Digital Watermark Detection Across Visual Media Format Conversion
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Solution Overview
Problem
Existing digital watermarking techniques struggle to detect watermarks in visual media after format conversion, such as from image to PDF or video to analog, as the format change makes comparison difficult.
Innovation Solution
The method involves identifying unused colors in the visual media, placing a watermark using these colors, and verifying the watermark through image processing, even after format changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an image is converted to a different format (e.g., to PDF or compressed/uncompressed), then the format adaptability is improved, but the watermark detectability deteriorates
Solution Approach 1:
The patent embeds watermarks using unique colors that are identified as not present in the original visual media. This color-based approach allows the watermark to remain detectable even when the media format changes (e.g., image to PDF, video to analog), as the unique color signature persists through format conversions that would otherwise make traditional watermark detection difficult.
2Reliability
If existing watermark techniques are used, then the watermark can be detected in original format, but the technique fails when media is printed or converted to analog and back
Solution Approach 1:
By embedding watermarks in unique colors that differ from all colors in the original media, the system creates a detectable signature that survives format conversions and analog-digital cycles. The verification process identifies these unique colors to confirm watermark presence, maintaining reliability across different media formats and conversion processes.
Data Source
AI summary
A visual media is received. For example, the received visual media may be a digital image, a video file, or a video stream. A plurality of colors in the visual media are identified. In response to identifying the plurality of colors in the visual media, one or more colors not in the visual media are identified. A watermark is placed in the visual media to produce a watermarked visual media. The watermark comprises at least one of the identified colors not in the visual media. The watermarked visual media is verified using image processing.