I want to add logo on product image with engraving effect.
The original logo is
After adding it on the product it should look like this.
how to do this with imagemagick.
Using this as the trophy:
Then something along these lines:
convert trophy.jpg -gravity center \
\( G.png -colorspace gray -channel a -evaluate multiply 0.2 -resize 120x120 \) -composite result.png
So, I am basically loading the trophy, then in some "aside processing" in parentheses, loading the Google logo, converting it to greyscale, reducing the opacity by multiplying it by 0.2, resizing it and compositing it on top of the trophy.
By the way, if you were using GraphicsMagick, which doesn't have the parentheses I used to make sure I only convert the logo to greyscale and not the trophy, you would do it in a different order. First load the logo and process it (greyscale, resize etc), then load the trophy, then swap the order so the trophy goes to the background, like this:
gm convert G.png -colorspace gray -resize ... trophy.jpg -swap -composite result.png
Related
Friends,
I need to -trim some images but keep the original canvas size. Works like this:
convert in.png -fuzz 10% -trim -background white -set page "%[fx:w]x%[fx:h]" +repage out.png
But how can I position the trimmed image part at it's original position? -gravitiy center is not an option as the to-be-trimmed part usually not at the canvas center.
Any ideas?
You should be able to -trim an image, then use -flatten to lay it back onto its original canvas. Try this command...
convert logo: -background none -trim -flatten trimmed.png
#GeeMack's answer is certainly simpler and more succinct, but if you need more flexibility for dinking around, another way is to get the image height and width and the trimbox in one invocation and use them in the next - maybe with adaptation.
So, starting with this image:
# Get image width and height and the trim-box
read geom trim < <(magick start.png -format "%G %#" info:)
# Make a new white canvas same size as original and trim new image onto it
magick -size $geom xc:white \( start.png -crop $trim \) -flatten result.png
I put an artificial yellow border around it so you can see the extent of it on SO's white background.
This is not a finding edge problem but I am trying to find the background color of the image, in order to find it, I am trying to get the edge of the image and guess the best color.
In order to do so, I want to remove the center of the image and just get image like a frame with transparent center.
Is it possible through ImageMagick?
For example
If want
Try this tested on Windows with IM V7:
magick "input.png" ( -size 200x200 xc:black ) -gravity center -compose DstOut -composite "output.png"
Takes the original photo, creates a rectangular mask, places it over the middle of the image and "cuts" out the rectangle
If the input is not a png ( for instance a jpg ) you will have to do some work setting the alpha channel
EDIT: This seems to work for both jpg and png images
magick "input.png" -alpha on ( -size 200x200 xc:black ) -gravity center -compose DstOut -composite "output.png"
I'll offer a simple variation on Bonzo's solution. This command allows you to specify in pixels the amount of edge you want to keep...
magick input.jpg -alpha on -bordercolor none -background none ^
( +clone -shave 24 -border 24 ) -compose dstout -composite output.png
It reads the input image, sets the alpha "on", and sets the border and background colors to "none".
Then inside the parentheses it makes a clone of the input image, shaves off the amount you want to retain around the edges, then adds that amount back as a transparent border all around. That will be the mask.
Then after the parentheses use a compose method of "dstout" to composite that mask onto the input image, which results in a transparent "hole" in the image with your specified amount of the original edge retained.
If you want to keep different amounts from the vertical and horizontal edges, specify those amounts in the shave and border operations...
... -shave 24x32 -border 24x32 ...
If you're using IMv7 you can even use FX expressions to specify the widths...
... -set option:v1 %[fx:(w+h)/2*0.1] -shave %[v1] -border %[v1] ...
The command is in Windows syntax using IMv7. Change "magick" to "convert" to use it with IMv6. To make it work in *nix you need to change the continued-line caret "^" to a backslash "\" and escape the parentheses with backslashes "\(...\)".
I have used the following imagemagick command for the image below:
convert img.png -define morphology:compose=darken -morphology Thinning Rectangle:17x1+0+0\< tmp.png
This removes ALL lines from the image, but I just want to remove the small horizontal and vertical lines on the right and bottom of the number in top left corner of each block. I want to preserve the main column and row lines. Can anyone tell me how to do it?
