gd

Ok, basically I want all images to be 170x170px squares. Thus if an image is not a square i want it to be resized, and then cropped in the middle.. I have spent numerous hours playing with this and I am getting nowhere.. I have gotten it to crop a section of the bigger image etc, but i specifically need the image to be resized, then cropped.. Any help would be greatly appreciated. // get image size of img $x = @getimagesize($img); // image width $sw = $x[0]; // image height $sh = $x[1]; if($sw > $sh) // Horizontal Rectangle? { $newwidth = ($sw/$sh)*170; $newheight=170; $x_pos = ($sw - $sh) / 2

I am creating an image form font size, font family, font color in php. Everything was working fine until I got a new requirement. I was using ttf files and passing the path of particular ttf file in imagettftext function as a parameter. Now I am using google fonts and I am not getting an idea how to get the font in my function. I tried using couple of things such as passing 1.http://fonts.googleapis.com/css?family=Tangerine<br/> 2.http://themes.googleusercontent.com/static/fonts/abel/v3/RpUKfqNxoyNe_ka23bzQ2A.ttf But not getting any thing. first download the ttf file $font = file_get_contents(

I have to detect 'star' like shape in a image with php.Also the star is not fixed and may be at other position next time.I cannot use any external software or library.I have tried all methods like edge detection and grayscaling but all in vain.this is the image: the main problem is I cannot clear the background. if image background is cleared than i can read all pixels color row wise as well as column wise and detect.please help me.this is the image after brightness_filter and edge detection. For this particular image would suggest to perform a low amount of lowpass filtering (Gaussian blur)

The PHP code below generates text as a dynamically created image, how would I be able to get the image to only be as large as the text? Thanks. <?php header('Content-Type: image/jpeg'); $text='Test'; $img = imageCreate(200,200); imagecolorallocate($img, 255, 255, 255); $textColor = imagecolorallocate($img, 0, 0, 0); imagefttext($img, 15, 0, 0, 55, $textColor, 'bgtbt.ttf', $text); imagejpeg($img); imagedestroy($img); ?> UPDATE 1: I found the answer here with the example of the original poster - Creating IMage from Text in PHP - how can I make multiline? UPDATE 2: Martin Geisler's version also

I want to loop through all the pixels of an image, find the rgba value of that pixel, and do something with those pixels. Example Say I have an image that's 100x100 pixels. I want to find the value of each one of those pixels with the function I already made: function getPixel($image, $x, $y) { $colors = imagecolorsforindex($image, imagecolorat($image, $x, $y)); $inrgba = 'rgba(' . $colors['red'] . ',' . $colors['green'] . ',' . $colors['blue'] . ',' . $colors['alpha'] . ')'; return $inrgba; } And store those values, along with the dimensions of the image, in an array, or an array of arrays. I

How can I apply a perspective transformation on an image using only the PHP GD library? I don't want to use a function someone else made I want to UNDERSTAND what's going on I honestly don't know how to describe mathematically a perspective distortion. You could try searching the literature for that (e.g. Google Scholar ). See also in the OpenGL documentation, glFrustum . EDIT : Interestingly, starting with version 8, Mathematica has a ImagePerspectiveTransformation . In the relevant part, it says: For a 3*3 matrix m , ImagePerspectiveTransformation[image,m] applies LinearFractionalTransform[m