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  Tutorial: PHP GD image negative Color

PHP GD image negative Color


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This example shows how to set the negative color of an image in php gd.

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PHP GD image negative Color

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PHP GD image negative Color

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PHP GD image negative Color
<?php function negate($image) { if(function_exists('imagefilter... = imagecolorat($image, $x, $y); $rgb = imagecolorsforindex($index); $color...($image)) { echo 'Image successfully converted to negative colors.'; imagejpeg
 
PHP GD Replace Color
<?php $image = "images.jpg"; $data = getimagesize($image... = imagecreatefromJPEG($image); $color = imagecolorallocate($im,hexdec(substr($hex,0,2...,$cloneH, $oldhex) ) imagesetpixel($im, $x, $cloneH, $color); } }  
 
php gd background color
<?php header("Content-type: image/png"); $width = 350; $height = 360; $im = ImageCreateTrueColor($width, $height); $red = ImageColorAllocate($im, 255, 0, 0); ImageFillToBorder($im, 0, 0, $red, $red
 
PHP GD Colorization of image
<?php $im = imagecreatefromjpeg('images.jpg'); if($im && imagefilter($im, IMG_FILTER_COLORIZE, 0, 255, 0)) { echo 'Image successfully shaded green.'; imagejpeg($im, 'images.jpg'); imagedestroy($im); } else
 
PHP GD image to text
<?php $file = imagecreatefromjpeg("image1.jpg"); $bw = 0...); } $image = imagecreatetruecolor($full_x, $full_y); imagecopyresized($image, $file, 0, 0, 0, 0, imagesx($image), imagesy($image), imagesx($file
 
PHP GD set image title
<?php $zend = imagecreatefromjpeg('images.jpg'); $im = imagecreatetruecolor(200, 200); imagesettile($im, $zend); imagefilledrectangle($im, 0, 0, 199, 199, IMG_COLOR_TILED); header('Content-Type: image/jpeg'); imagejpeg
 
PHP GD Color Transparency Using Alpha Blending
<?php define("WIDTH", 300); define("HEIGHT", 300); $img = imagecreatetruecolor(WIDTH, HEIGHT); $black = imagecolorallocate...;Content-Type: image/png"); imagepng($img); ?> After running
 
PHP GD Captcha Refersh
']; $y = $_POST['submit_y']; $rgb = imagecolorat($captcha_image, $x, $y); $color_tran = imagecolorsforindex($captcha_image, $rgb); $captcha_ok = ($color... = imagecreate($width, $height) or die('Cannot initialize new GD image stream
 
PHP GD captcha
initialize new GD image stream'); $background_color = imagecolorallocate($image, 255, 255, 255); $text_color = imagecolorallocate($image, 20, 40, 100); $noise_color = imagecolorallocate($image, 100, 120, 180); for( $i=0; $i<
 
PHP GD font size
<?php header ("Content-type: image/png"); $handle = ImageCreate (130, 50) or die ("Cannot Create image"); $bg_color = ImageColorAllocate ($handle, 255, 0, 0); $txt_color = ImageColorAllocate
 
PHP GD rotate image
<?php $image = 'images.jpg'; $degrees = 180; header('Content-type: image/jpeg') ; $source = imagecreatefromjpeg($image) ; $rotate = imagerotate($source, $degrees, 0) ; imagejpeg($rotate) ; ?> After running
 
PHP GD watermark an Image
<?php ini_set("display_errors", "1"); error_reporting(E_ALL); $image_src = 'images.jpg'; $watermark_src = 'watermark.jpg'; $opacity = 30; $padding = 20; $image = imagecreatefromjpeg($image_src
 
PHP GD Gradient Fill
<?php $image = ImageCreate(200, 200); for($i=0; $i<255; $i++) { $background_color = ImageColorAllocate($image, $i, $i, $i); } $text_color = ImageColorAllocate($image, 255, 255, 255); $tekst = "
 
PHP GD image convolution
<?php $image = imagecreatefromjpeg('images.jpg'); $emboss = array(array(2, 0, 0), array(0, -1, 0), array(0, 0, -1)); imageconvolution($image, $emboss, 1, 127); header('Content-Type: image/jpeg'); imagejpeg($image
 
PHP GD crop image
<?php $src = imagecreatefromjpeg('image1.jpg'); $dest = imagecreatetruecolor(80, 40); imagecopy($dest, $src, 0, 0, 20, 13, 80, 40); header('Content-Type: image/jpeg'); imagegif($dest); imagedestroy($dest
 
PHP GD fill image
<?php $im = imagecreatetruecolor(55, 30); $white...); imagejpeg($im, 'imagefilledrectangle.jpg'); echo("Image filled... running the program you will get the following output output: Image filled
 
