PHP imageconvolution函数代码示例

 /**
  * sharpen( $factor ) - factor goes from -64 to  64 where -64 is max blur and 64 is max sharpen
  **/
 public function sharpenBlur($factor)
 {
     if ($factor == 0) {
         return $this;
     }
     // get a value thats equal to 64 - abs( factor )
     // ( using min/max to limited the factor to 0 - 64 to not get out of range values )
     $val1Adjustment = 64 - min(64, max(0, abs($factor)));
     // the base factor for the "current" pixel depends on if we are blurring or sharpening.
     // If we are blurring use 1, if sharpening use 9.
     $val1Base = abs($factor) != $factor ? 1 : 9;
     // value for the center/currrent pixel is:
     //  1 + 0 - max blurring
     //  1 + 64- minimal blurring
     //  9 + 64- minimal sharpening
     //  9 + 0 - maximum sharpening
     $val1 = $val1Base + $val1Adjustment;
     // the value for the surrounding pixels is either positive or negative depending on if we are blurring or sharpening.
     $val2 = abs($factor) != $factor ? 1 : -1;
     // setup matrix ..
     $matrix = array(array($val2, $val2, $val2), array($val2, $val1, $val2), array($val2, $val2, $val2));
     // calculate the correct divisor
     // actual divisor is equal to "$divisor = $val1 + $val2 * 8;"
     // but the following line is more generic
     $divisor = array_sum(array_map('array_sum', $matrix));
     // apply the matrix
     imageconvolution($this->image, $matrix, $divisor, 0);
     return $this;
 }

 public static function resize($file_name, $file_type)
 {
     switch ($file_type) {
         // узнаем тип картинки
         case "image/gif":
             $im = imagecreatefromgif($file_name);
             break;
         case "image/jpeg":
             $im = imagecreatefromjpeg($file_name);
             break;
         case "image/png":
             $im = imagecreatefrompng($file_name);
             break;
         case "image/pjpeg":
             $im = imagecreatefromjpeg($file_name);
             break;
     }
     list($w, $h) = getimagesize($file_name);
     // берем высоту и ширину
     $koe = $w / 600;
     // вычисляем коэффициент 600 это ширина которая должна быть
     $new_h = ceil($h / $koe);
     // с помощью коэффициента вычисляем высоту
     $im1 = imagecreatetruecolor(600, $new_h);
     // создаем картинку
     imagecopyresampled($im1, $im, 0, 0, 0, 0, 600, $new_h, imagesx($im), imagesy($im));
     imageconvolution($im1, array(array(-1, -1, -1), array(-1, 16, -1), array(-1, -1, -1)), 8, 0);
     imagejpeg($im1, $file_name, 100);
     // переводим в jpg
     imagedestroy($im);
     imagedestroy($im1);
 }

function image($mot)
{
    $size = 40;
    $marge = 5;
    $box = imagettfbbox($size, 0, 'police/actionj.ttf', $mot);
    $largeur = $box[2] - $box[0];
    $hauteur = $box[1] - $box[7];
    $largeur_lettre = round($largeur / strlen($mot));
    $font = 'police/actionj.ttf';
    // Flou Gaussien
    $matrix_blur = array(array(1, 1, 1), array(1, 1, 1), array(1, 1, 1));
    $img = imagecreate($largeur + $marge * 2, $hauteur + $marge * 2);
    $blanc = imagecolorallocate($img, 255, 255, 255);
    $noir = imagecolorallocate($img, 0, 0, 0);
    $special_couleur = array(imagecolorallocate($img, 30, 140, 130), imagecolorallocate($img, 200, 14, 130), imagecolorallocate($img, 30, 140, 13), imagecolorallocate($img, 0, 140, 208), imagecolorallocate($img, 80, 180, 130), imagecolorallocate($img, 30, 255, 0));
    for ($i = 0; $i < strlen($mot); $i++) {
        $l = $mot[$i];
        $angle = mt_rand(-35, 35);
        //On génère un angle entre -35 et 35 degrés
        //On écrit et on place le texte dans l'image
        imagettftext($img, $size, $angle, $i * $largeur_lettre + $marge, $hauteur + mt_rand(0, $marge / 2), $special_couleur[array_rand($special_couleur)], $font, $l);
    }
    imageline($img, 2, mt_rand(2, $hauteur), $largeur + $marge, mt_rand(2, $hauteur), $noir);
    //On réalise des barres aléatoires
    imageline($img, 2, mt_rand(2, $hauteur), $largeur + $marge, mt_rand(2, $hauteur), $noir);
    imageconvolution($img, $matrix_blur, 9, 0);
    // On applique la matrice, avec un diviseur 9
    imageconvolution($img, $matrix_blur, 9, 0);
    imagepng($img);
    //affiche l'image au format png
    imagedestroy($img);
    //libère toute la mémoire associé à l'image
}

