mrkad
/
php-qrcode
mirror da https://github.com/chillerlan/php-qrcode.git


			
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        <h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
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            <li class="phpdocumentor-breadcrumb"><a href="namespaces/chillerlan-qrcode.html">QRCode</a></li>
            <li class="phpdocumentor-breadcrumb"><a href="namespaces/chillerlan-qrcode-detector.html">Detector</a></li>
    </ul>

    <article class="phpdocumentor-element -class">
        <h2 class="phpdocumentor-content__title">
    GridSampler

    
            <div class="phpdocumentor-element__package">
            in package
            <ul class="phpdocumentor-breadcrumbs">
                                    <li class="phpdocumentor-breadcrumb"><a href="packages/Application.html">Application</a></li>
                            </ul>
        </div>
    
    
    </h2>

<div class="phpdocumentor-label-line">

    <div class="phpdocumentor-label phpdocumentor-label--success"><span>Final</span><span>Yes</span></div>


</div>

        <aside class="phpdocumentor-element-found-in">
    <abbr class="phpdocumentor-element-found-in__file" title="src/Detector/GridSampler.php"><a href="files/src-detector-gridsampler.html"><abbr title="src/Detector/GridSampler.php">GridSampler.php</abbr></a></abbr>
    :
    <span class="phpdocumentor-element-found-in__line">31</span>

    </aside>

            <p class="phpdocumentor-summary">Implementations of this class can, given locations of finder patterns for a QR code in an
image, sample the right points in the image to reconstruct the QR code, accounting for
perspective distortion. It is abstracted since it is relatively expensive and should be allowed
to take advantage of platform-specific optimized implementations, like Sun&#039;s Java Advanced
Imaging library, but which may not be available in other environments such as J2ME, and vice
versa.</p>

    <section class="phpdocumentor-description"><p>The implementation used can be controlled by calling #setGridSampler(GridSampler)
with an instance of a class which implements this interface.</p>
</section>


    <h5 class="phpdocumentor-tag-list__heading" id="tags">
        Tags
        <a href="classes/chillerlan-QRCode-Detector-GridSampler.html#tags" class="headerlink"><i class="fas fa-link"></i></a>

    </h5>
    <dl class="phpdocumentor-tag-list">
                                    <dt class="phpdocumentor-tag-list__entry">
                    <span class="phpdocumentor-tag__name">author</span>
                </dt>
                <dd class="phpdocumentor-tag-list__definition">
                                                                                
                                                 <section class="phpdocumentor-description"><p>Sean Owen</p>
</section>

                                    </dd>
                                            </dl>


<h3 id="toc">
    Table of Contents
    <a href="classes/chillerlan-QRCode-Detector-GridSampler.html#toc" class="headerlink"><i class="fas fa-link"></i></a>

</h3>


<h4 id="toc-properties">
    Properties
    <a href="classes/chillerlan-QRCode-Detector-GridSampler.html#toc-properties" class="headerlink"><i class="fas fa-link"></i></a>

</h4>
<dl class="phpdocumentor-table-of-contents">
            <dt class="phpdocumentor-table-of-contents__entry -property -private">
    <a href="classes/chillerlan-QRCode-Detector-GridSampler.html#property_points">$points</a>
    <span>
                        &nbsp;: array&lt;string|int, mixed&gt;            </span>
</dt>

    </dl>

<h4 id="toc-methods">
    Methods
    <a href="classes/chillerlan-QRCode-Detector-GridSampler.html#toc-methods" class="headerlink"><i class="fas fa-link"></i></a>

</h4>
<dl class="phpdocumentor-table-of-contents">
            <dt class="phpdocumentor-table-of-contents__entry -method -public">
    <a href="classes/chillerlan-QRCode-Detector-GridSampler.html#method_sampleGrid">sampleGrid()</a>
    <span>
                                &nbsp;: <a href="classes/chillerlan-QRCode-Decoder-BitMatrix.html"><abbr title="\chillerlan\QRCode\Decoder\BitMatrix">BitMatrix</abbr></a>    </span>
</dt>
<dd>Samples an image for a rectangular matrix of bits of the given dimension. The sampling
transformation is determined by the coordinates of 4 points, in the original and transformed
image space.</dd>

            <dt class="phpdocumentor-table-of-contents__entry -method -private">
    <a href="classes/chillerlan-QRCode-Detector-GridSampler.html#method_checkAndNudgePoints">checkAndNudgePoints()</a>
    <span>
                                &nbsp;: void    </span>
</dt>
<dd>Checks a set of points that have been transformed to sample points on an image against
the image&#039;s dimensions to see if the point are even within the image.</dd>

    </dl>


    <section class="phpdocumentor-properties">
        <h3 class="phpdocumentor-elements__header" id="properties">
            Properties
            <a href="classes/chillerlan-QRCode-Detector-GridSampler.html#properties" class="headerlink"><i class="fas fa-link"></i></a>

