Legacy ImageMagick Discussions Archive

Hi all,

Let's say we have a square image of 500x500. We want to use the bottom 500x200 for loyalty stamps.

Suppose we know the max number of images (different for each use), could we lookup that number (we can, let's say it is 10 stamps), divide the width by that number and distribute evenly somhow so it will oook nice?

For example, if
n=5, we get 1 row of 5 stamps (50 by 50px).
n=10, 2 rows of 5 columns,
n=12, 2x6 (33x33px),
n=20 => 2x10 (25x25px)

I can see we can pre-calculate some of the options before writing the stamps on the image in the set locations, but is there a programmatic way of doing this so it always calculates the most economic/best filling amount of space/images?

It's so very versatile that I figured I ask some pros here before doing it the dumb way

Thanks a ton.

Suppose we know the max number of images (different for each use), could we lookup that number (we can, let's say it is 10 stamps), divide the width by that number and distribute evenly somhow so it will oook nice?

This is not very clear to me. Could you explain in more detail or differently and perhaps provide a diagram of what you are trying to do.

Divide the width of what? Distribute in what way to "look nice"? What does "nice" mean?

Hi,

The width of the original image (the stamp card).
"Nice" means evenly distributed:-).

Do these images help at all? The smileys would be the amount of total stamps, but those are not always the same. It should become a setting/PHP variable that we give later.

Thanks for taking time to read the post and give possible pointers.

Still a bit confused. Do you have separate images for the "Some Stuff" and for each smiley image? And do you want to resize the width of any smiley image to same width as the "Some Stuff" image? If so, what do you need to do with the height of the smiley images? If you do not care, then just compute the width of the "Some Stuff" image once. Then loop over each smiley image and resize it and -append the two.

Do I misunderstand what you are trying to do?

In IM 7, you can do

(unix syntax)

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magick some_stuff.png -set option:wd "%w" \( smileys.png -resize "%[wd]x" \) -append result.png

In IM 6, you will have to do

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convert some_stuff.png smileys.png \
-set option:distort:viewport "%[fx:u.w]x%[fx:u.h]-%[fx:(u.w-v.w)/2]-%[fx:(u.h-v.h)/2]" \
-distort SRT "%[fx:(t==1)?(u.w/v.w):1] 0" \
-append some_stuff_smileys.png

For Windows change the end of line \ to ^ and change \( ... \) to ( ... )

Please always provide your IM version and platform, since syntax may vary.

The Some Stuff is the upper half of 1 image, the white part where the stamps/smileys are on, will be a section for the stamps and in the end result will of course be more integrated in the whole square image.

The smileys are the stamps, it is 1 smiley image (the stamp, which can be a coffee bean/sushi roll or whatever) which will be repeated just like a regular stamp/loyalty in-store card.

We keep track of the amount of stamps a person has and add to/reset to zero accordingly.

The height of the smiley doesn't really matter as long as the stamps (smileys) keep their aspect ratio (and maybe a max width/height to keep huge stamps from showing up on the image).

What is the minimum and maximum number of stamps in an image?

If the maximum is reasonable, eg n=20, a possible approach is to have a lookup table that specifies the number of columns and rows for each n, and how many are to be removed from the last row. Eg for n=14, perhaps we want a grid of 5x3, with one removed.

Then an IM command would tile this number of stamps (including a border around each stamp), and remove the surplus, and resize down to 500x200.

You can montage all the stamp images together (using -geometry +0+0 so the touch) and then use my command above to resize the montaged stamps to the same width as the blue image.

Thanks for the replies. I'll have a go at it this week.

@Fred, we updated to v7 after last year's tips and tricks you provided (you rock!).

snibgo wrote: ↑2019-04-05T14:36:06-07:00 What is the minimum and maximum number of stamps in an image?

If the maximum is reasonable, eg n=20, a possible approach is to have a lookup table that specifies the number of columns and rows for each n, and how many are to be removed from the last row. Eg for n=14, perhaps we want a grid of 5x3, with one removed.

Then an IM command would tile this number of stamps (including a border around each stamp), and remove the surplus, and resize down to 500x200.

That's about right. We don't know the number of stamps an end user would choose though, but it should be safe to pick a certain number for sure.

fmw42 wrote: ↑2019-04-05T15:19:39-07:00 You can montage all the stamp images together (using -geometry +0+0 so the touch) and then use my command above to resize the montaged stamps to the same width as the blue image.

I guess it is safe to assume I can also use a cool -rotate [php]rand(0,360)[/php] command in there to give them a little "hand stamped" feeling, unless they are all created in one go.

