How to set up a scanner on a Xiaomi phone: the full guide

Xiaomi’s modern smartphones have long since ceased to be just communication devices, becoming powerful pocket offices capable of performing tasks that used to require bulky technology. One of the most sought-after features for students, office workers and entrepreneurs has been the ability to quickly digitize paper documents directly through the camera. Device owners often do not even realize that their phone already has a professional scanning tool built in, without requiring the installation of additional software.

Built-in image processing algorithms in the MIUI shell or the new HyperOS allow for automatic perspective alignment, shadow removal and text readability, making the process of creating digital copies of passports, contracts or notes quick and efficient, but many users face difficulties in first running, not knowing where to find the right option or how to activate automatic text recognition.

In this article, we will take a closer look at all the ways you can activate and fine-tune your scanner on your device, learn how to turn your camera into a powerful document tool, learn how to use hidden features, and avoid common errors that reduce the quality of the images you receive.

Built-in Scanning in MIUI and HyperOS

Starting with certain firmware versions, Xiaomi engineers have implemented a separate system application that works independently of the main camera, which is specifically optimized to work with text and graphic elements, ignoring the unnecessary details typical of ordinary photography, and can be found through a search system or in the Tools folder on the desktop.

When you first run the app, you'll ask permission to access the camera and the gallery, which is a critical step, without which you'll be limited. Once you get the permissions, you'll see a multi-mode interface that swipes or clicks on the icons at the bottom of the screen, and there's no need to set up exposure or focus, because all the processes are automated.

The main feature of this tool is the ability to instantly translate text or recognize it (OCR) The algorithms work locally on the device, which guarantees the confidentiality of data. To activate the document mode, you just point the camera at the sheet, and the system will highlight the boundaries.

• 📄 Documents mode – automatically determines the edges of the sheet, removes distortions of perspective and makes the background white.
• 🔍 Text mode – designed for character recognition with the ability to copy or translate.
• 🏞️ Image mode – used to scan photos or objects where it is important to save colors.
• 🌐 Translation Mode – overlays translation over the original text in real time.

⚠️ Note: In some global firmware versions, the application may be called “Mi Scanner” or be integrated directly into the negative screen widget (swipe to the right).

The quality settings in this app are minimal, because the developers have been betting on artificial intelligence. However, you can manually choose the resolution of the saved file in the application settings if you don't like the standard one. There are usually options from 720p to 4K, but for documents, excessive resolution will only increase the weight of the file without any apparent benefit.

Use of the scanner widget in the Camera app

For those who prefer not to look for extra icons, Xiaomi has built-in scanning module right in the standard Camera app. This is the fastest way to access the feature, especially if you need to scan. QR-To activate this mode, you just open the camera and swipe right or click on the "More" button in the bottom menu.

Unlike a single application, the scanner works as a filter, processing algorithms are activated at the time of shooting, allowing you to immediately see the result on the screen, which is convenient when you need to make several copies in a row and immediately assess their readability, the system will offer to save the file in PDF or image format.

It is important to note that in camera mode, additional settings are available, such as timer and aspect ratio. 4:3 format is best for scanning documents, since it is as close to the proportions of the A4 sheet as possible. Using a wide-format 16:9 mode can lead to a cropping of the edges of the document.

If you use this feature often, it makes sense to add a scanner shortcut to your desktop or widget menu, and in the HyperOS shell, you can bring a separate button scan mode to the camera control interface, which greatly speeds up access.

• 🚀 Quick access via swipe in the camera interface.
• 🎨 Possibility of using filters (black and white, reinforced) before saving.
• 📑 Automatic creation of multi-page PDF-file-shot.
• ⚡ Instant sync with the cloud Xiaomi Cloud or Google Drive.

The quality of the images is directly dependent on the lighting. The built-in flash often gives a glare on glossy paper, so for important documents, it is better to use natural light or a desk lamp pointed at the side. The camera's automation will try to compensate for the shadows, but physical light is always more effective than software processing.

Google Lens Configurement as an Alternative

All Xiaomi certified smartphones with Google services are pre-installed with a powerful recognition tool, Google Lens, which is often more advanced in terms of text and translation than standard tools of the manufacturer. Integration takes place at the system level, allowing you to call the scanner directly from the search bar or the camera widget.

The main advantage of this method is cloud processing. Google neural networks are constantly trained on millions of examples, which ensures the highest accuracy of recognition of even handwritten text or complex typography.

In Google Lens, you can choose a recognition language, which is critical for working with documents in different languages, so you can save text directly to the clipboard or send it to Google Docs, Keep or Translate, which creates a convenient workflow for students and translators.

💡

For better handwriting recognition in Google Lens, try to write legibly and use a dark pen on white paper without cells.

Google Lens' Home Page allows you to scan objects and find similar products or information about them. While this is more about shopping, it's an indispensable tool for scanning checks or labels with specifications of machinery. You can instantly find instructions for a device by simply scanning a sticker on its case.

• 🌍 Real-time translation support for more than 100 languages.
• ✏️ High accuracy of handwriting recognition.
• 🔗 Smart extraction of contact data, links and Wi-Fi passwords.
• ☁️ Full integration with Google’s ecosystem of services.

It is worth considering that some features of Google Lens require an active Internet connection. If you are in a bad reception zone, basic document scanning may work slower or require preloading language packs for offline mode.

Manually adjusting camera parameters for scanning

If the automatic modes don't work, you can try to set up the main camera manually. In professional mode (Pro), you can set up ISO, shutter speed and focal length. To scan documents, you need to fix the focus and reduce the noise of the matrix.

Set the ISO value to a minimum (usually 50 or 100) so that the image is as clean as possible, without grain. Shutter speed (S) is better left automatic or selected so that the picture is not blurred. Focus (MF) should be transferred to manual mode and set to infinity or macro, depending on the distance to the document.

The resolution of the image also plays a role. In the camera settings, select the maximum value available, such as 50 MP or 64 MP, if your sensor supports this, this will allow you to keep the sharpness of small letters in the subsequent framing. However, remember that such files take up a lot of space.

⚠️ Attention: Using digital zoom is strongly discouraged in scanning, resulting in loss of detail and blurring of text.

To align the horizon in the frame, you can turn on the grid in the camera settings (3x3), which will help to position the phone parallel to the plane of the document, avoiding trapezoidal distortions, which then have to be adjusted programmatically.

Use of third-party apps from Google Play

When built-in tools are scarce, specialized applications come to the rescue, with Adobe Scan, Microsoft Lens and CamScanner leading the market, offering advanced features such as batch scanning, automatic page numbering, and enterprise cloud integration.

Microsoft Lens is ideal for office workers because it can save documents in Word or PowerPoint formats, while keeping text formatting. Adobe Scan is famous for its background cleaning algorithm, making text contrast and clear even on bad paper.

When installing these applications, pay attention to the permissions requested. Access to the file system and camera is mandatory, but suspicious requests for access to contacts or location are better blocked if they are not necessary for the scanner functionality.

Most of these apps have free versions with limited functionality and paid subscriptions, and basic features are enough for one-time use, and it is important to update the apps regularly to get new algorithms for improving images.

Optimizing and Resolving Scanning Problems

Even with the right setup, there can be problems, such as blurring, misdefining boundaries, or recognition errors. Often the cause is foul optics. Rub the camera with a soft cloth before every important scan, as greasy finger marks create a soapy image.

If the scanner can't see the edge of the document, try changing the background. Put the document on a contrasting color surface. For example, a white sheet is better scanned on a dark table, and a dark cover is scanned on a light background. This will help computer vision algorithms clearly separate the object from the surroundings.