        </h3>
                    <article
        class="
            phpdocumentor-element
            -property
            -private
                                                        "
>
    <h4 class="phpdocumentor-element__name" id="property_points">
        $points
        <a href="classes/chillerlan-QRCode-Detector-GridSampler.html#property_points" class="headerlink"><i class="fas fa-link"></i></a>

        <span class="phpdocumentor-element__modifiers">
                                </span>
    </h4>
    <aside class="phpdocumentor-element-found-in">
    <abbr class="phpdocumentor-element-found-in__file" title="src/Detector/GridSampler.php"><a href="files/src-detector-gridsampler.html"><abbr title="src/Detector/GridSampler.php">GridSampler.php</abbr></a></abbr>
    :
    <span class="phpdocumentor-element-found-in__line">33</span>

    </aside>

    
    <code class="phpdocumentor-code phpdocumentor-signature ">
    <span class="phpdocumentor-signature__visibility">private</span>
        <span class="phpdocumentor-signature__type">array&lt;string|int, mixed&gt;</span>
    <span class="phpdocumentor-signature__name">$points</span>
    </code>

    
</article>
            </section>

            <section class="phpdocumentor-methods">
        <h3 class="phpdocumentor-elements__header" id="methods">
            Methods
            <a href="classes/chillerlan-QRCode-Detector-GridSampler.html#methods" class="headerlink"><i class="fas fa-link"></i></a>

        </h3>
                    <article
        class="phpdocumentor-element
            -method
            -public
                                                        "
>
    <h4 class="phpdocumentor-element__name" id="method_sampleGrid">
        sampleGrid()
        <a href="classes/chillerlan-QRCode-Detector-GridSampler.html#method_sampleGrid" class="headerlink"><i class="fas fa-link"></i></a>

    </h4>
    <aside class="phpdocumentor-element-found-in">
    <abbr class="phpdocumentor-element-found-in__file" title="src/Detector/GridSampler.php"><a href="files/src-detector-gridsampler.html"><abbr title="src/Detector/GridSampler.php">GridSampler.php</abbr></a></abbr>
    :
    <span class="phpdocumentor-element-found-in__line">130</span>

    </aside>

        <p class="phpdocumentor-summary">Samples an image for a rectangular matrix of bits of the given dimension. The sampling
transformation is determined by the coordinates of 4 points, in the original and transformed
image space.</p>

    <code class="phpdocumentor-code phpdocumentor-signature ">
    <span class="phpdocumentor-signature__visibility">public</span>
                    <span class="phpdocumentor-signature__name">sampleGrid</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type"><a href="classes/chillerlan-QRCode-Decoder-BitMatrix.html"><abbr title="\chillerlan\QRCode\Decoder\BitMatrix">BitMatrix</abbr></a>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$matrix</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$dimension</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type"><a href="classes/chillerlan-QRCode-Detector-PerspectiveTransform.html"><abbr title="\chillerlan\QRCode\Detector\PerspectiveTransform">PerspectiveTransform</abbr></a>&nbsp;</span><span class="phpdocumentor-signature__argument__name">$transform</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><a href="classes/chillerlan-QRCode-Decoder-BitMatrix.html"><abbr title="\chillerlan\QRCode\Decoder\BitMatrix">BitMatrix</abbr></a></span></code>

    <div class="phpdocumentor-label-line">
        </div>
    
        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
    <dl class="phpdocumentor-argument-list">
                    <dt class="phpdocumentor-argument-list__entry">
                <span class="phpdocumentor-signature__argument__name">$matrix</span>
                : <span class="phpdocumentor-signature__argument__return-type"><a href="classes/chillerlan-QRCode-Decoder-BitMatrix.html"><abbr title="\chillerlan\QRCode\Decoder\BitMatrix">BitMatrix</abbr></a></span>
                            </dt>
            <dd class="phpdocumentor-argument-list__definition">
                
            </dd>
                    <dt class="phpdocumentor-argument-list__entry">
                <span class="phpdocumentor-signature__argument__name">$dimension</span>
                : <span class="phpdocumentor-signature__argument__return-type">int</span>
                            </dt>
            <dd class="phpdocumentor-argument-list__definition">
                
            </dd>
                    <dt class="phpdocumentor-argument-list__entry">
                <span class="phpdocumentor-signature__argument__name">$transform</span>
                : <span class="phpdocumentor-signature__argument__return-type"><a href="classes/chillerlan-QRCode-Detector-PerspectiveTransform.html"><abbr title="\chillerlan\QRCode\Detector\PerspectiveTransform">PerspectiveTransform</abbr></a></span>
                            </dt>
            <dd class="phpdocumentor-argument-list__definition">
                
