function main()
{
$is_error = false;
//no errors yet . . .
$continue = false;
//continue on to next image in directory?
// set directory of images to work in
if (isset($_GET['directory']) && isset($_GET['action'])) {
$directory = $_GET['directory'];
$action = $_GET['action'];
} else {
// if no directory set, then display form to set the directory
return <<<OUTPUT
<form action="" method="GET">
\tDirectory: <input type="text" name="directory">
\t<input type="radio" name="action" value="difference_series">Difference series
\t<input type="radio" name="action" value="average">Average
\t<input type="radio" name="action" value="threshold">Threshold
\t<input type="radio" name="action" value="to_data">To Data
\t<input type="radio" name="action" value="image_to_hough">To Hough Transform
\t<input type="submit" value="GO">
</form>
OUTPUT;
}
// set number of file in directory to start on
if (isset($_GET['number'])) {
$number = $_GET['number'];
} else {
$number = 0;
}
// start at the first file
//compile list of files in directory
$file_list = collect_files($directory);
if (count($file_list) == 0) {
return "Directory {$directory} is empty.";
}
//couldn't find anything
$output = '';
switch ($action) {
case 'to_data':
if (!isset($file_list[$number])) {
$output .= 'Finished!';
//all done!
break;
}
//if
$image = imagecreatefrompng($directory . $file_list[$number]);
$data = image_to_data($image);
break;
case 'difference_series':
if (!isset($file_list[$number]) || !isset($file_list[$number + 1])) {
$output .= 'No more files to compare.';
//all done!
break;
}
//if
$a = imagecreatefromjpeg($directory . $file_list[$number]);
$b = imagecreatefromjpeg($directory . $file_list[$number + 1]);
if (!($image = image_combine($a, $b, 'difference'))) {
$output .= 'ERROR trying to combine images.';
$is_error = true;
break;
}
//if
write_image($image, 'images/output/', '(' . $file_list[$number] . ')-(' . $file_list[$number + 1] . ')', 'png');
$continue = true;
break;
case 'image_to_hough':
if (!isset($file_list[$number])) {
$output .= 'No more files.';
//done!
break;
}
//if
$image = imagecreatefrompng($directory . $file_list[$number]);
$image = image_to_hough($image);
write_image($image, 'images/output/', "hough({$file_list[$number]})", 'png');
$continue = true;
break;
case 'average':
if (!isset($file_list[$number])) {
$output .= 'No more files to add.';
//all done!
break;
}
//if
$temp_path = 'images/temp/';
$temp_filename = 'temp';
//$image = imagecreatefromjpeg($directory . $file_list[$number]);
$image = imagecreatefrompng($directory . $file_list[$number]);
if (file_exists($temp_path . $temp_filename . '.png')) {
$temp = imagecreatefrompng($temp_path . $temp_filename . '.png');
} else {
$temp = imagecreatetruecolor(imagesx($image), imagesy($image));
}
$num_in_series = count($file_list);
$output .= "adding 1/{$num_in_series}th of image to temp.png";
$constant = 1.0 / $num_in_series;
$image = image_apply_constant($image, $constant, 'multiply');
$image = image_combine($temp, $image, 'sum');
write_image($image, $temp_path, $temp_filename, 'png');
$continue = true;
break;
case 'sum_series':
break;
case 'threshold':
if (!isset($file_list[$number])) {
$output .= 'No more files.';
//all done!
break;
}
//if
$image = imagecreatefrompng($directory . $file_list[$number]);
$image = image_apply_constant($image, 34, 'threshold');
write_image($image, 'images/output/', "thresh({$file_list[$number]})", 'png');
$continue = true;
break;
}
//switch
$next = $number + 1;
if ($is_error) {
$output .= <<<OUTPUT
<br>Ohhh crap, there was an error performing the action {$action} on directory {$directory}<br><br>
Try next pair? <a href="?directory={$directory}&action={$action}&number={$next}">Sure.</a>
OUTPUT;
$continue = false;
} else {
$output .= <<<OUTPUT
Success.<br>
OUTPUT;
}
//if
if ($continue) {
$output .= <<<OUTPUT
Loading next image . . .
<meta http-equiv="refresh" content="0;?number={$next}&action={$action}&directory={$directory}">\t\t
OUTPUT;
}
//if
return $output;
}
function main()
{
$is_error = false;
//no errors yet . . .
