Search found 42 matches

by Jean-Pierre Coulon
2018-06-27T06:40:30-07:00
Forum: Users
Topic: Help with hough-lines please
Replies: 3
Views: 315

Re: Help with hough-lines please

Thanks to all.
by Jean-Pierre Coulon
2018-06-26T00:13:55-07:00
Forum: Users
Topic: Help with hough-lines please
Replies: 3
Views: 315

Help with hough-lines please

What is a binary edge image? Are tif or jpg images appropriate? is -stroke the tickness of the lines IM will search or that of the lines it will draw?
by Jean-Pierre Coulon
2018-06-25T02:55:57-07:00
Forum: Users
Topic: Filter to improve some tif images
Replies: 18
Views: 973

Re: Filter to improve some tif images

You can obtain a greyscale example by replacing the header of my brief example with P2 50 15 255 and changing all 1 into 255's. The result will still be black and white only. Sure. But some complain about my using tif or pbm. :) It won't replace data that has been lost. Please read again my request...
by Jean-Pierre Coulon
2018-06-24T23:02:04-07:00
Forum: Users
Topic: Filter to improve some tif images
Replies: 18
Views: 973

Re: Filter to improve some tif images

Then is there the right filter for me in grayscale? Without seeing the original, I can't say. You can obtain a greyscale example by replacing the header of my brief example with P2 50 15 255 and changing all 1 into 255's. I could have named my topic: Filter to improve some jpg or png images The ori...
by Jean-Pierre Coulon
2018-06-24T06:14:04-07:00
Forum: Users
Topic: Filter to improve some tif images
Replies: 18
Views: 973

Re: Filter to improve some tif images

... scan 1 page of sheet music ... Scanning makes continuous-tone images (grayscale or colour). But your image is black and white only. Why? Simply because a grayscale page would be about 10 times bigger than a monochrome. And the original document was monochrome. If you must make it black and whit...
by Jean-Pierre Coulon
2018-06-24T02:16:15-07:00
Forum: Users
Topic: Filter to improve some tif images
Replies: 18
Views: 973

Re: Filter to improve some tif images

Then goto http://imslp.org/wiki/Clarinet_Quintet_in_A_major,_K.581_(Mozart,_Wolfgang_Amadeus) Search the viola part in the Scanned by Coulonnus section. Extract p.2 with pdftk. Say magick p2.pdf -quality 100% -density 600 p2.jpg and magick p2.jpg -threshold 50% -compress group4 p2.tif (for some reas...
by Jean-Pierre Coulon
2018-06-23T17:39:25-07:00
Forum: Users
Topic: Filter to improve some tif images
Replies: 18
Views: 973

Re: Filter to improve some tif images

You can obtain a test page like this: 1: scan 1 page of sheet music at 600 dpi, tif format, with an intentional skew of about 1 degree. Should be about 100 kB big. 2: say magick thispage.tif -deskew 50% newpage.tif. Should give an about 200 KB big page. Magnify a portion of a staff line a lot and yo...
by Jean-Pierre Coulon
2018-06-23T03:25:45-07:00
Forum: Users
Topic: Filter to improve some tif images
Replies: 18
Views: 973

Re: Filter to improve some tif images

So, your image has noise. You want to remove the noise while not removing detail. From such a small sample I can't tell what is noise and what is detail. I would be happy if my 6th line was transformed into 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 However,...
by Jean-Pierre Coulon
2018-06-23T02:43:28-07:00
Forum: Users
Topic: Filter to improve some tif images
Replies: 18
Views: 973

Re: Filter to improve some tif images

fmw42 wrote:
2018-06-22T22:31:50-07:00

Code: Select all

convert -version
will give you the ImageMagick version.
hey, there is an old version in your brains :-) Here it works only with magick -version and it says 7.0.5-0 Q8 x86
by Jean-Pierre Coulon
2018-06-22T19:44:14-07:00
Forum: Users
Topic: Filter to improve some tif images
Replies: 18
Views: 973

Re: Filter to improve some tif images

I hope an inline pbm does'nt spam this forum :) P1 50 15 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0...
by Jean-Pierre Coulon
2018-06-22T08:19:01-07:00
Forum: Users
Topic: Filter to improve some tif images
Replies: 18
Views: 973

Re: Filter to improve some tif images

How can I attach a sample that is not on the web?
by Jean-Pierre Coulon
2018-06-22T07:38:38-07:00
Forum: Users
Topic: Filter to improve some tif images
Replies: 18
Views: 973

Filter to improve some tif images

I have a tif image with many horizontal and vertical lines. When I zoom a horizontal line I often see irregular borders between the black and white areas. Translating this in .pbm this gives several full of zeroes, a line like 000001010010110011111 and several lines full of ones. If I could transfor...
by Jean-Pierre Coulon
2018-06-22T00:22:01-07:00
Forum: Users
Topic: Why are spaces forbidden in the -convolve argument
Replies: 4
Views: 483

Re: Why are spaces forbidden in the -convolve argument

With Windows I obtain what I want with
magick chunk.png -convolve ^
0,0,3,4,3,0,0,^
3,4,4,4,4,4,3,^ etc.
by Jean-Pierre Coulon
2018-06-21T04:38:15-07:00
Forum: Users
Topic: Why are spaces forbidden in the -convolve argument
Replies: 4
Views: 483

Why are spaces forbidden in the -convolve argument

magick -convolve 1,1,1,1,1,1,1,1,1 works well but fails if I say 1,1,1, 1,1,1, 1,1,1. This would help me to arrange my array when it is bigger e.g. 7x7.

Any workaround?
by Jean-Pierre Coulon
2018-02-24T03:47:11-07:00
Forum: Kudos and Rants
Topic: Why is there an off-topic add at the top of each imagemagick.org page?
Replies: 13
Views: 18661

Re: Why is there an off-topic add at the top of each imagemagick.org page?

I make many Google searches about music and here I see ads about banking, savings etc. What is Google's logic? :lol: