Brushed-out parts of photographs are a common practice to hide confidential information: document numbers, people's faces, addresses or financial data. But what should you do if you necessary recover this information - for example, to recover lost data, analyze the authenticity of a photo or professional work? On Android smartphones there are several ways to partially or completely reveal the shaded areas, but it is important to understand their limitations and legal risks.

In this article we will examine legal methods (for your own photos or with the owner’s permission), the technical nuances of working with graphic editors, as well as modern AI tools that can help recovery. Let us note right away: There is no 100% guarantee —it all depends on the method of painting, image resolution and tools used. If the blurring is done professionally (for example, using vectorization or multi-layer editing), the chances are minimal.

Before you start, make sure you have the right to access this data. Unauthorized recovery of someone else's hidden information may violate laws about personal data (for example, FZ-152 in Russia) or copyrights. All examples in the article are given for educational purposes and work with own materials.

📊 Why do you need to reveal what is covered up on photo?
Recovering your data
Verifying the authenticity of a document
Professional activity (journalism, analytics)
Curiosity
Other

1. Analysis of the painting method: what can be restored?

The effectiveness of restoration depends on whether how exactly the image was hidden. Let's look at the main covering techniques and their vulnerabilities:

  • 🖌️ Manual painting (with a brush in Photoshop, Paint): the most vulnerable method. Often leaves artifacts of the original image in the pixels, especially if the blur is done on top of a layer without merging.
  • 🔲 Black rectangle (pasted on top): if added as a separate layer, it can be removed in editors that support layers (for example PicsArt or Photoshop Express).
  • 🔍 Blur: partially recoverable using sharpening tools, but the quality will be low.
  • 📊 Vectorization or pixelation: practically unrecoverable without the original file.
  • 🔒 Protected formats (for example, .pdf with editing prohibited): require preliminary extraction of the image.

The easiest way to work with files is in the formats .png or .tiff —they save layers and metadata. .jpg compresses the image, which complicates recovery. Before you begin, check the file properties:

⚠️ Attention: If the photo was processed in online services (for example, Canva or Fotor), the original data could be irretrievably lost during export. In such cases, even professional tools. are powerless.

For quick analysis, use the application Photo EXIF Editor (available in Google Play). It will show what changes were made to the file: 

Install the application → Open the photo → Check the sections "Software" and "History"

2. Method 1: Editors with support for layers (for surface painting)

If the shading is done over the original image (for example, with a black rectangle or a brush), it can be removed in editors that support working with layers:

  • 📱 Photoshop Express (free, with basic layer tools).
  • 🎨 PicsArt (paid version allows you to work with masks).
  • 🖼️ Lightroom Mobile (for adjusting contrast and brightness).

Step-by-step guide for PicsArt:

  1. Open the photo in the application and select tool "Layers".
  2. If the blur is on a separate layer, just delete it.
  3. If there are no layers, try the tool "Recovery" (Clone Tool) for retouching.
  4. Export the result to .pngto maintain transparency.

Make a backup copy of the original file

Check the format (preferably .png)

Increase screen brightness for better control

Use a stylus (if available) for precise work-->

For difficult cases (for example, when the smudging is done with a brush with low opacity), a combination of tools will help:

  1. Duplicate the layer with the smeared fragment.
  2. Apply filter "Increase sharpening" (Sharpen).
  3. Use "Tone correction" (Levels) to increase contrast.
⚠️ Attention: With aggressive sharpening, false artifacts may appear that will distort the original information. Always compare the result with unblurred areas of the photo.

3. Method 2: AI restoration tools (Remini, VanceAI)

Artificial intelligence can partially restore smeared fragments by analyzing surrounding pixels and “figuring out” the missing details. The following tools are available on Android:

ApplicationRecovery typeLimitationsCost
ReminiIncreasing resolution, restoring facesDoes not work with vectorized areasFree (with watermarks)
VanceAIIncreasing clarity, removing noiseRequires an Internet connectionFrom $4.95/month
Adobe Photoshop FixRetouching and restoration of fragmentsComplicated interface for beginnersFree (with Creative Cloud subscription)
SnapseedLocal brightness/contrast correctionDoes not restore textFree

How to use Remini to restore:

  1. Upload the photo to the application and select option "Improve".
  2. Crop the image so that the blurred area occupies most of the frame.
  3. Wait for processing (can take up to 30 seconds).
  4. Compare the result with the original - AI could “invent” non-existent ones details!

