Watermarking with Text.

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Watermarked
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Watermarking with Text.

Post by Watermarked » 2017-12-05T20:29:15-07:00

I have run into a little issue, where I have had absolutely no luck in trying to implement some of the public examples on the ImageMagick website mainly due to not knowing how to format the command within PHP. I took a piece of open source code and tweaked it to fit my needs, the final part is actually configuring the ImageMagick command in order to achieve the desired effect which is;

Image

A repeating watermark slanted in the same direction. Please note that the current command I use is;

Code: Select all

// Build the imagemagick command - using rgba so the opacity of the text can be set
$cmd = "$original_image -pointsize 50 -font /var/www/html/static/fonts/arial.ttf -fill rgba\(0,0,0,0.4\) ".
" -gravity center -annotate +0+0 \"$text_submitted\" ";
$original_image is an unwatermarked image file submitted from a form,
$text_submitted is the text submitted from a form, which of course will output the following;

Image

I am currently using Debian 8 with PHP 5.6.30, here is some information on what version of Imagick I am using;

Image

I have really tried to get this working on my own but I just cannot and would really, really appreciate an experts help on the matter. Thanks in advance.

snibgo
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Re: Watermarking with Text.

Post by snibgo » 2017-12-05T20:38:49-07:00

What command do you actually run? What you have shown has no "convert" at the start, nor an output filename at the end.

What error message do you get?
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Watermarked
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Re: Watermarking with Text.

Post by Watermarked » 2017-12-05T20:44:07-07:00

snibgo wrote:
2017-12-05T20:38:49-07:00
What command do you actually run?

Code: Select all

$cmd = "$original_image -pointsize 50 -font /var/www/html/static/fonts/arial.ttf -fill rgba\(0,0,0,0.4\) ".
" -gravity center -annotate +0+0 \"$text_submitted\" ";
$original_image is an unwatermarked image file submitted from a form.
$text_submitted is the text submitted from a form, which of course will output the following.



snibgo wrote:
2017-12-05T20:38:49-07:00
What you have shown has no "convert" at the start, nor an output filename at the end.
This portion saves the file I believe;

Code: Select all

exec("convert $cmd  $new_image 2>&1", $array);
snibgo wrote:
2017-12-05T20:38:49-07:00
What error message do you get?
I do not get any errors, as it currently stands this is what outputs;

Image

I am wanting to change the magick command to output a similar result to;

Image

Which as described, is a tile/repeating piece of text with left titled orientation.

snibgo
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Re: Watermarking with Text.

Post by snibgo » 2017-12-05T20:50:02-07:00

So, it successfully writes text, as we see on the circular image. Correct?

The colourful rectangular image seems to have no text.
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Watermarked
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Re: Watermarking with Text.

Post by Watermarked » 2017-12-05T20:59:39-07:00

snibgo wrote:
2017-12-05T20:50:02-07:00
So, it successfully writes text, as we see on the circular image. Correct?

The colourful rectangular image seems to have no text.
Im sorry fella, I am explaining this retarded. Let me clear it up, so the command I have posted above in the quotes successfully produces this image;

Image

In the center you can see the text, I have tested this following line;
" -gravity center -annotate +0+0 \"$text_submitted\" ";
Changing it to
" -gravity North -annotate +0+0 \"$text_submitted\" ";
Which correctly moves the text to the top, everything is working fine as per the PHP code. HOWEVER, I am wanting to change the appearance of the text that it overlays onto the image, the colorful image is an EXAMPLE of the type of effect I am wanting;

- Text repeated.
- Text oriented.

I have no idea how I need to format the code for it to do that.

snibgo
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Re: Watermarking with Text.

Post by snibgo » 2017-12-05T21:38:35-07:00

If you want to tile the watermark, then create it as a separate image first, eg (Windows BAT syntax):

Code: Select all

convert ^
  -background None -fill Blue ^
  -pointsize 20 label:snibgo ^
  -rotate -20 +repage ^
  +write mpr:TILE +delete ^
  toes.png -alpha set ^
  ( +clone ^
    -fill mpr:TILE -draw "color 0,0 reset" ^
  ) ^
  -composite ^
  snibtile.jpg
Image
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fmw42
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Re: Watermarking with Text.

Post by fmw42 » 2017-12-05T21:42:24-07:00

This is unix syntax.

Code: Select all

convert sunset_lake.png \
\( -background none -pointsize 24 -fill white label:"TESTING" -rotate 20 -write mpr:tile +delete \) \
\( +clone -tile mpr:tile -draw "color 0,0 reset" \) \
-compose over -composite sunset_lake_tile_text.png
Image


EDIT: Sorry, snibgo. We were posting at the same time. Almost identical approaches, again.

Watermarked
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Re: Watermarking with Text.

Post by Watermarked » 2017-12-05T21:45:51-07:00

Code: Select all

$cmd = " -size 140x80 xc:none -fill grey -gravity NorthWest ".
" -draw \"text 10,10 \"Copyright\" \" -gravity SouthEast ".
" -draw \"text 5,15 \"Copyright\" \" miff:- | composite ".
" -tile - $original_image ";
exec("convert $cmd $new_image", $array);
Image

Just the rotation I need to do, I am using Imagick with PHP I believe.

Watermarked
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Re: Watermarking with Text.

Post by Watermarked » 2017-12-05T22:02:11-07:00

Completed in my case;

Code: Select all

$cmd = " -size 140x80 xc:none -font /var/www/html/static/fonts/OpenSans-Bold.ttf -fill rgba\(0,0,0,0.4\) -gravity NorthWest ".
" -draw \"text 10,10 \"$text_submitted\" \" -gravity SouthEast ".
" -draw \"text 5,15 \"$text_submitted\" \" miff:- | composite ".
" -tile - $original_image ";
I think I can handle this from here, its been a pleasure. Thank you very much for the assistance, your examples cleared my head up. My mistake was, I was trying to add all of these new -draw lines on the same line, instead of on a new line.

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