function gaussianBlur($gd, $direction = 90, $speed = 1.0, $bidirectional = TRUE)
{
    $map = array(array(1, 0), array(2, 0), array(2, 1), array(2, 2), array(1, 2), array(0, 2), array(0, 1), array(0, 0));
    // Convert the 360 degree direction to a 0-7 direction index (float)
    $direction %= 360;
    $direction /= 45;
    // Create an empty convolution matrix
    $matrix = array_fill(0, 3, array(0.0, 0.0, 0.0));
    $matrix[1][1] = 1.0;
    // Find the starting index (the counter-clockwise side)
    $index = (int) $direction;
    // Calculate how much of the speed should be passed to the next direction
    $spread = fmod($direction, 1.0);
    // Counter-clockwise side gets the inverse of $spread
    list($x, $y) = $map[$index];
    $matrix[$x][$y] = $speed * (1.0 - $spread);
    if ($bidirectional) {
        // Apply the same 180 degrees opposed
        list($x, $y) = $map[($index + 4) % 8];
        $matrix[$x][$y] = $speed * (1.0 - $spread);
    }
    // Clockwise side gets the rest from $spread
    list($x, $y) = $map[($index + 1) % 8];
    $matrix[$x][$y] = $speed * $spread;
    if ($bidirectional) {
        // Apply the same 180 degrees opposed
        list($x, $y) = $map[($index + 5) % 8];
        $matrix[$x][$y] = $speed * $spread;
    }
    $divisor = array_sum(array_map('array_sum', $matrix));
    imageconvolution($gd, $matrix, $divisor, 0);
    return $gd;
}

function captcha($mot)
{
    $size = 64;
    $marge = 15;
    $font = '../fonts/angelina.ttf';
    $matrix_blur = array(array(1, 1, 1), array(1, 1, 1), array(1, 1, 1));
    $box = imagettfbbox($size, 0, $font, $mot);
    $largeur = $box[2] - $box[0];
    $hauteur = $box[1] - $box[7];
    $largeur_lettre = round($largeur / strlen($mot));
    $img = imagecreate($largeur + $marge, $hauteur + $marge);
    $blanc = imagecolorallocate($img, 255, 255, 255);
    $noir = imagecolorallocate($img, 0, 0, 0);
    $couleur = array(imagecolorallocate($img, 0x99, 0x0, 0x66), imagecolorallocate($img, 0xcc, 0x0, 0x0), imagecolorallocate($img, 0x0, 0x0, 0xcc), imagecolorallocate($img, 0x0, 0x0, 0xcc), imagecolorallocate($img, 0xbb, 0x88, 0x77));
    for ($i = 0; $i < strlen($mot); ++$i) {
        $l = $mot[$i];
        $angle = mt_rand(-35, 35);
        imagettftext($img, mt_rand($size - 7, $size), $angle, $i * $largeur_lettre + $marge, $hauteur + mt_rand(0, $marge / 2), $couleur[array_rand($couleur)], $font, $l);
    }
    imageline($img, 2, mt_rand(2, $hauteur), $largeur + $marge, mt_rand(2, $hauteur), $noir);
    imageline($img, 2, mt_rand(2, $hauteur), $largeur + $marge, mt_rand(2, $hauteur), $noir);
    imageconvolution($img, $matrix_blur, 10, 10);
    imageconvolution($img, $matrix_blur, 10, 0);
    imagepng($img);
    imagedestroy($img);
}