For text it is better VanceAI with the mode "Text Enhancement". An example of a command for processing through their web version: 

1. Go to https://vanceai.com/

2. "AI Image Enlarger"


3. Select 2x or 4x scale


4. Download the result and check it in Google Lens for text recognition

💡

If AI has restored the text, but it is blurry, try copying it through Google Keep with the OCR (text recognition) function. To do this, open the photo in Keep and click "Copy text."

4. Method 3: Working with the histogram and color channels

This method is suitable for photos where the blurring is done with a black brush with low opacity. (RGB, CMYK) to highlight hidden pixels.

Instructions for Photoshop Express:

  1. Open the photo and go to "Correction" → "Curves".
  2. Select channel "Blue" (Blue) - it most often retains residual information.
  3. Move the right side of the curve up to increase the contrast.
  4. Export the result and check in another editor.

For advanced users: if you have access to a PC, use GIMP (a free analogue of Photoshop) with the plugin Resynthesizer. It allows you to restore fragments based on the surrounding pixels. The command for installing the plugin on Linux/Android (via Termux): 

pkg install gimp

gimp -i -b "(plug-in-resynthesizer-register)"

⚠️ Attention: Changing the histogram can lead to loss of color balance throughout the image. Always work with a copy of the file and use masks for local edits.

5. Method 4: Analysis of metadata and editing history

If the photo was edited in professional apps (for example, Photoshop or Lightroom), traces of the original image may remain in its metadata. To extract them:

  • 📌 Use ExifTool (via Termux on Android):
    • pkg install exiftool

    exiftool -a -u -g1 your_photo.jpg

  • 🔍 Check tags XMP or IPTC —they can contain thumbnails of the original.
  • 🖥️ For .psdfiles use PSD Viewer (available in Play Market).

Critical: If a photo was saved after editing, the metadata of the original is almost always lost. In such cases, only analyzing the pixel structure will help (see the next section). .jpg after editing, the original's metadata is almost always lost. In such cases, only analysis of the pixel structure will help (see the next section).

To extract thumbnails from .thumbs or the gallery cache Android:

  1. Connect your phone to the PC and turn on "Developer mode" (click on the build number 7 times in Settings → About phone).
  2. Use ADB to access the folder /data/data/com.android.gallery3d/cache/:
    3. adb pull /data/data/com.android.gallery3d/cache/
What to do if the metadata is empty?

If the exif data is cleared, try to analyze the photo via FotoForensics (https://fotoforensics.com/). compression artifacts. For example, the area covered with a brush will have a different noise level compared to the original background. Please note: the service is paid for detailed analysis, but the free version will show the main inconsistencies.

6. Method 5: Restoration through magnification and filters

For text or small details (for example, serial numbers), a combination of magnification and specialized filters will help. Procedure:

  1. Increase the fragment by 400–800% in any editor (for example, Snapseed).
  2. Apply a filter "Increase sharpness" (Unsharp Mask) with a radius of 1.5–2.0.
  3. Use the tool "Clone" to remove noise.
  4. For text: convert the result to black and white mode (Gradient map to Photoshop Express).

Example of document number processing:

  1. Crop the area with numbers.
  2. Apply "Auto Contrast".
  3. Use Google Lens for text recognition.

If the numbers are still unreadable, try invert colors (Color → Inversion v PicsArt). This often helps when blurring with black on a light background.

⚠️ Attention: With an increase of more than 1000% .jpg-images begin to disintegrate into colored blocks (compression artifacts). This makes recovery impossible. permission.

