I would like to colorize an image with two colours, red on the left half and green on the right half but the colorize function just adds a coloured overlay to the image rather than multiplying it on. So I would like my image to look like this but it is currently looking like this. Here is the original image
My code at the moment is this:
convert normal.png \
\( -clone 0 -crop 50x100% -fill red -colorize 60% \) \
\( -clone 0 -crop 50x100%+64 -fill green -colorize 60% \) \
-delete 0 -background none -flatten result.png
I have tried adding -compose multiply -composite to the code but I just get this which has the right effect but I cannot get it to the position that I want, heres the code for that:
convert normal.png \
\( -clone 0 -crop 50x100% -fill red -colorize 70% \) \
\( -clone 0 -crop 50x100%+64 -fill green -colorize 70% \) \
-background none -compose multiply -composite result.png
One simple approach would be to assemble the red-green overlay inside parentheses, then do a multiply composite over the input image.
magick lena_circ.png -size %wx%h \
\( xc:red xc:green +append -scale 50x100% \) \
-compose multiply -channel rgb -composite result.png
That command give me this result...
Related
I want to make a children's treasure hunt where the next location is given by a picture e.g.
To make a more suitable printable picture, I can use -canny like this:
convert hut.jpg -canny 0x1+10%+30% -negate hutCanny.jpg
To make it more interesting, I was thinking that I want to make two images -one with horizontal lines and one with vertical lines:
convert hut.jpg -colorspace gray -morphology Convolve Sobel -negate hutH.jpg
convert hut.jpg -colorspace gray -morphology Convolve Sobel:90 -negate hutV.jpg
I would like the location to be only guessable when both picture are found and can be combined using a light source. The problem is that Sobel not only detects vertical lines but also angled lines. As can be seen, the location is far too easy to recognise with just one picture. I have been trying with different kernels and trying to erode the pictures. -nothing woks.
How do I make two images that by themselves are not 'guessable' but can be combined to one. e.g. by making one image with only near horizontal lines and an other with only near vertical lines?
You could do something like the following in ImageMagick. Make a random mask and apply it to the image. Then invert the mask and do the same. The two images, when added together, will make the input.
Input:
convert \( hut.png -write mpr:img +delete \) \
\( mpr:img +noise random -channel g -separate +channel -blur 0x5 -threshold 50% +write mpr:mask +delete \) \
\( mpr:img mpr:mask -compose multiply -composite +write hut_out1.png \) \
\( mpr:img \( mpr:mask -negate \) -compose multiply -composite +write hut_out2.png \) \
null:
Output 1:
Output 2:
ADDITION
If it has to be grayscale, then you can do the above and make each output gray.
convert \( hut.png -write mpr:img +delete \) \
\( mpr:img +noise random -channel g -separate +channel -blur 0x5 -threshold 50% +write mpr:mask +delete \) \
\( mpr:img mpr:mask -compose multiply -composite -colorspace gray +write hut_out1.png \) \
\( mpr:img \( mpr:mask -negate \) -compose multiply -composite -colorspace gray +write hut_out2.png \) \
null:
Output 1:
Output 2:
Now add them together to reconstitute:
convert hut_out1.png hut_out2.png -evaluate-sequence add hut_out12.png
We need to put 'information bar's to thousands of image files. For like a week or so i'm trying to learn imagemagick but i just couldn't figure this many elements out so i wanted to ask for a help here.
I get the idea of '-/+append'ing elements and swapping between them but when it comes to 3x3 matrix cells and text/image mixings, i just can't do it. As an example, i can get the 3 rows appended and a column next to it but i can't get to the next step of 'appending 2 more rows together then put them as a column block again' because when i try, all those append gets right or bottom as a whole image.. Well, you will get the idea when you see my brief image below..
magick.exe -size 150x100 -gravity center caption:"txt2" caption:"txt3" caption:"txt4" \
-append -size 94x294 xc:white -border 3 -swap 0,1 \
+append outoutout.jpg
FYI, height/width of rows/columns are there just for example not important.. And here comes MSPaint skills:
You have to create each section separately using parenthesis processing. Then if you want append them appropriately. Alternately, you can create a background image and compose ... -composite each image into its correct location.
Here is an example in ImageMagick using the second method.
Unix Syntax:
magick -size 400x400 xc:white \
\( barn.jpg -crop 400x200+0+0 +repage \) \
-geometry +0+0 -compose over -composite \
\( -size 100x200 xc:white -shave 5x5 -bordercolor black -border 5 \) \
-gravity northwest -geometry +0+200 -compose over -composite \
\( -size 100x200 -background white -gravity center -fill black \
-font Candice label:"Text1\n\nText2\n\nText3" \) \
-gravity northwest -geometry +100+200 -compose over -composite \
\( -size 100x200 -background skyblue -gravity center -fill red \
-font Arial label:"First_line\n\n\nSecond_line" \) \
-gravity northwest -geometry +300+200 -compose over -composite \
result.png
See for example:
parenthesis processing
appending
convert ... -composite
I'd need to set the size relative to the size already set. I'd need it because my flow involves defining primitives inside other ones. Eg
convert -size 200x100 xc:black \( -size 30x40% xc:red \) -gravity West -composite out.png
That 30x40% is not working this way, it becomes pixels 30x40. I can achieve this specific goal in the first example by using resize
convert -size 200x100 xc:black \( xc:red -resize 30x40% \) -gravity West -composite out.png
In this second version, xc:red inherits the size 200x100, so -resize works as expected. Though the size of further/inner primitives are not reduced to 60x40, it remains 200x100, so in the third example, the green rectangle has orientation landscape and not portrait
convert -size 200x150 xc:blue \
\( xc:red -resize 50x100% \
\( xc:green -resize 40% \) \
-gravity Center \
-composite \
\) \
-gravity West \
-composite \
out.png
So green area is 80x60 pixels, 40% of 200x150. I'd like to somehow reset the size to the size of xc:red after resize by the time I'm introducing xc:green.
