Xiaomi smartphones have long proven to be powerful tools for entertainment, but also for productive work. One of the common challenges that users face is the need to quickly copy a passport, certificate or contract in digital form. The camera in Redmi and Xiaomi devices has enough resolution and processing algorithms to make this process simple and efficient.
However, simply pressing the shutter button is not enough. Often the images are blurred, skewed or contain glare that interfere with reading text. In this article, we will discuss how to set up the camera, use built-in scanning functions and achieve professional quality of the images without using third-party equipment.
Modern MIUI and HyperOS shells offer advanced scanning modes that many people don't even know about, and understanding these nuances will save you time and get perfect copies of documents right in your pocket. We'll look at both standard tools and specialized applications from the developer.
Preparing the camera and settings before shooting
Before you start taking direct photos, make sure your camera is ready to work in macro or scan mode. Standard Photo mode often uses aggressive noise cancellation, which can eat small letters. First, open the Camera app and check the lens for contamination, as even a microscopic fingerprint will turn the text into an unreadable stain.
An important parameter is aspect ratio and resolution. For documents, optimally use the maximum available resolution to keep fonts clear. In the camera settings, find Photo Size and select a value such as 12 MP or higher if your smartphone model allows. Do not use digital zoom, as it reduces image quality.
Focus is a special focus. Automatics doesn't always understand that you're shooting flat text, and can focus on the texture of the paper or the background. Tap the screen in the text area to force the focus. If the camera has manual mode (Pro), you can try to increase the sharpness, but for most users, it's enough to lock the focus in a timely manner.
Image stabilization also plays a role, especially in low light. Make sure the stabilization function is active in settings. When shooting, try to keep the phone parallel to the surface of the document to avoid geometric distortions, which then have to be corrected programmatically.
Use of the built-in Documents mode in MIUI
What Xiaomi smartphone owners often don't know is that the standard camera app already has a powerful text-handling tool called Documents, which automatically aligns perspective, removes shadows, and increases text contrast, and you can find this mode by swiping right in the camera interface to the "More" tab and selecting the appropriate icon.
When you point the camera at a piece of paper in this mode, the system automatically defines the boundaries of the document, and you have a frame that shows you how the final image will be cropped, and you don't have to manually frame the photo in the gallery, and the system will turn the picture around, even if you were holding the phone at an angle.
⚠️ Attention: The “Do the Cougar” mode may not work properly with color documents with complex backgrounds or protective watermarks, sometimes trying to make the background white. Once the frame has captured the document, you can take a picture. The camera will instantly apply enhancement filters, making the text blacker and the background white. This is especially useful for scanning checks, invoices and handwritten notes, where readability is important, not artistic value. 📊 What camera mode do you use most often?Standard "Photo"Documents"Third-party applications Do not photograph documents Mi Doc Scan application and its capabilities For more advanced work with documents, Xiaomi has developed a separate application, which is often preinstalled in the system or available in the GetApps store. It's called Mi Doc Scan, or "Document Scanner," and it's designed to create digital copies and recognize text (OCR). The main advantage of Mi Doc Scan over a regular camera is the ability to create multi-page PDF-You can shoot multiple pages of a contract in a row, and the app will combine them into one file, and you can also use more subtle filtering settings, such as Black and White, Grey or Original, which is critical for documents with photos. Text recognition allows you to convert an image into editable text, and although support for Russian may vary depending on the version of the shell, basic printed texts are recognized fairly well. This is convenient if you need to copy the details or address without manual reprinting. ☑️ Checklist of quality scan Clean camera lens Choose uniform lighting Align document on the surface Use tripod or hand rest: 0 / 4 Shooting Techniques: Lighting and Removing Glare The biggest problem when photographing documents on glossy paper or laminated cards is the glare from a flash or lamps. The smartphone's built-in flash creates a hard light that bounces directly into the lens, making some of the text invisible. Professionals never use a direct flash to scan. To get the perfect result, you need diffuse light. The best option is daylight by the window, but without direct sunlight. If you're shooting with artificial light, place the light source on the side of the document, and hold the phone so that the body does not block the light. Sometimes it helps to use a second smartphone with a flashlight on, the light of which is directed at the wall next to the document, creating a soft reflected light.The angle of the camera also matters. If the top of the picture is further away from the lens than the bottom, there will be a trapezoid effect, and some of the text may fall out of focus. Use the grid on the camera screen to align horizontal lines. 💡Use the "Night" mode or «HDR» In poor lighting, but make sure that the text doesn't become too contrasting and lose font detail. Even after a good shot, the image may need to be reworked. The built-in editor at Xiaomi Gallery offers tools that can save the day. Open the photo, click Change and find tools to work with color and light. Increasing the contrast and clarity (or sharpness) settings often makes text more legible. Use the frame and turn tool to fix geometry. Some versions of MIUI have a straighten up feature that automatically removes the blockages of the horizon. If a document was photographed at an angle, try finding the Document filter in the effects section - it will forcefully whiten the background and darken the letters. If the built-in tools are not enough, you can use third-party applications like Google Photos or specialized scanners, but often enough and the filtering algorithm does not automatically show the best result from the legal paperwork. Below is a table comparing the main methods of obtaining digital copies on Xiaomi. Text Quality Method Speed Convenience Mode Documents High Instantly Very handy Mi Doc Scan App Maximum Average Functionally Normal Photo + Editor Depends on Skills Low Requires Time Third-Party Scanners High Average Needs to Install Frequent Errors and How to Avoid Thems One of the common mistakes is shooting on weight. Trembling hands lead to lubrication, which is especially noticeable in small print. Always look for the support: Skills Low Demanding the Skills, Third-Time Scanner, requires time to installing the document, which is not to be placed on the background, and the document, if the necessary to determine the background. Use a monochromatic background or put a blank sheet of paper under the document, which will help artificial intelligence algorithms better distinguish the subject. ⚠️ Warning: Never send photos of documents in instant messengers without compression if high quality is required. Use the File or Document feature on Telegram and WhatsApp to save the original resolution. Remember to check the result immediately after shooting. zoom in and read the smallest lines. If the text floats or the letters merge, it's better to reshoot the frame immediately than to detect a marriage at home when the opportunity to take a new picture disappears. Some users put the document on a glass table or press it with a glass frame so that it lies perfectly flat and does not bend. FAQ: Frequently Asked Questions: Can you recognize text from a photo on Xiaomi without the Internet? Yes, some Xiaomi smartphones support offline text recognition through built-in features AI, But for better accuracy and Russian, the Mi Doc Scan application might require an initial load of the language pack, and then the Internet would be no longer needed. Why does the camera focus on the background rather than the document? This happens if the distance to the document is too small for the lens you choose, push the phone a little further and use digital zoom, or tap the screen in macro mode to force you to shift focus to close objects. Which format is best to save: JPG or PDF? For photos and color documents with images is better suited JPG, Because it takes up less space. For multi-page text documents, contracts and reports, the format is preferred PDF, It's more convenient to send and type. Is it safe to store scans of documents in a gallery? It's not safe to store scans in a public gallery if the phone falls into the wrong hands. It is recommended to use a hidden folder in the gallery (the Hidden Album feature), or move such files to password-protected repositories such as Second Space or third-party ransomware. 💡Using a specialized Documents mode or Mi Doc Scan app gives a significantly better result than a regular photo, thanks to automatic alignment and improved text contrast.