2.3. LISTMANIPULATION
51
Example39:image.jpg -split t x -remove[0-50%:2] -append x
2.3.6 -remove
duplicates
Removeduplicatesimagesintheselectedimageslist.
Example40:(1,2,3,4,2,4,3,1,3,4,2,1) -split t x -remove
duplicates -append x
2.3.7 -remove
empty
Removeemptyimagesintheselectedimagelist.
2.3.8 -reverse(+)
Reversepositionsofselectedimages.
(eq.to
’-rv’
).
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52
CHAPTER2. LISTOFCOMMANDS
Example41:image.jpg -split x,3 -reverse[-2,-1]
Example42:image.jpg -split x,-16 -reverse[50%-100%] ] -append x
2.3.9 -sort
list
Arguments:
ordering={ +
| - - },
criterion
Sortlistofselectedimagesaccordingtothespecifiedimagecriterion.
Defaultvalues:
• ’ordering=+’, ’criterion=i’.
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2.4. MATHEMATICALOPERATORS
53
Example43:(1;4;7;3;9;2;4;7;6;3;9;1;0;3;3;2) -split y y -sort
list + -append y
2.3.10 -sort
str
Sortselectedimages(viewedasalistofstrings)inlexicographicorder.
2.4 Mathematicaloperators
2.4.1 -abs(+)
Computethepointwiseabsolutevaluesofselectedimages.
Example44:image.jpg --sub {ia} -abs.
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54
CHAPTER2. LISTOFCOMMANDS
Example45:300,1,1,1,’cos(20
*
x/w)’ --abs -display
graph 400,300
2.4.2 -acos(+)
Computethepointwisearc-cosineofselectedimages.
Example46:image.jpg --normalize -1,1 -acos.
Example47:300,1,1,1,’x/w+0.1
*
u’ --acos -display
graph 400,300
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2.4. MATHEMATICALOPERATORS
55
Tutorialpage:
http://gmic.eu/tutorial/trigometric-and-inverse-trigometric-commands.
shtml
2.4.3 -add(+)
Arguments:
• value[%]
• [image]
• ’formula’
• (no arg)
Addspecifiedvalue,imageormathematicalexpressiontoselectedimages,orcomputethepointwisesumof
selectedimages.
(eq.to
’-+’
).
Example48:image.jpg --add d 30% % -cut 0,255
Example49:image.jpg --blur 5 5 -normalize 0,255 5 -add[1] [0]
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56
CHAPTER2. LISTOFCOMMANDS
Example50:image.jpg -add d ’80
*
cos(80
*
(x/w-0.5)
*
(y/w-0.5)+c)’ -cut t 0,255
Example51:image.jpg -repeat 9 --rotate[0] ] {$>
*
36},1,0,50%,50% -done -add -div 10
2.4.4 -and(+)
Arguments:
• value[%]
• [image]
• ’formula’
• (no arg)
ComputethebitwiseANDofselectedimageswithspecifiedvalue,imageormathematicalexpression,or
computethepointwisesequentialbitwiseANDofselectedimages.
(eq.to
’-&’
).
2.4. MATHEMATICALOPERATORS
57
Example52:image.jpg -and {128+64}
Example53:image.jpg --mirror r x x -and
2.4.5 -asin(+)
Computethepointwisearc-sineofselectedimages.
58
CHAPTER2. LISTOFCOMMANDS
Example54:image.jpg --normalize -1,1 -asin.
Example55:300,1,1,1,’x/w+0.1
*
u’ --asin -display
graph 400,300
Tutorialpage:
http://gmic.eu/tutorial/trigometric-and-inverse-trigometric-commands.
shtml
2.4.6 -atan(+)
Computethepointwisearc-tangentofselectedimages.
Example56:image.jpg --normalize e 0,8 8 -atan.
2.4. MATHEMATICALOPERATORS
59
Example57:300,1,1,1,’4
*
x/w+u’ --atan n -display
graph 400,300
Tutorialpage:
http://gmic.eu/tutorial/trigometric-and-inverse-trigometric-commands.
shtml
2.4.7 -atan2(+)
Arguments:
• [x
argument]
Computethepointwiseorientedarc-tangentofselectedimages.
Eachselectedimageisregardedasthey-argumentofthearc-tangentfunction,whilethespecifiedimage
givesthecorrespondingx-argument.
Example58:(-1,1) (-1;1) -resize 400,400,1,1,3 -atan2[1] [0] ] -keep[1] ] -mod {pi/8}
Tutorialpage:
http://gmic.eu/tutorial/trigometric-and-inverse-trigometric-commands.
shtml
60
CHAPTER2. LISTOFCOMMANDS
2.4.8 -bsl(+)
Arguments:
• value[%]
• [image]
• ’formula’
• (no arg)
Computethebitwiseleftshiftofselectedimageswithspecifiedvalue,imageormathematicalexpression,or
computethepointwisesequentialbitwiseleftshiftofselectedimages.
(eq.to
’-<<’
).
Example59:image.jpg -bsl ’round(3
*
x/w,0)’ -cut 0,255
2.4.9 -bsr(+)
Arguments:
• value[%]
• [image]
• ’formula’
• (no arg)
Computethebitwiserightshiftofselectedimageswithspecifiedvalue,imageor”mathematicalexpression,
orcomputethepointwisesequentialbitwiserightshiftofselectedimages.
(eq.to
’->>’
).
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