Usage: java -jar BlindWatermark.jar <commands>
    commands:
        encode <option> <original image> <watermark> <embedded image>
        decode <option> <original image> <embedded image>
    encode options:
        -c discrete cosine transform
        -f discrete fourier transform (Deprecated)
        -i image watermark
        -t text  watermark
    decode options:
        -c discrete cosine transform
        -f discrete fourier transform (Deprecated)
    example:
        encode -ct input.png watermark output.png
        decode -c  input.png output.png

gradle build

原图:

加文字水印:
java -jar BlindWatermark.jar encode -ct gakki-src.png 测试test gakki-dct-text-ec.jpg

文字水印解码:
java -jar BlindWatermark.jar decode -c gakki-dct-text-ec.jpg gakki-dct-text-dc.jpg

加图片水印:
java -jar BlindWatermark.jar encode -ci gakki-src.png watermark.png gakki-dct-img-ec.jpg

图片水印解码:
java -jar BlindWatermark.jar decode -c gakki-dct-img-ec.jpg gakki-dct-img-dc.jpg