣ 1. AVCaptureSession ͰಡΈऔΔ AVMetadata Machine ReadableCode Object
2. CIQRCodeDescriptor #errorCorrectedPayload ΛऔΓग़͢ ͕Μͬͯσίʔυ͢Δ 3.
Appendix • Speaker Info @monoqlo • This Slide URL https://speakerdeck.com/monoqlo/iosdc-2018