/**
* @param \Imagick $imagick
* @param int $graphWidth
* @param int $graphHeight
*/
public static function analyzeImage(\Imagick $imagick, $graphWidth = 255, $graphHeight = 127)
{
$sampleHeight = 20;
$border = 2;
$imagick->transposeImage();
$imagick->scaleImage($graphWidth, $sampleHeight);
$imageIterator = new \ImagickPixelIterator($imagick);
$luminosityArray = [];
foreach ($imageIterator as $row => $pixels) {
/* Loop through pixel rows */
foreach ($pixels as $column => $pixel) {
/* Loop through the pixels in the row (columns) */
/** @var $pixel \ImagickPixel */
if (false) {
$color = $pixel->getColor();
$luminosityArray[] = $color['r'];
} else {
$hsl = $pixel->getHSL();
$luminosityArray[] = $hsl['luminosity'];
}
}
/* Sync the iterator, this is important to do on each iteration */
$imageIterator->syncIterator();
break;
}
$draw = new \ImagickDraw();
$strokeColor = new \ImagickPixel('red');
$fillColor = new \ImagickPixel('red');
$draw->setStrokeColor($strokeColor);
$draw->setFillColor($fillColor);
$draw->setStrokeWidth(0);
$draw->setFontSize(72);
$draw->setStrokeAntiAlias(true);
$previous = false;
$x = 0;
foreach ($luminosityArray as $luminosity) {
$pos = $graphHeight - 1 - $luminosity * ($graphHeight - 1);
if ($previous !== false) {
/** @var $previous int */
//printf ( "%d, %d, %d, %d <br/>\n" , $x - 1, $previous, $x, $pos);
$draw->line($x - 1, $previous, $x, $pos);
}
$x += 1;
$previous = $pos;
}
$plot = new \Imagick();
$plot->newImage($graphWidth, $graphHeight, 'white');
$plot->drawImage($draw);
$outputImage = new \Imagick();
$outputImage->newImage($graphWidth, $graphHeight + $sampleHeight, 'white');
$outputImage->compositeimage($plot, \Imagick::COMPOSITE_ATOP, 0, 0);
$outputImage->compositeimage($imagick, \Imagick::COMPOSITE_ATOP, 0, $graphHeight);
$outputImage->borderimage('black', $border, $border);
$outputImage->setImageFormat("png");
App::cachingHeader("Content-Type: image/png");
echo $outputImage;
}
function fxAnalyzeImage(\Imagick $imagick)
{
$graphWidth = $imagick->getImageWidth();
$sampleHeight = 20;
$graphHeight = 128;
$border = 2;
$imageIterator = new \ImagickPixelIterator($imagick);
$reds = [];
foreach ($imageIterator as $pixels) {
/* Loop through pixel rows */
foreach ($pixels as $pixel) {
/* Loop through the pixels in the row (columns) */
/** @var $pixel \ImagickPixel */
$color = $pixel->getColor();
$reds[] = $color['r'];
}
$imageIterator->syncIterator();
/* Sync the iterator, this is important to do on each iteration */
}
$draw = new \ImagickDraw();
$strokeColor = new \ImagickPixel('red');
$fillColor = new \ImagickPixel('none');
$draw->setStrokeColor($strokeColor);
$draw->setFillColor($fillColor);
$draw->setStrokeWidth(1);
$draw->setFontSize(72);
$draw->setStrokeAntiAlias(true);
$x = 0;
$points = [];
foreach ($reds as $red) {
$pos = $graphHeight - $red * $graphHeight / 256;
$points[] = ['x' => $x, 'y' => $pos];
$x += 1;
}
$draw->polyline($points);
$plot = new \Imagick();
$plot->newImage($graphWidth, $graphHeight, 'white');
$plot->drawImage($draw);
$outputImage = new \Imagick();
$outputImage->newImage($graphWidth, $graphHeight + $sampleHeight, 'white');
$outputImage->compositeimage($plot, \Imagick::COMPOSITE_ATOP, 0, 0);
$imagick->resizeimage($imagick->getImageWidth(), $sampleHeight, \Imagick::FILTER_LANCZOS, 1);
$outputImage->compositeimage($imagick, \Imagick::COMPOSITE_ATOP, 0, $graphHeight);
$outputImage->borderimage('black', $border, $border);
$outputImage->setImageFormat("png");
header("Content-Type: image/png");
echo $outputImage;
}
