Quantization Index Modulation (QIM) Digital WatermarkingB. Chen & G. W. Wornell (IEEE IT, 2001)
Quantization Index Modulation Watermarking
Information embedding through side information and disjoint quantizer ensembles. Unlike spread spectrum methods, QIM eliminates host signal interference entirely, enabling blind decoding without access to the original host image.
RMS Distortion: 0.30
OriginalWatermarked
Embedding Parameters
7 chars (56 bits)
36
4 (subtle)128 (robust)
1.00
0.10 (high retention)1.00 (pure DM)
Channel Distortion Simulator
No channel distortions applied. Image is transmitted across an ideal channel.
Blind Decoder Output
Watermark Decoded (100% Match)
Embedded Text
QIM2001
Decoded Text
QIM2001
Bit Error Rate (BER)0.0%
Bit Errors0 / 56
Extraction ReferenceStrictly Blind (No Host Image)