PHP GD Add Border to image
<?php $im = imagecreate(200, 60); $bg = imagecolorallocate($im... = imagecolorallocate($im, 255, 255, 20); //Define border color Yellow $x = 0...,$y+$h,$bordercolors); header("Content-type: image/png"); imagepng
 
PHP GD image set pixel
<?php $x = 200; $y = 200; $gd = imagecreatetruecolor($x, $y...']) / 2; } header('Content-Type: image/png'); imagepng($gd); ?> After...; 190); $red = imagecolorallocate($gd, 255, 255, 255); for ($i = 0; $i
 
PHP GD image filter
<?php $logo1 = imagecreatefromjpeg('images.jpg'); $logo2 = imagecreatefromjpeg('images.jpg'); $output = imagecreatetruecolor(imagesx($logo1) * 2...); imagedestroy($logo1); imagedestroy($logo2); header('Content-Type: image/jpeg
 
PHP GD imagesetbrush() Function
); imagefilledrectangle($im, 0, 0, 299, 99, $white); imagesetbrush($im, $php); imageline($im, 50, 50, 50, 60, IMG_COLOR_BRUSHED); header('Content-type: image/jpeg... <?php $php = imagecreatefromjpeg('im.jpg'); $im
 
PHP GD draw line
<?php header ("Content-type: image/jpeg"); $handle = ImageCreate (130, 50) or die ("Cannot Create image"); $bg_color = ImageColorAllocate ($handle, 255, 0, 0); $txt_color = ImageColorAllocate
 
PHP GD Hue an Image
<?php $im = imagecreatefromJPEG('images.jpg'); echo 'Hue white& black:' . imagecolorclosesthwb($im, 116, 115, 152); imagedestroy($im); ?> After running the program you will get the following output OUTPUT:Hue
 
PHP GD add text to image
PHP GD Add Text to Image Example <?php header ("Content-type: image/jpeg"); $string = "This is my text"; $font = 4; $width = imagefontwidth($font) * strlen($string) ; $height = imagefontheight
 
PHP GD Image Resize
<?php $file = 'images.jpg'; $save = 'new.jpg'; list($width... = imagecreatetruecolor($modwidth, $modheight) ; $image = imagecreatefromjpeg($file) ; imagecopyresampled($tn, $image, 0, 0, 0, 0, $modwidth, $modheight
 
PHP GD copy of image
<?php $src = imagecreatefromjpeg('images.jpg'); $dest = imagecreatetruecolor(80, 40); imagecopy($dest, $src, 0, 0, 20, 13, 80, 40); header('Content-Type: image/jpeg'); imagejpeg($dest); imagedestroy($dest
 
PHP GD flip image
<?php $image = imagecreatefromjpeg("images.jpg"); $image = flip($image,1,1); header("Content-type: image/jpeg"); imagejpeg($image); imagedestroy($image); function flip($i,$h=1,$v=0) { $width = imagesx
 
PHP GD image grayscale
<?php $source_file = "images.jpg"; $im...*$imgh)) { echo "The image is grayscale."; } else { echo "The image is NOT grayscale."; } ?> After running the program you
 
PHP GD text on image
<?php header("Content-Type: image/jpeg"); $im = ImageCreateFromjpeg("images.jpg"); $black = ImageColorAllocate($im, 255, 255, 255); $start_x = 10; $start_y = 20; Imagettftext($im, 12, 0, $start
 
About PHP GD
What is PHP GD Library GD: The GD graphics library is a developed by Thomas..., PHP, Tcl, Lua, REXX, Ruby etc.  The GD library is used to create dynamic image creation. GD is an open source code library and written in 'C
 
PHP GD Merge Image
<?php $backgroundSource = "merge.jpg"; $feedBurnerStatsSource = "images.jpg"; $outputImage = imagecreatefromjpeg...,$feedBurnerStatsX,$feedBurnerStatsY,100); header('Content-type: image/jpeg
 
PHP GD image gamma correct
<?php $im = imagecreatefromjpeg('im.jpg'); imagegammacorrect($im, 1.0, 1.537); imagejpeg($im, 'php_gamma_corrected.jpeg'); echo("Image corrected and saved successfully."); imagedestroy($im); ?> After
 
PHP GD Set image brightness
<?php $im = imagecreatefromjpeg('brightness.jpg');   if($im && imagefilter($im, IMG_FILTER_BRIGHTNESS, 100)) { echo 'Image...); } else { echo 'Image brightness change failed.'; } ?> After
 
PHP GD filters
<?php try{ if(!$image=imagecreatefromjpeg('images.jpg')){ throw new Exception('Error creating image'); } if(!imagefilter($image,IMG_FILTER...("Content-type: image/jpeg"); imagejpeg($image); imagedestroy($image
 
