VISGREP(1)VISGREP(1)NAMEvisgrep - Visual grep, greps for images in another image
SYNOPSISvisgrep [options] image.png detect.png match.png ...
DESCRIPTIONvisgrep is a program that greps for image in another image.
The detect.png and match.png files can also be .pat files.
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 parame‐
ters. 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 vis‐
grep 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.
OPTIONS
A summary of options is included below.
-h Show summary of options.
-x Set x offset for detection matching.
-y Set y offset for detection matching.
-X Start scanning at X.
-Y Start scanning at Y.
-t Set tolerance for 'fuzzy' matches, higher numbers are more tol‐
erant.
EXIT STATUS
0 at least one match was made.
1 no matches were made.
2 an error occured.
SEE ALSOpat2ppm(1), patextract(1), png2pat(1), rgb2pat(1), xte(1).
AUTHORvisgrep was written by Steve Slaven <bpk@hoopajoo.net>.
This manual page was written by Aurelien Jarno <aurel32@debian.org>,
for the Debian project (but may be used by others).
April 20, 2004 VISGREP(1)
