Intervention/image · error · InvalidArgumentException

The specified position ({x}, {y}) is not within the image ar

Error message

The specified position ({x}, {y}) is not within the image area

What it means

The GD pixel analyzer calls imagecolorat() at the requested coordinates; it returns no index when the position lies outside the image, so the library reports the offending (x, y). Coordinates are zero-based and must satisfy 0 <= x < width and 0 <= y < height.

Source

Thrown at src/Drivers/Gd/Analyzers/PixelColorAnalyzer.php:46

     */
    public function analyze(ImageInterface $image): mixed
    {
        $colorProcessor = $this->driver()->colorProcessor($image);

        return $this->colorAt($colorProcessor, $image->core()->frame($this->frame));
    }

    /**
     * @throws InvalidArgumentException
     * @throws AnalyzerException
     */
    protected function colorAt(ColorProcessorInterface $processor, FrameInterface $frame): ColorInterface
    {
        $gd = $frame->native();
        $index = @imagecolorat($gd, $this->x, $this->y);

        if (!is_int($index)) {
            throw new InvalidArgumentException(
                'The specified position (' . $this->x . ', ' . $this->y . ') is not within the image area',
            );
        }

        try {
            $colors = imagecolorsforindex($gd, $index);
        } catch (ValueError) {
            throw new AnalyzerException(
                'The specified index is outside of the range',
            );
        }

        return $processor->import($colors);
    }
}

View on GitHub (pinned to 5598b9e397)

Solutions

1. Clamp coordinates before picking: $x = max(0, min($x, $image->width() - 1))
2. Validate coordinates against width()/height() at the boundary and reject or default out-of-range values
3. Fix off-by-one in loops: iterate x < width, never x <= width

Example fix

// before
$color = $image->pickColor($x, $y);

// after
$x = max(0, min($x, $image->width() - 1));
$y = max(0, min($y, $image->height() - 1));
$color = $image->pickColor($x, $y);

$x = max(0, min($x, $image->width() - 1));
$y = max(0, min($y, $image->height() - 1));

try {
    $color = $image->pickColor($x, $y);
} catch (\Intervention\Image\Exceptions\InvalidArgumentException $e) {
    $color = $image->pickColor(0, 0);
}

When it happens

Trigger: $image->pickColor($x, $y) with $x >= $image->width() or $y >= $image->height(), negative coordinates, or coordinates computed against a different image's dimensions; loops using <= width instead of < width.

Common situations: Resize/crop pipelines computing coordinates from stale dimensions; hardcoded pixel probes on user uploads of varying sizes; off-by-one loop bounds.

Related errors

• Invalid image size
• GD driver can only decode colors in integer or array format
• GD driver can only decode array color format array{red: int,
• Frame #${position} could not be found in the image
• Invalid image size. Must be int<1, max>

AI-assisted analysis of Intervention/image@5598b9e397 (2026-08-23). Data as JSON: /api/errors/3d57f02abeec12de. Report an issue: GitHub.