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Merging pictures using PHP and GD



I wanted, regrettably, to fade (tear) one picture into another - a train at Melksham into a picture of a disused railway trackbed. We have one of those nearby at Seend, where the Trowbridge - Devizes - Reading - London train service used to run. Here's another 2 options I looked at:



and



The GD library in PHP provides a number of useful graphics and manipulation commands - can you believe that the images above are generated by programs that are 17 lines / 400 bytes long! See fade source code and tear source code and xtipple xource code
(written 2006-01-13, updated 2006-06-09)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
G912 - Well House Consultants - Photography for the Web
  [3402] That spec is a kingfisher ... - (2011-08-21)
  [3170] How far is something pictured from the camera? - (2011-02-15)
  [3104] Catering in Syracuse, the Saigon Cafe, stolen images and Christmas - (2010-12-25)
  [2884] Hotlinked images onto adult material sites - (2010-07-23)
  [2592] Re-using our pictures - (2010-01-21)
  [2252] Leaping dog, Leaping horse, copyright of old masters - (2009-06-20)
  [2224] Trowbridge - a missed opportunity? Melksham - into the breach? - (2009-06-08)
  [1895] Comparison - with and without flash - (2008-11-20)
  [1732] Old pictures and comparisons - (2008-08-01)
  [1568] What colour is the season? - (2008-03-08)
  [1506] Ongoing Image Copyright Issues, PHP and MySQL solutions - (2008-01-14)
  [1396] Using PHP to upload images / Store on MySQL database - security questions - (2007-10-19)
  [1194] Drawing hands on a clock face - PHP - (2007-05-19)
  [1188] What shape is your shake? - (2007-05-15)
  [1185] Themes for the web site - (2007-05-13)
  [1114] PHP Image upload script - (2007-03-21)
  [1087] Telling a story in different ways - (2007-02-20)
  [937] Display an image from a MySQL database in a web page via PHP - (2006-11-22)
  [819] My projector has a photo-id - (2006-07-31)
  [665] PHP Image viewing application - (2006-04-01)
  [553] Keep that image small - (2006-01-03)
  [546] The relevance of the hairy woodpecker - (2005-12-28)
  [194] Published Photographer - (2005-01-30)
  [97] What makes a professional photographer? - (2004-10-23)

H115 - Designing PHP-Based Solutions: Best Practice
  [4118] We not only teach PHP and Python - we teach good PHP and Python Practice! - (2013-06-18)
  [4069] Even early on, separate out your program from your HTML! - (2013-04-25)
  [3926] Filtering PHP form inputs - three ways, but which should you use? - (2012-11-18)
  [3820] PHP sessions - a best practice teaching example - (2012-07-27)
  [3813] Injection Attacks - PHP, SQL, HTML, Javascript - and how to neutralise them - (2012-07-22)
  [3539] Separating program and artwork in PHP - easier maintainance, and better for the user - (2011-12-05)
  [2679] How to build a test harness into your PHP - (2010-03-16)
  [2430] Not just a PHP program - a good web application - (2009-09-29)
  [2221] Adding a newsfeed for your users to a multipage PHP application - (2009-06-06)
  [2199] Improving the structure of your early PHP programs - (2009-05-25)
  [1794] Refactoring - a PHP demo becomes a production page - (2008-09-12)
  [1694] Defensive coding techniques in PHP? - (2008-07-02)
  [1623] PHP Techniques - a workshop - (2008-04-26)
  [1533] Short and sweet and sticky - PHP form input - (2008-02-06)
  [1490] Software to record day to day events and keep an action list - (2007-12-31)
  [1487] Efficient PHP applications - framework and example - (2007-12-28)
  [1482] A story about benchmarking PHP - (2007-12-23)
  [1391] Ordnance Survey Grid Reference to Latitude / Longitude - (2007-10-14)
  [1390] Converting from postal address to latitude / longitude - (2007-10-13)
  [1389] Controlling and labelling Google maps via PHP - (2007-10-13)
  [1381] Using a MySQL database to control mod_rewrite via PHP - (2007-10-06)
  [1323] Easy handling of errors in PHP - (2007-08-27)
  [1321] Resetting session based tests in PHP - (2007-08-26)
  [1182] Painting a masterpiece in PHP - (2007-05-10)
  [1181] Good Programming practise - where to initialise variables - (2007-05-09)
  [1166] Back button - ensuring order are not submitted twice (PHP) - (2007-04-28)
  [1052] Learning to write secure, maintainable PHP - (2007-01-25)
  [1047] Maintainable code - some positive advice - (2007-01-21)
  [945] Code quality counts - (2006-11-26)
  [936] Global, Superglobal, Session variables - scope and persistance in PHP - (2006-11-21)
  [896] PHP - good coding practise and sticky radio buttons - (2006-10-17)
  [839] Reporting on the 10 largest files or 10 top scores - (2006-08-20)
  [572] Giving the researcher power over database analysis - (2006-01-22)
  [426] Robust checking of data entered by users - (2005-08-27)
  [394] A year on - should we offer certified PHP courses - (2005-07-28)
  [340] Code and code maintainance efficiency - (2005-06-08)
  [261] Putting a form online - (2005-03-29)
  [237] Crossfertilisation, PHP to Python - (2005-03-06)
  [123] Short underground journeys and a PHP book - (2004-11-19)

