gd

What I am trying to accomplish in PHP with GD or ImageMagick is the following: I have one large image (say 2000 x 2000 pixels).. I would like to check if a second, smaller image (say 50 x 50 pixels) appears somewhere inside the larger picture, and to what percentage the area is a match.. So, for example, there's a 95% match of the smaller image at that place in the larger image.. Is this possible? How could this be achieved? Thanks!!!! I had a quick look in PHP's ImageMagick and GD and neither has a built in way of doing that. An approach could be to use ImageMagick to divide the larger image

Current background is black. How to change the color to be white? #assuming the mime type is correct switch ($imgtype) { case 'image/jpeg': $source = imagecreatefromjpeg($source_image); break; case 'image/gif': $source = imagecreatefromgif($source_image); break; case 'image/png': $source = imagecreatefrompng($source_image); break; default: die('Invalid image type.'); } #Figure out the dimensions of the image and the dimensions of the desired thumbnail $src_w = imagesx($source); $src_h = imagesy($source); #Do some math to figure out which way we'll need to crop the image #to get it proportional

When using the function imagepng() in PHP, how can I make sure the images that I save are saved with a transparent background? Eric Here is an example of the imagecolortransparent function (if it helps): <?php // Create a 55x30 image $im = imagecreatetruecolor(55, 30); $red = imagecolorallocate($im, 255, 0, 0); $black = imagecolorallocate($im, 0, 0, 0); // Make the background transparent imagecolortransparent($im, $black); // Draw a red rectangle imagefilledrectangle($im, 4, 4, 50, 25, $red); // Save the image imagepng($im, './imagecolortransparent.png'); imagedestroy($im); ?> Simply do this:

I am using a script that lets users upload images. The script resizes and converts the images to JPEG. The problem I have is when a PNG with transparency is uploaded, the resulting JPEG image is black where there was transparency. How can I edit the below script to replace the black with white? It already does this for GIF's but not for PNG's. // RESIZE IMAGE AND PUT IN USER DIRECTORY switch($this->file_ext) { case "gif": $file = imagecreatetruecolor($width, $height); $new = imagecreatefromgif($this->file_tempname); $kek=imagecolorallocate($file, 255, 255, 255); imagefill($file,0,0,$kek);

I have no idea how to resize image in PHP, my code is: for ($index = 1; $index <= 2; $index++) { if (!empty($_FILES["pic$index"]["name"])) { $ext = substr($_FILES["pic$index"]["name"], strrpos($_FILES["pic$index"]["name"], '.') + 1); $dir = "../gallery/$mkdir"; HERE I NEED THE RESIZE OF THE TMP FILE OF IMAGE move_uploaded_file($_FILES["pic$index"]["tmp_name"] , "$dir/img-$index.$ext"); } } $mkdir = the name of the gallery's folder (there are many galleries). $dir = where the pics will be placed. $ext = the type of the image (png, gif or jpg). foreach loop runs two times because you can upload

I'm trying to figure out why I can't get the GD perl module to install on my Debian 7 server. Here is how I installed the core stuff: sudo apt-get install libgd-gd2-perl Then running the -MCPAN to install, I get: root@myserver:~# sudo perl -MCPAN -e 'install GD' Going to read '/root/.cpan/Metadata' Database was generated on Sun, 19 Jul 2015 21:41:02 GMT Running install for module 'GD' Running make for L/LD/LDS/GD-2.56.tar.gz Checksum for /root/.cpan/sources/authors/id/L/LD/LDS/GD-2.56.tar.gz ok CPAN.pm: Going to build L/LD/LDS/GD-2.56.tar.gz Configuring for libgd version 2.0.36. Checking for