Detect Watermark

What is Watermark Detection?

Watermark detection (decoding) is a technology that reads invisible information embedded in an image. truvis's decode feature uses Adobe TrustMark technology to check for the presence and content of embedded payloads in images.

Understanding Detection Results

• "Watermark Detected" — A payload was successfully extracted from the image. The displayed payload is the embedded string.
• "No Watermark Detected" — Either no watermark was embedded in the image, or the watermark may have been corrupted by image processing.
• Detection accuracy depends on how the image has been processed. Significant cropping or extreme compression may make detection difficult.

How Watermark Detection Works

truvis's decode feature uses Adobe TrustMark's decoder network to extract watermark information from images. The decoder analyzes subtle patterns embedded in the image's pixel data during encoding and reconstructs the original payload (watermark text). This processing is performed server-side, where the neural network reads the overall features of the image, enabling high-accuracy information recovery even after image processing such as compression and resizing. The detection results display the presence of a watermark and the extracted payload.

Use Cases for Watermark Detection

How to Use (3 Steps)

1. Step 1: Upload an image — Drag and drop or select the image file (PNG, JPEG, or WEBP format) you want to check.
2. Step 2: Run decode — Click the "Decode" button to start the image analysis on the server.
3. Step 3: Review results — If a watermark is detected, "Watermark Detected" is displayed along with the embedded payload. If none is found, "No Watermark Detected" is displayed.

Factors Affecting Detection Accuracy

TrustMark technology offers high robustness, but the following factors may affect detection accuracy.

• Compression rate — Setting JPEG quality extremely low (e.g., quality 20 or below) increases the likelihood of watermark information being lost.
• Cropping — If a large portion of the image is cropped, there may be insufficient pixel data to retain the watermark information, making detection difficult.
• Resizing — Significant size reduction (e.g., below 25% of the original size) can affect detection accuracy.
• Screenshots — Detection is possible even from screenshots, but accuracy may vary depending on display resolution and capture conditions.

Frequently Asked Questions

Can it detect watermarks embedded by other tools?

truvis's decode feature only supports Adobe TrustMark format watermarks. Watermarks embedded using other digital watermarking methods (such as LSB embedding or DCT embedding) cannot be detected.

Does the detection process modify the image?

No, the decode process only reads the image and makes no changes to the original. You can use it with confidence.

It says "No Watermark Detected" but I embedded one.

If the image has undergone significant processing after upload (extreme compression, cropping, filter application, etc.), the watermark may have been corrupted and become undetectable. If possible, try again with the image before processing or with a less processed version.

Can detection results be used as legal evidence?

truvis's detection results can be used as reference information for confirming the presence of watermarks. For use as legal evidence, please consult a specialist. Combined with other evidence as part of digital forensics, it can provide stronger proof.