I tried, with imagemagick, to simulate an upper light spot adding drop shadows to every sides of a png picture using the following code:
#!/usr/bin/env sh
imageshadow()
{
out=${1%.*}-shadow.${1#*.}
in=$1
if [ ! -z $2 ]; then
convert $in -frame $2 $out
in=$out
fi
convert $in -bordercolor "#eee8d5" -border 4 \
\( -clone 0 -background black -shadow 40x3+3+3 \) \
\( -clone 0 -background black -shadow 40x3-3-3 \) \
-reverse -background none -layers merge +repage $out
}
imageshadow $1
I got the wanted drop shadows but there is a break on the upper right and bottom left side of the picture and I am not able to get rid of them.
Related
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...
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'm trying to find a good way to add a 3px white stroke to a ton of png files, effectively to make them look like "stickers." I've got some sample code that does a decent job, but I can't seem to get the cropping right. Also, the stroke looks a bit pixelated and I wanted to know if it's possible to get cleaner edges!
I did a bunch of internet scouring, found some sample code, tweaked it around, and came to something that almost resembles what I'm looking for. The images are always going to be PNGs, so I looked into things like inkscape/gimp from the command line but realized I should be able to do this just using convert from the terminal.
convert in.png \
\( -clone 0 -alpha extract -threshold 0 \) \
\( -clone 1 -blur 10x65000 -threshold 0 \) \
\( -clone 2 -fill red -opaque white \) \
\( -clone 3 -clone 0 -clone 1 -alpha off -compose over -composite \) \
-delete 0,1,3 +swap -alpha off -compose copy_opacity -composite \
out.png
in:
out:
ideally:
Your main problem is it is that you do not have enough space bettween your object and the sides of the image. You just need to add your image with transparency and then remove any excess later.
In ImageMagick 6, this should do what you want.
1) read the input
2) add a larger border than you need to add
3) extract the alpha channel from the input and dilate it by the amount of border (in this case 10)
4) copy the previous image and color the white as red and the black as transparent
5) composite the original over the red/transparent image
6) delete the original and the red/transparent image
7) swap the composite with the dilated alpha channel and put the dilated alpha channel into the alpha channel of the previous image
8) trim the excess transparency from the border padding
9) save to output
convert img.png \
-bordercolor none -border 20 \
\( -clone 0 -alpha extract -morphology dilate diamond:10 \) \
\( -clone 1 -fuzz 30% -fill red -opaque white -fill none -opaque black \) \
\( -clone 2,0 -compose over -composite \) \
-delete 0,2 \
+swap -alpha off -compose copy_opacity -composite \
-trim +repage \
result.png
For ImageMagick 7, replace convert with magick.
If on a Unix-like system, you might be interested in my bash ImageMagick script, contour, at http://www.fmwconcepts.com/imagemagick/index.php
A better result can be achieved by replacing diamond:10 with disk:10
I want to create a 3D effect on an image so it looks like a folder, using the +distort Perspective' commands from ImageMagick.
However, if I use the distort multiple times (on different layers) in ImageMagick the result doesn't look correct.
Please see the attached image, left is correct, but the top-right corner of the right image looks strange.
I have used the following commands:
convert square.jpg -brightness-contrast 0x0 -resize 700x700 \
\( -clone 0 -flip -crop 700x140+0-0 -size 700x140 gradient:gray60-black -compose CopyOpacity -composite \) \
-append front.png
convert square.jpg -brightness-contrast -50x0 -resize 700x700 \
\( -clone 0 -flip -crop 700x140+0-0 -size 700x140 gradient:gray60-black -compose CopyOpacity -composite \) \
-append inner.png
convert -background None -virtual-pixel transparent -background white \
\( inner.png +distort Perspective '0,0 0,0 700,0 735,-35 700,700 735,665 0,700 0,700' \) \
\( front.png +distort Perspective '0,0 0,0 700,0 665,35 700,700 665,735 0,700 0,700' \) \
-layers merge +repage 3dimage.jpg
I'm using ImageMagick v6.8
I'm not sure if I understand the layers in ImageMagick correctly.
Can someone see what's wrong? Thanks!
I'm not sure if I understand the layers in ImageMagick correctly. Can someone see what's wrong?
You're doing fine. Just need to repeat the -virtual-pixel transparent on the sub-image for front.png (and perhaps the inner.png too).
convert -background None -virtual-pixel transparent -background white \
\( inner.png +distort Perspective '0,0 0,0 700,0 735,-35 700,700 735,665 0,700 0,700' \) \
\( front.png -virtual-pixel transparent +distort Perspective '0,0 0,0 700,0 665,35 700,700 665,735 0,700 0,700' \) \
-layers merge +repage 3dimage.jpg
I am trying to use an Imagemagick command to create a single-letter text label, give it a shadow, place it on the left side of a fixed-size canvas area, and then append this it another label of fixed height but unknown width. So, the desired result is a single letter on the left side of the final transparent PNG, and another label set about 100px to the right of the origin, e.g. this mockup:
I have all of this working in the following command, except that the shadowed text label is not in a fixed size box (should be 100px by 25px). Here's the result:
I think that what I need to do is to turn off the -trim option somehow, but I'm not sure how to do that. +trim is not a valid option, and +repage doesn't do it.
convert \
\( -background transparent \
\( -gravity west -fill lavender -font Constantia.ttf \
-pointsize 12 label:'x' -trim \
\( +clone -background black -shadow 100x3+0+0 -channel A -level 0,50% \
+channel \) \
+swap +repage -gravity center -composite \) \
-size 100x25 -gravity west \) \
\( -size x25 -fill black -background transparent -font MyriadPro-Semibold.otf \
-pointsize 15 label:'Long legend for x' -gravity west \) \
+append -strip legend_test.png
(The trim option is needed to get the height down to 25px--the shadow operation generates too large a vertical extension otherwise. EDIT: And I guess I was wrong above--even w/o the -trim anywhere in the command, the fixed-size image I'm hoping for doesn't work out.)
Hm, looks like there isn't much of a community for ImageMagick left here. I posted to the ImageMagick phpBB board and was able to put together an answer. Briefly:
The -trim option is not an option that affects every image after it is invoked. Instead, it is essentially a command that executes immediately.
The -extent option can be used to increase or decrease an image to a desired size. Apparently the -size command, which I used in my original code, can only be used to set the initial size of an image, not to change the size of an image that already exists.
Here is the final working command:
convert \
\( -background transparent -extent 100x25 -gravity west \
\( -fill lavender -font Constantia.ttf \
-pointsize 12 label:'x' -trim -extent 100x25 -gravity west \
\( +clone -background black -shadow 100x3+0+0 -channel A -level 0,50% \
+channel \) \
+swap +repage -gravity center -composite \) \
-background transparent -extent x25 \) \
\( -size x25 -fill black -background transparent -font MyriadPro- Semibold.otf \
-pointsize 15 label:'Long legend for x' -gravity west \) \
+append -strip legend_test.png