$continue = false;
//continue on to next image in directory?
if (isset($_GET['directory'])) {
$directory = $_GET['directory'];
if (substr($directory, -1) != '/') {
$directory = $directory . '/';
}
//add trailing slash
show_directory($directory);
}
// set directory of images to work in
if (isset($_GET['directory']) && isset($_GET['action'])) {
$action = $_GET['action'];
} else {
// if no directory set, then display form to set the directory
return;
}
echo "performing {$action} on directory {$directory}<br />";
$threshold = $_GET['threshold'];
// set number of file in directory to start on
if (isset($_GET['number'])) {
$number = $_GET['number'];
} else {
$number = 0;
}
// start at the first file
//compile list of files in directory
$file_list = collect_files($directory);
if (count($file_list) == 0) {
return "Directory {$directory} is empty.";
}
//couldn't find anything
$output_dir = 'images/output/';
$output = '';
$image_name = '';
switch ($action) {
case 'to_data':
if (!isset($file_list[$number])) {
$output .= 'Finished!';
//all done!
break;
}
//if
$image = file_to_image($directory . $file_list[$number]);
$data = image_to_data($image);
break;
case 'difference_series':
if (!isset($file_list[$number]) || !isset($file_list[$number + 1])) {
$output .= 'No more files to compare.';
//all done!
break;
}
//if
$a = file_to_image($directory . $file_list[$number]);
$b = file_to_image($directory . $file_list[$number + 1]);
if (!($image = image_combine($a, $b, 'difference'))) {
$output .= 'ERROR trying to combine images ' . $file_list[$number] . ' and ' . $file_list[$number + 1];
$is_error = true;
break;
}
//if
$file_name = '(' . $file_list[$number] . ')-(' . $file_list[$number + 1] . ')';
$image_name = $file_name . '.png';
write_image($image, $output_dir, $file_name, 'png');
$continue = true;
break;
case 'image_to_hough':
if (!isset($file_list[$number])) {
$output .= 'No more files.';
//done!
break;
}
//if
if (!($image = file_to_image($directory . $file_list[$number]))) {
return "could not create image from {$directory}{$file_list[$number]}";
}
if (isset($_GET['threshold'])) {
$threshold = $_GET['threshold'];
} else {
$threshold = 128;
}
echo '<img src="' . $directory . $file_list[$number] . '" />';
$image = image_to_hough($image, $threshold);
$file_name = "hough({$file_list[$number]})";
$image_name = $file_name . '.png';
write_image($image, $output_dir, $file_name, 'png');
echo hough_to_image($output_dir . $file_name . '.png');
$continue = true;
break;
case 'average':
if (!isset($file_list[$number])) {
$output .= 'No more files to add.';
//all done!
break;
}
//if
$temp_path = 'images/temp/';
$temp_filename = 'temp';
//$image = imagecreatefromjpeg($directory . $file_list[$number]);
if (!file_exists($directory . $file_list[$number])) {
return "file {$directory}{$file_list[$number]} does not seem to exist.<br />";
}
if (!($image = file_to_image($directory . $file_list[$number]))) {
return "{$directory}{$file_list[$number]} is not an image file<br />";
}
if (file_exists($temp_path . $temp_filename . '.png')) {
echo "temp file found in {$temp_path}{$temp_filename}.png<br />";
if ($number == 0) {
//there shouldn't be a temp file
echo "temp file is from previous batch: deleting . . . <br />";
if (!unlink($temp_path . $temp_filename . '.png')) {
echo "error: could not delete file {$temp_path}{$temp_filename}";
}
}
$temp = file_to_image($temp_path . $temp_filename . '.png');
} else {
echo "{$temp_path}{$temp_filename}.png does not exist, creating . . . <br />";
if (!($temp = imagecreatetruecolor(imagesx($image), imagesy($image)))) {
return 'could not create temporary image';
}
}
$num_in_series = count($file_list);
$output .= "adding the {$number}th 1/{$num_in_series}th of image to temp.png";
$constant = 1.0 / $num_in_series;
$image = image_apply_constant($image, $constant, 'multiply');
$image = image_combine($temp, $image, 'sum');
write_image($image, $temp_path, $temp_filename, 'png');
$continue = true;
break;
case 'sum_series':
break;
case 'threshold':
if (!isset($file_list[$number])) {
$output .= 'No more files.';
//all done!
break;
}
//if
if (isset($_GET['threshold'])) {
$threshold = $_GET['threshold'];
} else {
$threshold = 34;
}
$image = file_to_image($directory . $file_list[$number]);
$image = image_apply_constant($image, $threshold, 'threshold');
$image_name = 'thresh(' . $file_list[$number] . ').png';
write_image($image, $output_dir, "thresh({$file_list[$number]})", 'png');
$continue = true;
break;
}
//switch
$next = $number + 1;
if ($is_error) {
$output .= <<<OUTPUT
<br>Ohhh crap, there was an error performing the action {$action} on directory {$directory}<br><br>
Try next pair? <a href="?directory={$directory}&action={$action}&number={$next}">Sure.</a>
OUTPUT;
$continue = false;
} else {
$output .= <<<OUTPUT
Success.<br>
<img src="{$output_dir}{$image_name}" />
OUTPUT;
}
//if
if ($continue) {
$output .= <<<OUTPUT
<a href="?number={$next}&action={$action}&directory={$directory}&threshold={$threshold}">continue</a><br />\t
OUTPUT;
}
//if
return $output;
}