/** * @param Image $image * * @return Image */ public function apply($image) { $size = $this->amount; $width = $image->getWidth(); $height = $image->getHeight(); $image->getCore()->scaleImage(max(1, $width / $size), max(1, $height / $size)); $image->getCore()->scaleImage($width, $height); return $image; }
/** * Crop based on entropy. * * @param Image $oldImage * @param $cropW * @param $cropH * * @return array */ private function _smartCrop($oldImage, $cropW, $cropH) { $image = clone $oldImage; $this->resizeFit($image, 30, 30); $origW = $oldImage->getWidth(); $origH = $oldImage->getHeight(); $resizeW = $image->getWidth(); $resizeH = $image->getHeight(); $smallCropW = round($resizeW / $origW * $cropW); $smallCropH = round($resizeH / $origH * $cropH); $step = 1; for ($y = 0; $y < $resizeH - $smallCropH; $y += $step) { for ($x = 0; $x < $resizeW - $smallCropW; $x += $step) { $hist[$x . '-' . $y] = $this->_entropy($image->histogram(array(array($x, $y), array($smallCropW, $smallCropH)))); } if ($resizeW - $smallCropW <= 0) { $hist['0-' . $y] = $this->_entropy($image->histogram(array(array(0, 0), array($smallCropW, $smallCropH)))); } } if ($resizeH - $smallCropH <= 0) { $hist['0-0'] = $this->_entropy($image->histogram(array(array(0, 0), array($smallCropW, $smallCropH)))); } asort($hist); end($hist); $pos = key($hist); // last key list($x, $y) = explode('-', $pos); $x = round($x * ($origW / $resizeW)); $y = round($y * ($origH / $resizeH)); return array($x, $y); }
/** * Dither by applying a threshold map. * * @param Image $image * * @return Image */ private function ordered($image) { // Localize vars $width = $image->getWidth(); $height = $image->getHeight(); $thresholdMap = array(array(15, 135, 45, 165), array(195, 75, 225, 105), array(60, 180, 30, 150), array(240, 120, 210, 90)); // Loop using image1 $pixelIterator = $image->getCore()->getPixelIterator(); foreach ($pixelIterator as $y => $rows) { /* Loop through pixel rows */ foreach ($rows as $x => $px) { /* Loop through the pixels in the row (columns) */ /** * @var $px \ImagickPixel */ $rgba = $px->getColor(); $gray = round($rgba['r'] * 0.3 + $rgba['g'] * 0.59 + $rgba['b'] * 0.11); $threshold = $thresholdMap[$x % 4][$y % 4]; $oldPixel = ($gray + $threshold) / 2; if ($oldPixel <= 127) { // Determine if black or white. Also has the benefit of clipping excess value $newPixel = 0; } else { $newPixel = 255; } // Current pixel $px->setColor("rgb({$newPixel},{$newPixel},{$newPixel})"); } $pixelIterator->syncIterator(); /* Sync the iterator, this is important to do on each iteration */ } $type = $image->getType(); $file = $image->getImageFile(); $image = $image->getCore(); return new Image($image, $file, $width, $height, $type); // Create new image with updated core }
/** * @param Image $image * * @return Image */ public function apply($image) { $pixels = array(); $finalPx = array(); // Localize vars $width = $image->getWidth(); $height = $image->getHeight(); // Loop $pixelIterator = $image->getCore()->getPixelIterator(); foreach ($pixelIterator as $y => $rows) { /* Loop through pixel rows */ foreach ($rows as $x => $px) { /* Loop through the pixels in the row (columns) */ // row 0 if ($x > 0 and $y > 0) { $matrix[0][0] = $this->getColor($px, $pixels, $x - 1, $y - 1); } else { $matrix[0][0] = $this->getColor($px, $pixels, $x, $y); } if ($y > 0) { $matrix[1][0] = $this->getColor($px, $pixels, $x, $y - 1); } else { $matrix[1][0] = $this->getColor($px, $pixels, $x, $y); } if ($x + 1 < $width and $y > 0) { $matrix[2][0] = $this->getColor($px, $pixels, $x + 1, $y - 1); } else { $matrix[2][0] = $this->getColor($px, $pixels, $x, $y); } // row 1 if ($x > 0) { $matrix[0][1] = $this->getColor($px, $pixels, $x - 1, $y); } else { $matrix[0][1] = $this->getColor($px, $pixels, $x, $y); } if ($x + 1 < $width) { $matrix[2][1] = $this->getColor($px, $pixels, $x + 1, $y); } else { $matrix[2][1] = $this->getColor($px, $pixels, $x, $y); } // row 1 if ($x > 0 and $y + 1 < $height) { $matrix[0][2] = $this->getColor($px, $pixels, $x - 1, $y + 1); } else { $matrix[0][2] = $this->getColor($px, $pixels, $x, $y); } if ($y + 1 < $height) { $matrix[1][2] = $this->getColor($px, $pixels, $x, $y + 1); } else { $matrix[1][2] = $this->getColor($px, $pixels, $x, $y); } if ($x + 1 < $width and $y + 1 < $height) { $matrix[2][2] = $this->getColor($px, $pixels, $x + 1, $y + 1); } else { $matrix[2][2] = $this->getColor($px, $pixels, $x, $y); } $edge = $this->convolve($matrix); $edge = intval($edge / 2); if ($edge > 255) { $edge = 255; } /** * @var \ImagickPixel $px Current pixel. */ $finalPx[] = $edge; // R $finalPx[] = $edge; // G $finalPx[] = $edge; // B } $pixelIterator->syncIterator(); /* Sync the iterator, this is important to do on each iteration */ } $new = new \Imagick(); $new->newImage($width, $height, new \ImagickPixel('black')); /* Import the pixels into image. width * height * strlen("RGB") must match count($pixels) */ $new->importImagePixels(0, 0, $width, $height, "RGB", \Imagick::PIXEL_CHAR, $finalPx); $type = $image->getType(); $file = $image->getImageFile(); return new Image($new, $file, $width, $height, $type); // Create new image with updated core }