a jpg pic can't see watermark

Question

a jpg pic can't see watermark

idonkeyliu opened this issue 8 years ago · 7 comments

idonkeyliu commented 8 years ago

after decode, Jpg can't see watermark. The pic is a vertical pic.

Answer 1 · 2017-03-21T03:00:34.000Z

Jpg format is lossy compression , you'd better use some lossless compression formats like bmp, png, gif.

Answer 2 · 2017-03-21T03:05:28.000Z

OK, thank. I'll have a try.

Answer 3 · 2017-06-15T10:37:43.000Z

PS C:\Users\panxin\Desktop> python encode.py --image 3d.tif --watermark wm.png --result jm.tif
libpng warning: iCCP: known incorrect sRGB profile
Traceback (most recent call last):
File "encode.py", line 54, in
main()
File "encode.py", line 30, in main
encode(img, wm, res, alpha)
File "encode.py", line 39, in encode
x, y = range(height / 2), range(width)
TypeError: 'float' object cannot be interpreted as an integer

Answer 4 · 2017-06-15T11:42:59.000Z

@pxpy Could you please show me your picture ? My email : xxbbb@vip.qq.com

Answer 5 · 2018-01-29T18:01:42.000Z

I was verified that jpeg format supported.

something wrong when I add argument -- alpha

$python encode.py --image ori.jpg --watermark watermark.jpg --result res.jpg --alpha 5
Traceback (most recent call last):
  File "encode.py", line 55, in <module>
    main()
  File "encode.py", line 31, in main
    encode(img, wm, res, alpha)
  File "encode.py", line 50, in encode
    res_f = img_f + alpha * tmp
TypeError: ufunc 'multiply' did not contain a loop with signature matching types dtype('S32') dtype('S32') dtype('S32')

Answer 6 · 2018-01-30T06:13:53.000Z

@Zola Sorry for that, now I have fixed it.

Answer 7 · 2018-10-25T07:58:45.000Z

The Python3 version of the blind watermark can be used, but it has no effect. It is not the image range is wrong or the watermark cannot be loaded. I hope I can fix it, or I need to know which libraries need to be installed.