 /**
  * Show the captcha image.
  *
  * @param integer $iRandom
  * @return void
  */
 public function show($iRandom = null)
 {
     if (!empty($iRandom)) {
         $this->_sStr = Various::genRnd($iRandom, 5);
     } else {
         $this->_sStr = Various::genRnd('pH7_Pierre-Henry_Soria_Sanz_González_captcha', 5);
     }
     $this->_oSession->set('rand_code', $this->_sStr);
     $this->_sFont = $this->_getFont();
     //$sBackground = PH7_PATH_DATA . 'background/' . mt_rand(1, 5) . '.png';
     $this->_aBox = imagettfbbox($this->_iSize, 0, $this->_sFont, $this->_sStr);
     $this->_iWidth = $this->_aBox[2] - $this->_aBox[0];
     $this->_iHeight = $this->_aBox[1] - $this->_aBox[7];
     unset($this->_aBox);
     $this->_iStringWidth = round($this->_iWidth / strlen($this->_sStr));
     //$this->_rImg = imagecreatefrompng($sBackground);
     $this->_rImg = imagecreate($this->_iWidth + $this->_iMargin, $this->_iHeight + $this->_iMargin);
     $this->_aColor = array(imagecolorallocate($this->_rImg, 0x99, 0x0, 0x66), imagecolorallocate($this->_rImg, 0xcc, 0x0, 0x0), imagecolorallocate($this->_rImg, 0x0, 0x0, 0xcc), imagecolorallocate($this->_rImg, 0x0, 0x0, 0xcc), imagecolorallocate($this->_rImg, 0xbb, 0x88, 0x77));
     $this->_rBlack = imagecolorallocate($this->_rImg, 0, 0, 0);
     $this->_rRed = imagecolorallocate($this->_rImg, 200, 100, 90);
     $this->_rWhite = imagecolorallocate($this->_rImg, 255, 255, 255);
     imagefilledrectangle($this->_rImg, 0, 0, 399, 99, $this->_rWhite);
     $this->_mixing();
     imageline($this->_rImg, mt_rand(2, $this->_iWidth + $this->_iMargin), mt_rand(1, $this->_iWidth + $this->_iMargin), mt_rand(1, $this->_iHeight + $this->_iMargin), mt_rand(2, $this->_iWidth + $this->_iMargin), $this->_rBlack);
     imageline($this->_rImg, mt_rand(2, $this->_iHeight + $this->_iMargin), mt_rand(1, $this->_iHeight + $this->_iMargin), mt_rand(1, $this->_iWidth + $this->_iMargin), mt_rand(2, $this->_iHeight + $this->_iMargin), $this->_rRed);
     imageline($this->_rImg, mt_rand(2, $this->_iHeight + $this->_iMargin), mt_rand(1, $this->_iWidth + $this->_iMargin), mt_rand(1, $this->_iWidth + $this->_iMargin), mt_rand(2, $this->_iHeight + $this->_iMargin), $this->_aColor[array_rand($this->_aColor)]);
     unset($this->_rBlack, $this->_rRed, $this->_rWhite);
     imageconvolution($this->_rImg, $this->_aMatrixBlur, 9, 0);
     imageconvolution($this->_rImg, $this->_aMatrixBlur, 9, 0);
     unset($this->_aMatrixBlur);
     (new Browser())->noCache();
     header('Content-type: image/png');
     imagepng($this->_rImg);
     imagedestroy($this->_rImg);
 }

