CODEWITHSUNDEEP
php
ratna
ratna

Reputation: 11

Trying to get image scanned but getting same long list error

I am trying to scan a answer sheet and I am getting the list of errors on server as this code is part of batch job process.

my code is:

global $CFG;

    //if ($x >= imagesx($this->image) or $x >= imagesy($this->image)) { // point is out of range

    if ($x > imagesx($this->image) or $x > imagesy($this->image)) { 
        return false; 
    }
    $rgb = imagecolorsforindex($this->image, imagecolorat($this->image, $x, $y));
    $gray = $rgb['red'] + $rgb['green'] + $rgb['blue'];

    if ($gray > $this->papergray) {
        return false;
    } else {
        return true;
    }

the error is in line: 

$rgb = imagecolorsforindex($this->image, imagecolorat($this->image, $x, $y));

And error is:

Notice: imagecolorat(): 1520,-416 is out of bounds in C:\inetpub\wwwroot\elms\mo d\offlinequiz\report\rimport\scanner.php on line 1090

Notice: imagecolorat(): 1520,-415 is out of bounds in C:\inetpub\wwwroot\elms\mo d\offlinequiz\report\rimport\scanner.php on line 1090

Notice: imagecolorat(): 1520,-416 is out of bounds in C:\inetpub\wwwroot\elms\mo d\offlinequiz\report\rimport\scanner.php on line 1090

(Cont ....)

Upvotes: 1

Views: 121

Answers (2)

Marc B
Marc B

Reputation: 360742

Typo:

if ($x > imagesx($this->image) or $x > imagesy($this->image)) { 
                                   ^---------^

You'd doing width-width/width-height comparisons, instead of width-width/heigh-height.

Most likely if you have $y for the indicated var, you'd never get error, as your negative $y would obviously never be larger than the image's height.

Upvotes: 2

ensonic
ensonic

Reputation: 3450

You should also check that $x and $y are >0. In the error messages $y is negative.

Upvotes: 0

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