Owners of smartphones of the brand Xiaomi and its sub-brand Redmi often do not even suspect that their device already has a powerful tool for digitizing documents built into it. You do not need to download dubious apps from the Internet or pay for a subscription to specialized services. The MIUI system, and now HyperOS, offers native solutions that work faster and more stable than most analogues.
Modern document scanner is not just a photograph of paper, but a complex image processing algorithm. It straightens perspective, removes shadows, increases text contrast, and allows for character recognition (OCR). On Redmi smartphones, this functionality is deeply integrated into the shell; it can be accessed through Explorer, the Camera application or the Security system menu. In this article, we will look at all the ways to turn your phone into a pocket office.
Why carry unnecessary gadgets with you if your phone does the job in seconds? Proper setup and knowledge of hidden functions will allow you to scan receipts, contracts, business cards and even translate signs in real time. We will consider both standard methods from the manufacturer and alternative options for complex cases when maximum quality or specific file export settings are required.
Built-in scanner through the Camera application and AI
The fastest way to scan a document on Redmi is to use artificial intelligence capabilities in the standard camera application. In the latest versions of the shell, this function is called Google Lens or simply “Documents” in AI mode. You don't need to look for a separate icon, just launch your usual shooting application.
Point the lens at a piece of paper. The system will automatically recognize the boundaries of the document and prompt you to press the shutter button or a special scanning icon. After taking the photo, the phone will prompt you to select a filter: “Color,” “Black and White,” or “Increase Contrast.” This is critical for the readability of small fonts in contracts or medical certificates.
Pay attention to the mode Documents in the shooting mode menu. It is specially optimized for working with text. Unlike a regular photo, here the camera takes a series of photos and selects the clearest one, automatically cropping off unnecessary edges of the table or background. This saves time on subsequent processing in editors.
⚠️ Attention: The scanning mode through the camera may not work correctly in low light conditions. Algorithms may mistake shadows for part of text or incorrectly detect paper boundaries. Always check the result before saving.
If you have global firmware installed, a service from Google may be activated instead of the native Xiaomi scanner. This is not bad, it's just that the interface will be different. The functionality will remain the same: text recognition, copying it to the clipboard and the ability to translate captions directly over the image in real time.
For better scanning quality through the camera, wipe the lens before shooting. Greasy finger stains create a “soap” effect, which sharpening algorithms cannot always correct.
Using the Scanner system application in Explorer
Many users ignore the built-in application Mi Scanner, which is often hidden in the depths of system utilities. On most Redmi models it is available through the File Manager application. Open it, go to the “Tools” category or find the scanner icon on the main screen of the folder.
This tool has more advanced settings compared to a regular camera. Here you can choose the file format to save immediately after shooting. Options are available PDF for multi-page documents and JPG for single images. The application also allows you to add multiple pages to one file, which is indispensable when scanning passports or multi-page contracts.
The QR code and barcode recognition function here is implemented at the highest level. You don't need to focus manually—pointing the camera at the code instantly reads the information and suggests an action: open a link, add a contact, or show a product in an online store. This is a universal processor for working with graphic information.
- 📄 Possibility of combining several photos into one PDF file.
- 🔍 Automatic improvement of text quality and background removal.
- 🌐 Support for text recognition (OCR) with subsequent copying.
- 📱 Quick access via a widget on the desktop or control panel.
The application interface is intuitive, but there is a nuance with access rights. When you first start, the system will ask for permission to use the camera and storage. Without granting these rights scanner it simply will not be able to save the finished file. Make sure that in the permission settings (Settings → Applications → Permissions) all items are active.
Setting quality and saving formats
The quality of the final document directly depends on selected compression and resolution settings. The Redmi scanner menu often defaults to a balance between file size and quality. However, for legally significant documents or archiving, it is important to set the maximum parameters.
Go to the scanner application settings (usually the gear icon in the corner). Find "Image Quality" or "Resolution". Switch it to High or Originalmode. This will increase the weight of the file, but will preserve the smallest details, such as stamps, signatures and microtext, which, with strong compression, turn into unreadable spots.
It is also important to choose the right color profile. For text documents without illustrations, B&W or Grayscale mode is best. This not only improves readability by removing the colored noise of the paper, but also significantly reduces the file size, which is convenient for sending by email or via instant messengers.
| Document type | Recommended mode | File format | Features |
|---|---|---|---|
| Text agreement | B/W (High contrast) | Minimum weight, clear text | |
| Photo with print | Color (Original) | JPG / PNG | Save print and background color |
| Business card | Color + Recognition | Contact (VCF) | Automatic creation of contact |
| Drawing or diagram | Shades of gray | Preserving thin lines |
Don't forget about page orientation. Although modern scanners can automatically detect rotation, sometimes they make mistakes, especially if the text is handwritten at an angle. Manually set the orientation Portrait (portrait) or Landscape (landscape) before a series of pictures so as not to redo the file later.
To send documents to government agencies, always use the PDF format with maximum compression quality to avoid distortion of important details.