I think you are trying to create canvases whereby each one is a percentage of the the size of the previous one. There may be an easier way, but you could save each canvas (and implicitly its size) in a MPR "Magick Persistent Register" (named lump of RAM) as you create it, then recall the latest one and overwrite it each time you want to do something relative to that:
convert -gravity west -size 200x100 xc:black -write MPR:S \
\( MPR:S -resize 30x40% -fill red -colorize 100 -write MPR:S \) -composite \
\( MPR:S -resize 50x50% -fill blue -colorize 100 -write MPR:S \) -composite \
\( MPR:S -resize 50x50% -fill lime -colorize 100 \) -composite result.png
Alternatively, you could let your bash/POSIX shell do it for you inside an "arithmetic expression":
W=200
H=100
convert -gravity west -size ${W}x${H} xc:black \
\( -size $((W=W*30/100))x$((H=H*40/100)) xc:red \) -composite \
\( -size $((W=W*50/100))x$((H=H*50/100)) xc:blue \) -composite \
result.png
Be aware that the shell only deals with integer maths, so it's not going to end well if you aim for 50% of 25 pixels...
Hi I would like to create a mask image with "special corners" I am calling them special because I don't really know how to call them in english here is what I would like to achieve:
what I am using now is
convert xc:black -size 300x300 -fill white -draw "roundrectangle 3,3,296,296,5,5"
but this gives me rounded corners. Thank you in advance for any suggestions.
Here's one way of doing it.
convert -size 300x300 xc:none \
-shave 10 -bordercolor black -border 10 \
-fill black -draw "polyline 0,0 30,0 0,30" \
\( +clone -flip \) -gravity north -composite \
\( +clone -flop \) -gravity south -composite -background white -flatten result.png
That says... "Draw a rectangle your full size and transparent, shave 10 pixels off all round and add a 10 pixel black border (easier than doing the maths and making a 280x280 and adding 10 on each side). Draw a triangle in the top-left. Copy the whole shape and flip it and draw it on top of the original. Copy the whole shape and flop it and draw it again on the original. Now make all the transparent areas white."
Here is another way - maybe a little easier. Draw the original square, then copy it, enlarge it by square-root(2) (i.e. 141%), thicken the borders, rotate 45 degrees and composite it onto itself. Kinda depends how your brain works!
magick -size 300x300 xc:none -shave 10 -bordercolor black -border 10 \
\( +clone -scale 142% -shave 30 -border 30 -rotate 45 \) \
-gravity center -composite -background white -flatten result.png
Here is a link to a page showing how to do what you want along with other effects https://www.imagemagick.org/Usage/thumbnails/#rounded
This is the code from the page:
convert thumbnail.gif -alpha set -compose DstOut \
\( -size 20x15 xc:none -draw "polygon 0,0 0,14 19,0" \
-write mpr:triangle +delete \) \
\( mpr:triangle \) -gravity northwest -composite \
\( mpr:triangle -flip \) -gravity southwest -composite \
\( mpr:triangle -flop \) -gravity northeast -composite \
\( mpr:triangle -rotate 180 \) -gravity southeast -composite \
corner_cutoff.png
You should check out the examples as there is another method you could use for smaller images.
I want to create a flare image using imagemagick and then add text on top of it. I was thinking that it was going to be quite easy, but I am having issues adding the text on top of the generated image.
This is so far what I have (keep in mind that the text as well as the dimension are dynamic):
FLARE:
\(
-fill transparent -size 300x1 xc: +noise Random -channel G -separate +channel \
-scale 300x300\! \
\( -size 300x300 gradient: -evaluate cos .5 \) \
-compose hardlight -composite \
-virtual-pixel HorizontalTileEdge -distort Polar -1
\)
TEXT
-fill red \
-gravity center \
-font Arial \
annotate:"Logo 12345678"
EDIT:
The text is showing, but I can't figure out how to overimpress the text on top of the image in a way that it will fill the image for the full width (from left to right, with some padding if possible)
Figured out:
convert \
\( -background transparent -size 300x1 xc: +noise Random -channel G -separate +channel -scale 300x300\! \( -size 300x300 gradient: -evaluate cos .5 \) -compose hardlight -composite -virtual-pixel HorizontalTileEdge -distort Polar -1 \) \
\( -background transparent -size 300x300 -fill blue -gravity center -font Arial caption:"Logo \\n13474899" \) \
-gravity center -composite /tmp/flare_2_final.png
Now I need to figure out how to change the background color of the flare from black to gray and I am done.