 function compress($path, $res)
 {
     $size = getimagesize($path);
     $width = $size[0];
     $height = $size[1];
     $quality = 75;
     $xRatio = $res / $width;
     $yRatio = $res / $height;
     $tnHeight;
     $tnWidth;
     if ($xRatio * $height < $rse) {
         // Resize the image based on width
         $tnHeight = ceil($xRatio * $height);
         $tnWidth = $res;
     } else {
         $tnWidth = ceil($yRatio * $width);
         $tnHeight = $res;
     }
     ini_set('memory_limit', MEMORY_TO_ALLOCATE);
     $dst = imagecreatetruecolor($tnWidth, $tnHeight);
     $src;
     $newfile = dirname($path) . '/' . $res . '/' . $res . '_' . basename($path);
     switch ($size['mime']) {
         case 'image/gif':
             $src = imagecreatefromgif($path);
             $this->setalpha($dst);
             $quality = round(10 - $quality / 10);
             $sharpen = false;
             $createfile = 'imagepng';
             break;
         case 'image/x-png':
         case 'image/png':
             $src = imagecreatefrompng($path);
             $this->setalpha($dst);
             $quality = round(10 - $quality / 10);
             $sharpen = false;
             $createfile = 'imagepng';
             break;
         default:
             $src = imagecreatefromjpeg($path);
             $sharpen = true;
             $createfile = 'imagejpeg';
             break;
     }
     imagecopyresampled($dst, $src, 0, 0, 0, 0, $tnWidth, $tnHeight, $width, $height);
     if ($sharpen) {
         $sharpness = $this->findSharp($width, $tnWidth);
         $sharpenMatrix = array(array(-1, -2, -1), array(-2, $sharpness + 12, -2), array(-1, -2, -1));
         $divisor = $sharpness;
         $offset = 0;
         imageconvolution($dst, $sharpenMatrix, $divisor, $offset);
     }
     if (!file_exists(dirname($path))) {
         mkdir(dirname($path));
     }
     $createfile($dst, $newfile, $quality);
     imagedestroy($src);
     imagedestroy($dst);
 }

 /**
  * Executes imageconvolution() filter.
  *
  * @param WideImage_Image $image
  * @param array           $matrix
  * @param numeric         $div
  * @param numeric         $offset
  *
  * @return WideImage_Image
  */
 public function execute($image, $matrix, $div, $offset)
 {
     $new = $image->asTrueColor();
     if (!imageconvolution($new->getHandle(), $matrix, $div, $offset)) {
         throw new WideImage_GDFunctionResultException('imageconvolution() returned false');
     }
     return $new;
 }

 public function transform(CGImageBase $src)
 {
     // copy the image (pixel for pixel)
     $_dest = new CGImageBase($src);
     imagecopy($_dest['rsrc'], $src['rsrc'], 0, 0, 0, 0, $src['width'], $src['height']);
     imageconvolution($_dest['rsrc'], $this->_matrix, $this->_divisor, 0);
     return $_dest;
 }

 function execute($image, $matrix, $div, $offset)
 {
     $new = $image->asTrueColor();
     if (!imageconvolution($new->getHandle(), $matrix, $div, $offset)) {
         JError::raiseError(500, "imageconvolution() returned false");
     }
     return $new;
 }

 /**
  * {@inheritdoc}
  */
 public function sharpen()
 {
     $sharpenMatrix = array(array(-1, -1, -1), array(-1, 16, -1), array(-1, -1, -1));
     $divisor = array_sum(array_map('array_sum', $sharpenMatrix));
     if (false === imageconvolution($this->resource, $sharpenMatrix, $divisor, 0)) {
         throw new RuntimeException('Failed to sharpen the image');
     }
     return $this;
 }

 private function applySharpening()
 {
     if (!function_exists('imageconvolution')) {
         return;
     }
     if ($this->sharpening !== 1) {
         $this->sharpening = abs(1 - $this->sharpening);
     }
     $matrix = array(array(-1, -1, -1), array(-1, ceil($this->sharpening * 60), -1), array(-1, -1, -1));
     $divisor = array_sum(array_map('array_sum', $matrix));
     imageconvolution($this->finalImage, $matrix, $divisor, 0);
 }