This is what I get (notice the long lines dividing the image content into columns and rows are also gone. I want those line to stay):
I notice the script is finer/thinner and less regular than the lines so it is more susceptible to eroding techniques. With that in mind we can ditch the text like this:
convert vcards.png -colorspace gray -threshold 50% -morphology erode disk:1.5 +repage z1.png
That's a good start, but if we use that as a mask, we will lose the long horizontal lines in your original image. So, we can find all those by projecting all the rows into a single-pixel wide tall column and thresholding all the rows that are more than 80% white. Then widen the image back out to its original width.
convert z1.png -colorspace gray -resize 1x\! +repage -threshold 80% -scale 810x1518\! +repage z2.png
Now combine the two masks so they only do the lower and right sides of your little title box things.
convert z1.png \( z2.png -negate \) -compose darken -composite z3.png
Finally, fatten that mask up a bit because it may have shifted around during previous processing, and apply it to your original image.
convert vcards.png \( z3.png -morphology dilate disk:2 -negate \) -compose darken -composite result.png
It could all be combined into a single command, but I won't do that, because some aspects may not work for all your images and while they are all individually implemented and documented, they are simpler to improve or correct individually.
you can use the followin code for horizontal an change it slightly for vertical lines
magick 21.gif -monochrome ( +clone -negate -statistic median 219x1 ) -compose lighten -composite q1.png
So here is my original image (note the transparent border) src.png:
Here's the mask I want to use to crop. White means keep, black means crop mask.png: (Note that it isn't necessarily going to be a square. It could be a heart or a star or anything)
I also have transparent.png, which is a fully transparent image. All three images have the same dimensions.
So, running this command generates the following image:
convert transparent.png src.png mask.png -composite out.png
Which is masking perfectly, but now I want it cropped to the size of the white mask area. Using -trim is sort of close, but it gets rid of the transparent areas that are inside the mask.
How can I resize the masked image to the size of the white area in the mask?
I am not sure I understand what you want for the result. Why do you need the fully transparent image? Do either of these do what you want?
Full sized transparent image with masked area showing:
convert src.png mask.png -alpha off -compose copy_opacity -composite result1.png
Trimmed to just the part you want:
convert src.png mask.png -alpha off -compose copy_opacity -composite -trim +repage result2.png
Not sure I understand what you are trying to do, not least why you need a full size transparent canvas. Your command does not give the same results on my ImageMagick version 7.
This command may be what you are looking for:
convert src.png mask.png -compose darken -composite -trim out.png
It gives this - I have artificially added a red border so you can see the full extent on StackOverflow's white background:
Or maybe you want the trim box from your mask and to use that to crop your source:
convert mask.png -format %# info:
113x113+570+33
convert src.png -crop 113x113+570+33 result.png
If you want to crop a square from picture, you no needs using mask, just crop it:
magick Uq328.png -crop -crop 111x111+570+331 +repage cropped.png
according to https://legacy.imagemagick.org/Usage/crop/
I have two images. One is background with no alpha. The other is a white cloud. The alpha of the cloud image is premultiplied with black. When I composite them the white cloud has black in it, so it looks grey instead of white like it should. I'm doing:
convert -gravity Center bg.tga whitecloud.tga -composite comp.tga
Is there a way to composite premultiplied images in ImageMagick, or does the image have to be non-premultiplied? Can I make a premultiplied image non-premultiplied using ImageMagick?
Update:
Ok, here are the images as TGA for download:
http://acatysmoof.com/posting/problems/imagemagick/premultiplication/bg.tga
http://acatysmoof.com/posting/problems/imagemagick/premultiplication/whitecloud.tga
http://acatysmoof.com/posting/problems/imagemagick/premultiplication/aftereffects.tga
http://acatysmoof.com/posting/problems/imagemagick/premultiplication/imagemagick.tga
and in the same order as jpgs to view in your browser:
I tried all the modes provided, but none of them create the same result as After Effects.
It would be easier if you showed your images, but try adding -compose lighten before -composite in your command, like this:
convert a.tga b.tga -compose lighten -composite out.tga
Basically that will make ImageMagick choose the lighter pixel of the two images at every point.
If that doesn't work, try other blending modes
for b in $(identify -list compose); do
convert -label "$b" bg.tga whitecloud.tga -compose $b -composite miff:-
done | montage - -tile 5x out.png
I am kind of thinking Atop, Dissolve, SrcAtop and SrcOver might be your friends but have a look full-size and see what floats your boat. That would be
convert a.tga b.tga -compose Atop -composite out.tga
Here is an Imagemagick command that does what you want:
convert -gravity Center whitecloud.tga -fx "u/max(u.a, 1/255)" bg.tga +swap -composite -fx "u*u.a" comp.tga
What's happening here?
-fx command #1: Convert whitecloud.tga from premultiplied alpha to "normal". The max() operator is a special case to avoid dividing by zero.
+swap command: Make bg.tga the first image and the revised whitecloud.tga the second.
-composite these two regular, non-premultiplied images.
-fx command #2: take the result, and return to a premultiplied alpha format.
This gives exactly the same result as After Effects.
Note that, as I wrote it, it only works for an opaque bg.tga. You'd need to do some extra work to handle a transparent background image.
If you want to duplicate the After Effects result, then I believe what you want to do in ImageMagick is the following -- composite the background image with a white image using the cloud as a mask:
convert bg.tga \( -clone 0 -fill white -colorize 100 \) whitecloud.tga -compose over -composite cloud_blue.tga
I have posted a JPG result, but my .tga result is the same.