Overlaying image with text and aut. adj. text size

[spilker]

Hello,

i want to overlay images of any size with an overlay text like "Restricted". The width of the overlay text should match the width of the original image (and the height choosen automatically). I need to this with one call to convert. I was now experimenting some hours with this problem with no results. The problem is the "one call to convert". This is mandatory as conversion takes part of the EMC Documentum Media transformation server (which includes ImageMagick as plugin). Only the commandline to the convert call is configurable. I can´t do any piping or similar.

Greetings, Joerg

[fmw42]

try either



ww=`convert zelda3.jpg -format "%w" info:`
convert zelda3.png \( -background none -size ${ww}x -fill black \
-font Helvetica label:"restricted" \) \
-gravity north -compose over -composite zelda3_tmp.jpg

or

convert zelda3.png \( -background none -size $(convert zelda3.png -format "%w" info:)x -fill black \
-font Helvetica label:"restricted" \) \
-gravity north -compose over -composite zelda3_tmp2.jpg



This is unix. for windows see http://www.imagemagick.org/Usage/windows/

[spilker]

This is the problem. I can´t break it into two commands or get the size of the original image by an inline convert call. On the MTS host you will not find any convert.exe or composite.exe. There´s only an IMW_ComServer.exe which is running always as a task. The concrete call to transform an image is done by some java server which generates a commandline and passes this commandline to the ComServer. I have to achieve the transformation with a plain call to convert.

I´v thought about drawing two lines (from NW to SE and SW TO NE) on the image (instead of the Restricted text). But from all the line drawing examples, it seems that the -draw command only nows about absolute coordinates.

Anyway what i need is some code to make the image unusuable for publication but people should still be able to recognize what´s represented on the picture.

[Bonzo]

Here is an example you could possibly use based on a previous post in this forum:

Code: Select all

<?php 
exec("convert -size 140x80 xc:none -fill grey -gravity NorthWest \
-draw \"text 10,10 'Copyright'\" -gravity SouthEast \
-draw \"text 5,15 'Copyright'\" miff:- | composite \
-tile - ../original_images/House.jpg tiled_text.jpg");
?> 

You could have the copyright image on your server anyway and just use the composite part ?

[spilker]

It´s still using a pipe so i can´t use it. Everything must be done within a single convert call.

[spilker]

I think this would also fit my needs:

convert original_pic.tif -size 10000x10000 tile:rings.jpg -compose blend -set option:compose:args 20 -composite target_picture.tif