CamScanner is the best PDF scanner for Android and other platforms such as iOS. It allows the scanning of PDFs, receipts, notes on a whiteboard, business cards, contracts, ID, and much more. It can enhance scans, extract text from images, and annotate them. 3D scanner app price: Free, with in-app purchases. Compatible with: iOS devices and Android.

You can use ML Kit to recognize and decode barcodes.

See the ML Kit quickstart sample on GitHub forexamples of this API in use.

Note: ML Kit iOS APIs only runon 64-bit devices. If you build your app with 32-bit support, check the device's architecture beforeusing this API.

Before you begin

1. Include the following ML Kit libraries in your Podfile:
2. After you install or update your project's Pods, open your Xcode project using its.xcworkspace. ML Kit is supported in Xcode version 11.3.1 or higher.

Input image guidelines

• For ML Kit to accurately read barcodes, input images must contain barcodes that are represented by sufficient pixel data.

  The specific pixel data requirements are dependent on both the type of barcode and the amount of data that's encoded in it, since many barcodes support a variable size payload. In general, the smallest meaningful unit of the barcode should be at least 2 pixels wide, and for 2-dimensional codes, 2 pixels tall.

  For example, EAN-13 barcodes are made up of bars and spaces that are 1, 2, 3, or 4 units wide, so an EAN-13 barcode image ideally has bars and spaces that are at least 2, 4, 6, and 8 pixels wide. Because an EAN-13 barcode is 95 units wide in total, the barcode should be at least 190 pixels wide.

  Denser formats, such as PDF417, need greater pixel dimensions for ML Kit to reliably read them. For example, a PDF417 code can have up to 34 17-unit wide 'words' in a single row, which would ideally be at least 1156 pixels wide.

• Poor image focus can impact scanning accuracy. If your app isn't getting acceptable results, ask the user to recapture the image.

• For typical applications, it's recommended to provide a higher resolution image, such as 1280x720 or 1920x1080, which makes barcodes scannable from a larger distance away from the camera.

  However, in applications where latency is critical, you can improve performance by capturing images at a lower resolution, but requiring that the barcode make up the majority of the input image. Also see Tips to improve real-time performance.

1. Configure the barcode scanner

If you know which barcode formats you expect to read, you can improve the speedof the barcode scanner by configuring it to only scan those formats.

For example, to scan only Aztec code and QR codes, build aBarcodeScannerOptions object as in thefollowing example:

Swift

The following formats are supported:

• code128
• code39
• code93
• codaBar
• dataMatrix
• EAN13
• EAN8
• ITF
• qrCode
• UPCA
• UPCE
• PDF417
• aztec

Objective-C

The following formats are supported:

• Code-128 (MLKBarcodeFormatCode128)
• Code-39 (MLKBarcodeFormatCode39)
• Code-93 (MLKBarcodeFormatCode93)
• Codabar (MLKBarcodeFormatCodaBar)
• Data Matrix (MLKBarcodeFormatDataMatrix)
• EAN-13 (MLKBarcodeFormatEAN13)
• EAN-8 (MLKBarcodeFormatEAN8)
• ITF (MLKBarcodeFormatITF)
• QR Code (MLKBarcodeFormatQRCode)
• UPC-A (MLKBarcodeFormatUPCA)
• UPC-E (MLKBarcodeFormatUPCE)
• PDF-417 (MLKBarcodeFormatPDF417)
• Aztec Code (MLKBarcodeFormatAztec)

Note: For a Data Matrix code to be recognized, the code must intersect thecenter point of the input image. Consequently, only one Data Matrix code can berecognized in an image.

2. Prepare the input image

To scan barcodes in an image, pass the image as a UIImage or aCMSampleBufferRef to the BarcodeScanner's process()

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or results(in:)method:

Create a VisionImage object using a UIImage or a CMSampleBuffer.

If you use a UIImage, follow these steps:

• Create a VisionImage object with the UIImage. Make sure to specify the correct .orientation.

If you use a CMSampleBuffer, follow these steps:

• Specify the orientation of the image data contained in the CMSampleBuffer.

  To get the image orientation:

• Create a VisionImage object using the CMSampleBuffer object and orientation:

3. Get an instance of BarcodeScanner

Get an instance of BarcodeScanner:

4. Process the image

Then, pass the image to the process() method:

5. Get information from barcodes

If the barcode scanning operation succeeds, the scanner returns an array ofBarcode objects. Each Barcode object represents abarcode that was detected in the image. For each barcode, you can get itsbounding coordinates in the input image, as well as the raw data encoded by thebarcode. Also, if the barcode scanner was able to determine the type of dataencoded by the barcode, you can get an object containing parsed data.

For example:

Tips to improve real-time performance

If you want to scan barcodes in a real-time application, follow these guidelines to achieve the best framerates:

• Don't capture input at the camera’s native resolution. On some devices, capturing input at the native resolution produces extremely large (10+ megapixels) images, which results in very poor latency with no benefit to accuracy. Instead, only request the size from the camera that's required for barcode scanning, which is usually no more than 2 megapixels.

  The named capture session presets—AVCaptureSessionPresetDefault, AVCaptureSessionPresetLow, AVCaptureSessionPresetMedium, and so on)—are not recommended, however, as they can map to unsuitable resolutions on some devices. Instead, use the specific presets such as AVCaptureSessionPreset1280x720.

  If scanning speed is important, you can further lower the image capture resolution. However, bear in mind the minimum barcode size requirements outlined above.