            </dd>
            </dl>

    
    <h5 class="phpdocumentor-tag-list__heading" id="tags">
        Tags
        <a href="classes/chillerlan-QRCode-Detector-GridSampler.html#method_sampleGrid#tags" class="headerlink"><i class="fas fa-link"></i></a>

    </h5>
    <dl class="phpdocumentor-tag-list">
                                    <dt class="phpdocumentor-tag-list__entry">
                    <span class="phpdocumentor-tag__name">throws</span>
                </dt>
                <dd class="phpdocumentor-tag-list__definition">
                                                                <span class="phpdocumentor-tag-link"><a href="classes/chillerlan-QRCode-Detector-QRCodeDetectorException.html"><abbr title="\chillerlan\QRCode\Detector\QRCodeDetectorException">QRCodeDetectorException</abbr></a></span>
                                                            
                                                 <section class="phpdocumentor-description"><p>if image can't be sampled, for example, if the transformation defined
by the given points is invalid or results in sampling outside the image boundaries</p>
</section>

                                    </dd>
                                            </dl>

            <section>
        <h5 class="phpdocumentor-return-value__heading">Return values</h5>
        <span class="phpdocumentor-signature__response_type"><a href="classes/chillerlan-QRCode-Decoder-BitMatrix.html"><abbr title="\chillerlan\QRCode\Decoder\BitMatrix">BitMatrix</abbr></a></span>
                    &mdash;
                <section class="phpdocumentor-description"><p>representing a grid of points sampled from the image within a region
defined by the &quot;from&quot; parameters</p>
</section>

            </section>

</article>
                    <article
        class="phpdocumentor-element
            -method
            -private
                                                        "
>
    <h4 class="phpdocumentor-element__name" id="method_checkAndNudgePoints">
        checkAndNudgePoints()
        <a href="classes/chillerlan-QRCode-Detector-GridSampler.html#method_checkAndNudgePoints" class="headerlink"><i class="fas fa-link"></i></a>

    </h4>
    <aside class="phpdocumentor-element-found-in">
    <abbr class="phpdocumentor-element-found-in__file" title="src/Detector/GridSampler.php"><a href="files/src-detector-gridsampler.html"><abbr title="src/Detector/GridSampler.php">GridSampler.php</abbr></a></abbr>
    :
    <span class="phpdocumentor-element-found-in__line">50</span>

    </aside>

        <p class="phpdocumentor-summary">Checks a set of points that have been transformed to sample points on an image against
the image&#039;s dimensions to see if the point are even within the image.</p>

    <code class="phpdocumentor-code phpdocumentor-signature ">
    <span class="phpdocumentor-signature__visibility">private</span>
                    <span class="phpdocumentor-signature__name">checkAndNudgePoints</span><span>(</span><span class="phpdocumentor-signature__argument"><span class="phpdocumentor-signature__argument__return-type">int&nbsp;</span><span class="phpdocumentor-signature__argument__name">$dimension</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>

    <div class="phpdocumentor-label-line">
        </div>
        <section class="phpdocumentor-description"><p>This method will actually &quot;nudge&quot; the endpoints back onto the image if they are found to be
barely (less than 1 pixel) off the image. This accounts for imperfect detection of finder
patterns in an image where the QR Code runs all the way to the image border.</p>
<p>For efficiency, the method will check points from either end of the line until one is found
to be within the image. Because the set of points are assumed to be linear, this is valid.</p>
</section>

        <h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
    <dl class="phpdocumentor-argument-list">
                    <dt class="phpdocumentor-argument-list__entry">
                <span class="phpdocumentor-signature__argument__name">$dimension</span>
                : <span class="phpdocumentor-signature__argument__return-type">int</span>
                            </dt>
            <dd class="phpdocumentor-argument-list__definition">
                    <section class="phpdocumentor-description"><p>matrix width/height</p>
</section>

            </dd>
            </dl>

    
    <h5 class="phpdocumentor-tag-list__heading" id="tags">
        Tags
        <a href="classes/chillerlan-QRCode-Detector-GridSampler.html#method_checkAndNudgePoints#tags" class="headerlink"><i class="fas fa-link"></i></a>

    </h5>
    <dl class="phpdocumentor-tag-list">
                                    <dt class="phpdocumentor-tag-list__entry">
                    <span class="phpdocumentor-tag__name">throws</span>
                </dt>
                <dd class="phpdocumentor-tag-list__definition">
                                                                <span class="phpdocumentor-tag-link"><a href="classes/chillerlan-QRCode-Detector-QRCodeDetectorException.html"><abbr title="\chillerlan\QRCode\Detector\QRCodeDetectorException">QRCodeDetectorException</abbr></a></span>
                                                            
                                                 <section class="phpdocumentor-description"><p>if an endpoint is lies outside the image boundaries</p>
</section>

                                    </dd>
                                            </dl>

    
</article>
            </section>

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