H309 - PHP - Maps, Graphics and Geographics
  [4178] Where are you? How to write a geosensitive application - (2013-09-18)
  [3817] Fpdf - generating .pdf documents easily from your PHP program - (2012-07-24)
  [3734] QR codes with marketing logos embedded - (2012-05-16)
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  [3536] UK Mapping Data - and more to come - under government Open Data measures - (2011-12-03)
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  [3211] Computer Graphics in PHP - World (incoming data) to Pixel (screen) conversion - (2011-03-24)
  [3197] Finding and diverting image requests from rogue domains - (2011-03-08)
  [3133] An image from a website that occasionally comes out as hyroglyphics - (2011-01-14)
  [3027] Server logs - drawing a graph of gathered data - (2010-11-03)
  [2939] Protecting your images from use out of context - (2010-08-29)
  [2729] Uploading a document or image to its own URL via a browser - (2010-04-18)
  [2675] Redirecting to your main domain for correct security keys - (2010-03-13)
  [2583] Reducing image size on digital photos - PHP - (2010-01-17)
  [2390] Dynamic / changing images on your web page - (2009-09-01)
  [2361] Geocoding - converting address to latitude / Longitude with PHP via Google - (2009-08-14)
  [2343] World Flags in your PHP pages - (2009-08-10)
  [1956] Images for Christmas - (2008-12-21)
  [1923] Making it all worthwhile - (2008-12-04)
  [1756] Ever had One of THOSE mornings? - (2008-08-16)
  [1752] Dynamic maps / geographics in PHP - (2008-08-13)
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  [1724] addslashes v mysql_real_escape_string in PHP - (2008-07-27)
  [1628] Gant charts - drawing them with a PHP script - (2008-05-03)
  [1104] Drawing dynamic graphs in PHP - (2007-03-09)
  [320] Ordnance Survey - using a 'Get a map' - (2005-05-22)

H999 - Additional PHP Material
  [3210] Catchable fatal error in PHP ... How to catch, and alternative solutions such as JSON - (2011-03-22)
  [3118] Arrays of arrays - or 2D arrays. How to program tables. - (2011-01-02)
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  [2215] If nothing, make it nothing. - (2009-06-02)
  [2073] Extra PHP Examples - (2009-03-09)
  [1519] Flipping images on your web page - (2008-01-26)
  [1505] Script to present commonly used images - PHP - (2008-01-13)
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  [1451] More PHP sample and demonstration programs - (2007-12-01)
  [1270] PHP Standalone - keyboard to screen - (2007-07-18)
  [1053] Sorting people by name in PHP - (2007-01-26)
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  [917] Syntax checking in PHP - (2006-11-07)
  [822] PHP - a team member leaves - (2006-08-04)
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  [789] Hot answers in PHP - (2006-07-02)
  [687] Presentation, Business and Persistence layers in Perl and PHP - (2006-04-17)
  [603] PHP - setting sort order with an associative array - (2006-02-13)
  [493] Running a Perl script within a PHP page - (2005-11-12)
  [483] Double Dollars in PHP - (2005-11-02)
  [468] Stand alone PHP programs - (2005-10-18)
  [372] Time calculation in PHP - (2005-07-08)
  [337] the array returned by preg_match_all - (2005-06-06)
  [322] More maps - (2005-05-23)
  [239] What and why for the epoch - (2005-03-08)
  [54] PHP and natural sorting - (2004-09-19)


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May all your screw-ups be big ones
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