Text recognition (OCR) and translation
One of the most useful features of the scanner on Redmi is technology OCR (Optical Character Recognition). It allows you to turn a picture with text into an editable format. This works not only with Russian, but also with English, Chinese and many others, depending on the installed language packs.
After scanning the document, click on the “Recognize text” button or the icon with the letter “T”. The system will highlight all found characters. You can copy all the text at once, select a specific paragraph, or even translate it. This function is indispensable for students taking notes on lectures from the blackboard, or tourists reading menus in foreign cafes.
Integration with Google services or Xiaomi’s own databases is used for translation. Point your camera at a foreign sign and the on-screen text will be replaced with real-time translation. The translation accuracy depends on the complexity of the font and background, but for standard printed texts it reaches 90-95%.
⚠️ Attention: Recognition of handwritten text works worse than printed text. Calligraphic handwriting or text written with strong pressure may be interpreted with errors. Always check the result with the original.
If you need to translate a large amount of text from paper, use the “Import from Gallery” mode. Take a high-quality photo, save it, and then open it through the scanner. This will give the algorithms more time to process the image than when shooting in real time, which will increase recognition accuracy.
The secret of accurate translation
Before using the translation function in the language settings, download offline packages for the desired language. This will speed up the work and allow you to use the function even without the Internet, although the quality may be slightly lower than with online processing.
Third-party applications: when standard functions are few
Despite the power of the built-in tools, sometimes situations arise that require specific functionality. For example, the need to remove watermarks, advanced work with cloud storage, or specific export settings to Excel. In such cases, third-party solutions from Google Play come to the rescue.
Applications like Adobe Scan, Microsoft Lens and CamScanner. They offer more flexible post-processing: manual corner correction, removal of glare from lamps (which is often a problem when scanning laminated documents) and integration with corporate ecosystems.
Installing a third-party scanner on Redmi requires attention to resolutions. Often such applications request access to the microphone or geolocation, which is redundant for the scanner. In the settings Applications → Permissions feel free to disable everything unnecessary, leaving only Camera and Storage. This will increase the security of your personal data.
- 🚀 Adobe Scan: Ideal for creating PDF with automatic recognition of form fields.
- ☁️ Microsoft Lens: Best integration with Word and OneNote, convenient for office work.
- ✂️ CamScanner: Powerful tools cropping and filters, but a lot of advertising in the free version.
Remember that using third-party software may consume more battery and RAM resources than the native MIUI solution. If you scan documents rarely, it is better to limit yourself to the built-in tools. If this is part of the daily work process, installing a specialized application is justified.
☑️ Check before installing a third-party scanner
Organizing storage and sending scanned files
Scanning is only half affairs. It is important to properly organize the storage of received files so that they can be quickly found. On Redmi, files are saved by default to the folder MIUI/Scanner or to the root directory DCIM. A chaotic accumulation of files will quickly lead to confusion.
It is recommended to rename files immediately after scanning using a clear pattern, for example: Date_DocumentType_Last Name.pdf. The built-in file manager allows you to do this in batches. It is also convenient to use tags or place files in special albums in the Gallery.
For automatic synchronization, set up a backup copy of the folder with scans to the cloud (Google Drive, Yandex.Disk or Mi Cloud). This will protect you from losing important documents if your smartphone breaks down. In the cloud service settings, enable the “Upload only over Wi-Fi” option so as not to waste mobile traffic.
⚠️ Attention: Application interfaces and menu locations may vary depending on the version of MIUI (12, 13, 14) or HyperOS. If you do not find the described function, use the search in your phone settings by entering the name of the function.
When sending documents via instant messengers (WhatsApp, Telegram), always select the “Send as file” or “Document” option, not “Photo”. Sending as a photo activates additional compression by the messenger servers, which can make the text unreadable, especially small font.
Regularly clearing the folder with scans from drafts and unsuccessful attempts will help save space in your phone memory and speed up the search for the necessary documents.
Frequently asked questions (FAQ)
Why does the scanner on Redmi not see the borders of the document?
This often happens when the contrast between the sheet of paper and the table surface is low. Try placing a dark-colored sheet of paper underneath your document, or use manual cropping mode after shooting. Also make sure that the lighting is uniform and there are no sharp shadows.
Is it possible to scan documents without the Internet?
Yes, the basic function of scanning and saving to PDF/JPG works completely offline. However, text recognition (OCR) and translation functions require a network connection, since data processing occurs on servers.
Where can I find scanned files in the phone memory?
Usually they are located in a folder Internal memory → MIUI → Scanner. You can also access them through the “Gallery” application in the “Scanner” album or through “Explorer” in the “Documents” category.
How to scan a multi-page document into one file?
In the application “Scanner” after the first photo, do not close the window, but click the “Add page” button (the “+” icon). Take pictures of all other pages, and only then click “Save”. The system will collect them into a single PDF.
Is it safe to store a passport in your phone?
Storing scans of documents in a shared gallery is not safe. It is recommended to use a secure folder (Second Space or a hidden folder in the Gallery), access to which is protected by a password or fingerprint, or encrypted archives.