7. Method 6: Specialized services (for professionals)

For complex cases (for example, restoration of persons or documents) there are paid services with manual processing:

  • 🔍 Forensic Image Analysis (from $50 per photo) - used in judicial examination.
  • 🖥️ Amped FIVE (software for law enforcement agencies).
  • 📊 ImageJ (free scientific tool with plugins for pixel analysis).

To work with ImageJ on Android:

  1. Install Termux and do:
    2. pkg install openjdk-17

    wget https://imagej.nih.gov/ij/download.html -O imagej.zip
    

    unzip imagej.zip
    

    cd ImageJ/
    

    ./ImageJ-linux64

  2. Use the plugin "FFT" to analyze the frequency spectrum of the image.

Important: These methods require deep knowledge in image processing. Incorrect use can lead to complete data loss or distortion of information.

💡

Most of the “magic” photo recovery applications in the Play Market are scams. They either show ads or simply increase the contrast without real analysis. Before installing, check the developer’s reviews and ratings.

8. ethics

Restoring smeared information without the consent of the owner can have serious consequences:

  • 📜 Breach of confidentiality (Article 137 of the Criminal Code of the Russian Federation - up to 2 years in prison).
  • 💳 Fraudif the data is used to access finance (Art. 159.6 of the Criminal Code of the Russian Federation).
  • 🖼️ Copyright violation (Article 1270 of the Civil Code of the Russian Federation).

Legal cases of use:

  • ✅ Restoration own documents (for example, a damaged passport).
  • ✅ Photo authenticity analysis for legal proceedings (with court approval).
  • ✅ Professional activity (journalism, criminology) with the consent of interested parties.

If you find someone else's photo on the Internet and want to reveal the blurred one "out of interest" - remember that this may qualify as unauthorized access to information (Article 272 of the Criminal Code of the Russian Federation).

⚠️ Attention: Even if you have recovered the information "for yourself", its distribution or use may be considered a crime. Always consult a lawyer before acting with someone else's data.

FAQ: Frequently asked questions

Is it possible to restore text blurred in a PDF document?

In most cases, no. Text in PDF is often vectorized or replaced with a black rectangle at the rendering level. Try:

  1. Copy text before/after the blurred fragment.
  2. Use OCR tools (Adobe Scan) to analyze surrounding characters.
  3. Check the source file (for example, .docxfrom which the PDF was made).

If the PDF is protected from editing, use PDF Element to remove protection (legal only for your own files!).

Will neural networks like MidJourney help restore the smeared data?

No, generative neural networks (for example, MidJourney, Stable Diffusion) do not restore the original data. generate new pixels based on a training sample, which leads to distortion of information. For example, instead of a real passport number, you will receive a random combination of numbers.

Such tools are also not suitable for analyzing the authenticity of a photo - they cannot distinguish the original from a fake.

How to protect your photos from recovery?

If you need to reliably hide information:

  • Use vector editors (Inkscape, Illustrator) for painting.
  • Export to .jpg with quality below 70% - this will destroy traces of the original pixels.
  • Apply blur to separate layer and merge before saving.
  • For text: replace the characters with similar ones from another font (for example, Cyrillic "a" with Latin "a").

Check the result through FotoForensics —if the service does not find artifacts, your blurring is reliable.

What to do if the blurred photo is a screenshot?

Screenshots often contain compression artifacts that complicate recovery. Try:

  1. Find original source (for example, the web page where the screenshot was taken).
  2. Use Wayback Machine (https://archive.org), if this is a page on the Internet.
  3. Analyze the browser cache (folder /data/data/com.android.chrome/cache/).

For screenshots from instant messengers (for example Telegram or WhatsApp) check the folder /storage/emulated/0/Telegram/Telegram Images/ —sometimes the originals are saved there.

Is it possible to restore a photo blurred in online editors (Canva, Fotor)?

B 90% of cases - no. Online editors:

  • Merge layers when exporting.
  • Use destructive editing (changes are saved directly in pixels).
  • Use compression, which destroys traces of the original data.

Exception: if you saved the project in the editor itself (for example, in Canva), you can return the original layers through the web version.