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konvoluce.php
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<?php
$maska[] = array(1,1,1);
$maska[] = array(1,9,1);
$maska[] = array(1,1,1);
$velikost["maska"] = sizeof($maska);
//vypocet konstanty
for($i=0; $i<=sizeof($maska[0]); $i++) {
for($j=0; $j<=sizeof($maska); $j++) {
$con += $maska[$i][$j]; //konstanta
}
}
//schody
$input[] = array(0,0,0,0,0,0,0,0,0,63);
$input[] = array(0,0,0,0,0,0,0,0,63,63);
$input[] = array(0,63,0,0,0,0,0,63,63,63);
$input[] = array(0,0,0,0,0,0,63,63,63,63);
$input[] = array(0,0,0,0,0,63,63,63,63,63);
$input[] = array(0,0,0,0,0,63,63,63,63,63);
$input[] = array(0,0,0,63,63,63,63,63,63,63);
$input[] = array(0,0,0,63,63,63,63,63,63,63);
$input[] = array(0,0,0,63,63,63,63,63,63,63);
$input[] = array(63,63,63,63,63,63,63,63,63,63);
$input[] = array(63,63,63,63,63,63,63,63,63,63);
//$vstup - vypocet velikosti
$velikost["x"] = sizeof($input[0]);
$velikost["y"] = sizeof($input);
echo "<table border=0>";
for($x=0; $x<$velikost["y"]; $x++ ) {
echo '<tr>';
for($y=0; $y<$velikost["x"]; $y++ ) {
$sum = 0;
$prumer = 0;
//aplikace masky
for($mx=0; $mx<$velikost["maska"]; $mx++ ) {
for($my=0; $my<$velikost["maska"]; $my++ ) {
//soucet hodnot okoli (vc. bodu) s aplikovanou hodnotou masky
$hodnota = $input[($x-1)+$mx][($y-1)+$my];
$sum = $sum + ($hodnota * $maska[$mx][$my]);
}
//$maskaPozice["x"]++;
}
$vystup[$x][$y] = round($sum / $con,0); //prumer zaokrouhlime na cela cisla
//echo str_pad($vystup[$x][$y], 4, " ", STR_PAD_LEFT);
echo '<td style="text-align:right;">'.$vystup[$x][$y].'</td>';
}
echo '</tr>';
}
echo "</table>";
?>