PHP GD get image dimensions
<?php if($img = @GetImageSize("images.jpg")) { echo "image exists , here is some info<br>"; echo "width = $img... { echo"image does not exist"; } ?> After running
 
PHP GD add text to image
PHP GD  Add text to Images <?php $im = imagecreatetruecolor(300, 300); $w = imagesx($im); $h = imagesy($im); $text...: image/gif'); imagegif($im); imagedestroy ($text); imagedestroy($im); ?>
 
PHP GD brush style coloring
<?php define("WIDTH", 200); define("HEIGHT", 200..., HEIGHT-1, IMG_COLOR_STYLED); imageline($img, 0, HEIGHT-1, WIDTH-1, 0, IMG_COLOR..., HEIGHT-31, IMG_COLOR_STYLED); imagerectangle($img, 50, 50, WIDTH-51
 
PHP GD Library, PHP GD Tutorial
The PHP GD Library is one of the most used image-processing libraries used..., resize, crop image on the fly. In this section you will learn PHP GD Library in detail. Let?s get start with the PHP GD Library
 
PHP GD image Character up
<?php $im = imagecreate(120, 120); $string = 'This is the text.'; $bg = imagecolorallocate($im, 255, 0, 0); $black = imagecolorallocate...('Content-type: image/png'); imagepng($im); ?> After running the program you
 
PHP GD tilled filled colors
<?php define("WIDTH", 200); define("HEIGHT", 200...); imagefilledrectangle($img, 1, 1, WIDTH-2, HEIGHT-2, IMG_COLOR_TILED); header("Content-Type: image/png"); imagepng($img); ?> After
 
PHP GD Image into black and white
<?php $i = new imagethumbnail_blackandwhite(); $i->open("...-type: image/jpeg;"); $i->imagejpeg(); class imagethumbnail { var $filename; var $x; var $y; var $image; var $thumbnail; function
 
PHP GD Grayscale
<?php $file = 'images.jpg'; header('Content-type: image/jpeg'); list($width, $height) = getimagesize($file); $source = imagecreatefromjpeg($file); $bwimage= imagecreate($width, $height); for ($c=0;$c<256;$c
 
About PHP GD Arc
PHP GD arc Function <?php $img = imagecreate(200, 200); $red = imagecolorallocate($img, 255, 0, 0); $black = imagecolorallocate($img, 0, 0, 0); ...: image/png"); imagepng($img); imagedestroy($img); ?> After running
 
php gd image create from string
<?php $String = 'iVBORw0KGgoAAAANSUhEUgAAABwAAAASCAMAAAB/2U7WAAAABl...' . '8a5HSE35Q3eO2XP1A1wQkZSgETvDtKdQAAAABJRU5ErkJggg=='; $String = base64_decode($String); $image = imagecreatefromstring($String); if ($image !== false) { header('Content-Type: image/png
 
PHP GD imagecopyresampled
<?php $filename = 'image1.jpg'; $percent = 0.2; header('Content-type: image/jpeg'); list($width, $height) = getimagesize($filename); $new_width = $width * $percent; $new_height = $height * $percent; $image_p
 
PHP GD watermark on Images
<?php $main_img = "main.jpg"; $watermark_img = "RI... = imagecreatefromjpeg($watermark_img); $image = imagecreatefromjpeg($main_img); if(!$image || !$watermark) die("Error: main image or watermark could not be loaded
 
PHP GD center text
<?php $width = 400; $height = 100; $im = ImageCreate($width... - 1, $border); $text = 'This is the text which is center of image...(($height - $text_height) / 2); $image_string = ImageString($im, $font
 
PHP GD gif
<?php function LoadGif($imgname) { $im = @imagecreatefromgif($imgname); if(!$im) { $im = imagecreatetruecolor (150, 30); $bgc...: image/gif'); $img = LoadGif('Roseindia'); imagegif($img); imagedestroy($img
 
PHP GD transparent png
<?php $im = imagecreatetruecolor(55, 30); $red = imagecolorallocate($im, 255, 0, 0); $black = imagecolorallocate($im, 0, 0, 0...;Transparent image created and saved successfully."); ?> After
 
PHP GD random bar chart on image
<?php Header( "Content-type: image/jpeg"); $im = imagecreatefromjpeg( "images.jpg"); $red=ImageColorAllocate($im,255,0,0); $green=ImageColorAllocate($im,0,255,0); $blue=ImageColorAllocate($im,0,0,255
 
PHP GD bold text
<?php header('Content-type: image/png'); $image = imagecreatetruecolor(400, 30); $red = imagecolorallocate($image, 255, 0, 0); $grey = imagecolorallocate($image, 128, 128, 128); $black = imagecolorallocate($image
 
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