I've been checking out your montage idea, I have a question about that.

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montage smiley[1-7].png -tile x3 -geometry +1+1  loyalycard.jpg

^^ That code for example, it could work for me, as it will always use 3 rows. I can play around with that, but here the [1,x] reference the array of numbers there as image names, how do i just reapeat the same image X times? A loop would allow me to rotate each onbe, but I assume that won't work with tile as the whole point there is to tile them together by calculating how many there are.

Last but not least, here's a more accurate picture of a 'real' idea of where stamps would eventually go. Just a quick demo but it makes a better sample of why not just append the stamps under a header image.

kimmyk wrote:how do i just reapeat the same image X times? ... I can also use a cool -rotate

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magick rose: -bordercolor None -border 10 -duplicate 9 -background None -rotate %[fx:rand*10-5] +append out.png

snibgo wrote: ↑2019-04-06T05:53:19-07:00
kimmyk wrote:how do i just reapeat the same image X times? ... I can also use a cool -rotate
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magick rose: -bordercolor None -border 10 -duplicate 9 -background None -rotate %[fx:rand*10-5] +append out.png

That looks like a plan

Although it leaves out the tile feature now.

Okay, I finally got it exactly as I need it.

Just 2 more questions of minor importance.

I have two command working, and I merge the stamps from cmd1 into the image with cmd2.

These are just some variables I will use later:

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$input         = "loyalty-card-lips.png";
$stamps        = "stamp.png";
$points        = 21 - 1;
$output_stamps = "your_stamps.png";
$output        = "loyalycard.png";
$gravity       = "South";

This is the First cmd which create the stamps:

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"/usr/bin/magick montage " . $stamps . " -bordercolor None -border 2 -duplicate " . $points . " -tile 5x  -background None -geometry +15+1 " . $output_stamps;

This is the second cmd which adds the stamps onto my image:

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"/usr/bin/magick " . $input . " -resize 500 \( " . $output_stamps . " -resize x240 -bordercolor none -alpha set -background none -rotate -1 \)  -gravity " . $gravity . " -geometry -0-0 -composite -quality 50 " . $output;

The questions left open are:
1. The rotate command posted above did not work for me. Is there any other way to display the stamps somewhat random, a bit offset and rotated, like it was really stamped manually?
2. I tried to combine the two command into 1, but i failed with the several variations. Is there a way that also is better for the resources, or is this best pactice as is?

Here's some of my final samples for 5, 12 and 21 stamps. I'll add some logic to the mix later so when there are many stamps (or very little) the tiles are increased or decreased.

Thanks for the help Fred and snibgo.

Your "-resize -1" does work, as we can see. Change this to "resize -10" to make it more obvious.

But that rotates the group. To rotate the individual stamps, you need to put that in the montage. Unfortunately, that can't take a "%[fx:...]" expression.

This works:

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magick montage rose: -border 5 -duplicate 4 -rotate -10 x.png

But this fails:

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magick montage rose: -border 5 -duplicate 4 -rotate %[fx:rand*10-5] x.png

montage: invalid argument for option '-rotate': %[fx:rand*10-5] @ error/montage.c/MontageImageCommand/1400.

Perhaps montage can be enhanced to allow this.

You can use magick to rotate the image randomly and then pipe to magick montage. Here I alternate the rotation direction for each copy.

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magick rose: -duplicate 4 -background none -rotate "%[fx:sign(mod(t,2)-1)*30*rand()]" miff:- | magick montage - -tile 3x -geometry +5+5 -background none result.png

Legacy ImageMagick Discussions Archive

Is it possible to calculate width and paste min/max images in a row/column?

Is it possible to calculate width and paste min/max images in a row/column?

Re: Is it possible to calculate width and paste min/max images in a row/column?

Re: Is it possible to calculate width and paste min/max images in a row/column?

Re: Is it possible to calculate width and paste min/max images in a row/column?

Re: Is it possible to calculate width and paste min/max images in a row/column?

Re: Is it possible to calculate width and paste min/max images in a row/column?

Re: Is it possible to calculate width and paste min/max images in a row/column?

Re: Is it possible to calculate width and paste min/max images in a row/column?

Re: Is it possible to calculate width and paste min/max images in a row/column?

Re: Is it possible to calculate width and paste min/max images in a row/column?

Re: Is it possible to calculate width and paste min/max images in a row/column?

Re: Is it possible to calculate width and paste min/max images in a row/column?

Re: Is it possible to calculate width and paste min/max images in a row/column?

Re: Is it possible to calculate width and paste min/max images in a row/column?

Re: Is it possible to calculate width and paste min/max images in a row/column?