 /**
  * Sharpen image
  *
  * @param  Intervention\Image\Image $image
  * @return boolean
  */
 public function execute($image)
 {
     $amount = $this->argument(0)->between(0, 100)->value(10);
     // build matrix
     $min = $amount >= 10 ? $amount * -0.01 : 0;
     $max = $amount * -0.025;
     $abs = (4 * $min + 4 * $max) * -1 + 1;
     $div = 1;
     $matrix = array(array($min, $max, $min), array($max, $abs, $max), array($min, $max, $min));
     // apply the matrix
     return imageconvolution($image->getCore(), $matrix, $div, 0);
 }

 /**
  * @param Image $image
  *
  * @return Image
  */
 public function apply($image)
 {
     $amount = $this->amount;
     // build matrix
     $min = $amount >= 10 ? $amount * -0.01 : 0;
     $max = $amount * -0.025;
     $abs = (4 * $min + 4 * $max) * -1 + 1;
     $div = 1;
     $matrix = array(array($min, $max, $min), array($max, $abs, $max), array($min, $max, $min));
     // apply the matrix
     imageconvolution($image->getCore(), $matrix, $div, 0);
     return $image;
 }

 /**
  * imageconvolution replacement for when the gd function is missing.
  *
  * @author Chao Xu
  * @param himage $src The image
  * @param array $filter The array
  * @param float $div Filter divisor
  * @param float $offset Filter offset
  */
 static function imageconvolution($src, $filter, $div, $offset)
 {
     if (function_exists('imageconvolution')) {
         return imageconvolution($himage, $m, $div, $offs);
     }
     if ($src == NULL) {
         return 0;
     }
     $sx = imagesx($src);
     $sy = imagesy($src);
     $srcback = ImageCreateTrueColor($sx, $sy);
     ImageCopy($srcback, $src, 0, 0, 0, 0, $sx, $sy);
     if ($srcback == NULL) {
         return 0;
     }
     $pxl = array(1, 1);
     for ($y = 0; $y < $sy; ++$y) {
         for ($x = 0; $x < $sx; ++$x) {
             $new_r = $new_g = $new_b = 0;
             $alpha = imagecolorat($srcback, $pxl[0], $pxl[1]);
             $new_a = $alpha >> 24;
             for ($j = 0; $j < 3; ++$j) {
                 $yv = min(max($y - 1 + $j, 0), $sy - 1);
                 for ($i = 0; $i < 3; ++$i) {
                     $pxl = array(min(max($x - 1 + $i, 0), $sx - 1), $yv);
                     $rgb = imagecolorat($srcback, $pxl[0], $pxl[1]);
                     $new_r += ($rgb >> 16 & 0xff) * $filter[$j][$i];
                     $new_g += ($rgb >> 8 & 0xff) * $filter[$j][$i];
                     $new_b += ($rgb & 0xff) * $filter[$j][$i];
                 }
             }
             $new_r = $new_r / $div + $offset;
             $new_g = $new_g / $div + $offset;
             $new_b = $new_b / $div + $offset;
             $new_r = $new_r > 255 ? 255 : ($new_r < 0 ? 0 : $new_r);
             $new_g = $new_g > 255 ? 255 : ($new_g < 0 ? 0 : $new_g);
             $new_b = $new_b > 255 ? 255 : ($new_b < 0 ? 0 : $new_b);
             $new_pxl = ImageColorAllocateAlpha($src, (int) $new_r, (int) $new_g, (int) $new_b, $new_a);
             if ($new_pxl == -1) {
                 $new_pxl = ImageColorClosestAlpha($src, (int) $new_r, (int) $new_g, (int) $new_b, $new_a);
             }
             if ($y >= 0 && $y < $sy) {
                 imagesetpixel($src, $x, $y, $new_pxl);
             }
         }
     }
     imagedestroy($srcback);
     return 1;
 }