/run/media/bill/PROJECTS/System_maintenance/images/image extract.txt
www.BillHowell.ca  04Dec2019 initial 


# /run/media/bill/PROJECTS/Photo Albums/ALBUM-1966-1972-Aust.Isreal/scan20190421_16572741.jpg
# ist column, then 2nd column
#	  upper left   lower right  size_hor  size_ver
#1   437    598   4140  4301   3703      3203
#2   414   4619   4094  8309   3680      3690
#3   483   8763   4163 12397   3680      3634
#2  4715    506   8395  4186   3680      3680
#4  4738   4600   8349  8372   3611      3772
#6  n/a
# probably all points are +-50 pixels?

+-----+
convert - this is already installed

https://askubuntu.com/questions/631689/cropping-images-using-command-line-tools-only
Here is a workaround using convert from image magick pack.
	sudo apt-get install imagemagick
For a picture image.jpg
	 identify image.jpg 
image.jpg JPEG 720x482 720x482+0+0 8-bit DirectClass 100KB 0.000u 0:00.009
As shown above, the input image is 720x482px.

Now to do cropping you have to determine two factors:
    starting point of the cropping (includes 2 directions)
    The cropped rectangle size (Here you can include the other directions)
Now back to the image image.jpg above, I want to crop:
    top 5px
    bottom 7px
    right 14px
    left 3px
then you could do it with (widthxheight+left+top / wxh+l+t format):
	convert image.jpg -crop 703x470+3+5 output.jpg
Now
$ identify output.jpg 
	output.jpg JPEG 703x470 703x470+0+0 8-bit DirectClass 102KB 0.000u 0:00.000
edited Mar 1 at 13:23
el-teedee
1471010 bronze badges
answered Jun 3 '15 at 8:48
Maythux
62.5k3636 gold badges190190 silver badges236236 bronze badges

>> for me (test) : 
see "$d_bin""image crop.sh"


+-----+
Close this application before trying again.
>> what is ruby?

https://itsfoss.com/apt-vs-apt-get-difference/
try 
$ sudo apt install patextract
System management is locked by the application with pid 26896 (/usr/bin/ruby.ruby2.5).
Close this application before trying again.

https://www.linuxquestions.org/questions/linux-newbie-8/what-is-the-open-suse-equivalent-to-apt-get-install-723246/
05-03-2009, 12:20 AM 	  #2
r_sreekumar
LQ Newbie
	
sudo zypper install xxxx
bye
sree

$ sudo zypper install patextract
[sudo] password for root: 
System management is locked by the application with pid 26896 (/usr/bin/ruby.ruby2.5).
Close this application before trying again.

https://wiert.me/2015/08/24/zypper-or-yast-locked-system-management-is-locked-by-the-application-with-pid-usrlibyast2biny2base/
Zypper or YaST locked: System management is locked by the application with pid ##### (/usr/lib/YaST2/bin/y2base).
Posted by jpluimers on 2015/08/24
A simple kill would get rid of that process:
    sudo kill 17730

>> I killed with 
 sudo kill 26896
~
$ sudo zypper install patextract
System management is locked by the application with pid 26896 (/usr/bin/ruby.ruby2.5).
Close this application before trying again.

https://www.phoronix.com/forums/forum/software/desktop-linux/36141-opensuse-13-1-switching-to-ruby-based-yast
>> i.e. ruby is the basis of Yast!!!
How do I get around this?






+-----+
https://linux.die.net/man/1/visgrep
Interesting : 
visgrep(1) - Linux man page
Name
visgrep - Visual grep, greps for images in another image
Synopsis
visgrep [options] image.png detect.pat match.pat ...
Description
visgrep is a program that greps for image in another image.

All .pat files are created using png2pat(1) or rgb2pat(1). The image.png is scanned for detect.pat starting from X,Y given in parameters. When detect.pat is found, then all the match.pat files are scanned at an offset of x,y given in parameters. If a match is found, then visgrep prints the x,y and index of the item.

For example, image.png is a screenshot and match1.pat .. match5.pat are images of letters a to e. Each of these letters is enclosed in a blue box, so detect.pat is an image of the upper left corner of the box. This box is not included in the match*.pat files, so they are actually offset 5 pixels down and 4 pixels to the left. You might run it like this then:

visgrep -x-4 -y5 image.png match_corner.pat match_a.pat match_b.bat ...

Etc, with all matches listed. Now suppose the screen showed ace so visgrep might output:
10,10 0
50,10 2
90,10 4

Showing that match_a.pat (index 0) is at 10,10 on the screen. If no match is found even though the detection image is found, the index will be -1.














# enddoc