  If you are trying to recognize barcodes from a sequence of streaming video frames, the recognizer might produce different results from frame to frame. You should wait until you get a consecutive series of the same value to be confident you are returning a good result.

  The Checksum digit is not supported for ITF and CODE-39. Geographymr. macs class website.

• For processing video frames, use the results(in:) synchronous API of the detector. Call this method from the AVCaptureVideoDataOutputSampleBufferDelegate's captureOutput(_, didOutput:from:) function to synchronously get results from the given video frame. Keep AVCaptureVideoDataOutput's alwaysDiscardsLateVideoFrames as true to throttle calls to the detector. If a new video frame becomes available while the detector is running, it will be dropped.
• If you use the output of the detector to overlay graphics on the input image, first get the result from ML Kit, then render the image and overlay in a single step. By doing so, you render to the display surface only once for each processed input frame. See the previewOverlayView and MLKDetectionOverlayView classes in the showcase sample app for an example.

Next steps

See the ML Kit quickstart sample on GitHub forexamples of this API in use.

Reading Time: 5 minutes read

How to scan photos on an iPhone

When you thinkabout scanning documents, do you picture a bulky piece of equipment in thecorner gathering dust? Well, you might be surprised to learn that you can nowuse your iPhone to scan important documents or old photos, instead.

Using a photo scanner app, you can automatically remove glare and distortion from your images, leaving you with a high-quality image in the correct proportion. With apps offering helpful features such as automatic edge-detection, color restoration and cropping, digitizing your treasured photographs has never been simpler.

Whether you need to scan photographs, bank statements, or receipts, here are five of the best photo scanner apps for iPhone – with both free and paid options.

Free apps: the best photo scanner apps for iPhone

If you need to scan images infrequently or as a one-off, there are some great apps out there that won’t cost you a penny. Here are three of the best free photo scanning tools.

Cam Scanner

With Cam Scanner,you can crop and edit your scanned images, then convert them intoeasily-shareable PDFs or JPEGs. The app’s tagging option lets you easilyorganize your photos into topics, so you can find and share them hassle-free.What’s more, the app works with various third-party tools – such as OneDrive,Dropbox and Google Drive – so it’s easy to sync up with tools you’re alreadyusing.

While there’s apremium version of Cam Scanner, the free software offers enough functionalityto get high-quality, easy-to-share scans. It can be downloaded from the AppStore.

Best features:

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• Smart cropping andauto-enhancement of your images
• Add watermarks orannotations
• Create a passcode forviewing private documents

Google PhotoScan

Developed byGoogle, PhotoScan is available on both iOS and Android. Simply take threephotographs of your scanned item from different angles, then let PhotoScanautomatically combine them into a glare-free, digital image. While editingoptions are limited, being able to add your images directly to Google Photos isa helpful feature if you’re already using Google tools.

PhotoScan can bedownloaded from the App Store.

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Best features:

• Get glare-free scans inseconds
• Automatic cropping basedon edge detection
• Smart rotation ensuresyour photos are always the correct way up

Photomyne

Photomyne letsyou scan multiple photographs in a single shot. It auto-detects photoboundaries, then auto-rotates, crops and saves your scans to a digital albumthat’s easy to share with family and friends. What’s more, Photomyne provideshelpful tools to get the best out of your photos, such as colorizing black andwhite images or creating collages.

You can create anaccount to access restricted features, but the free version offers greatfunctionality for scanning images. Photomyne can be downloaded from the AppStore.

Best features:

• Scan multiple images ina single shot
• Apply photo filters andcolorize your images
• Create photo collages,slideshows and more

Paid apps: the best photo scanner apps for iPhone

If you scan items regularly and need the best functionality and editing tools, you might like to purchase a premium app. Here are two of the best paid-for photo scanning options.

Photo Scanner Plus

PhotoScanner Plus automatically detects picture boundaries and rotates your image tocreate an undistorted, high-quality scan. What’s more, Photo Scanner Plusauto-enhances your scanned photos – sharpening, contrasting and restoring colorto create digital images that are easy to share with friends and family.

PhotoScanner Plus requires a one-off payment of $5.99, but it does have limitations.If you want photo backup and online access with no constraints, you’ll need tosubscribe to a monthly or yearly plan. Photo Scanner Plus can be downloadedfrom the App Store.

Best features:

• Scanmultiple photographs in a single shot
• Apply photofilters and colorize your images
• Share scanned photographs easily on social media

Pic Scanner

Available on iOS only, Pic Scanner lets you scan multiple photos at the same time, making digitizing your images quick and simple. Within the app, you can rotate your photographs, enhance colors with filters and add detailed information about each image for your own reference.

While there’s a free version of Pic Scanner available, it limits you to just 12 images. However, at a cost of just $3.99, the full version lets you scan and share as often as you wish. Pic Scanner can be downloaded from the App Store.

Best features:

• Scanmultiple photographs in a single shot
• Photoediting tools and filters
• Unlimitedphoto editing, albums and slideshows

Create stunning gifts from your scanned photos and pictures

Now your favorite photographs are scanned to your phone, why not bring them to life with a personalized photo gift from Motif?

Create high-quality photocards, photobooks or calendars in minutes with our easy-to-use app. Whether it’s a book of childhood memories for Mother’s Day or a thoughtful card for a friend featuring scanned polaroids, create something unique and thoughtful with Motif. Download the app today.

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