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442 lines
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HTML
442 lines
23 KiB
HTML
<!DOCTYPE html>
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<html lang="en">
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<title>Documentation</title>
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<base href="../">
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</head>
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<body id="top">
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<header class="phpdocumentor-header phpdocumentor-section">
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<h1 class="phpdocumentor-title"><a href="" class="phpdocumentor-title__link">Documentation</a></h1>
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<section data-search-form class="phpdocumentor-search">
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<label>
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<span class="visually-hidden">Search for</span>
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<svg class="phpdocumentor-search__icon" width="21" height="20" viewBox="0 0 21 20" fill="none" xmlns="http://www.w3.org/2000/svg">
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<main class="phpdocumentor">
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<input class="phpdocumentor-sidebar__menu-button" type="checkbox" id="sidebar-button" name="sidebar-button" />
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Menu
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</label>
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<aside class="phpdocumentor-column -four phpdocumentor-sidebar">
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<section class="phpdocumentor-sidebar__category">
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<h2 class="phpdocumentor-sidebar__category-header">Namespaces</h2>
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<h4 class="phpdocumentor-sidebar__root-namespace">
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<a href="namespaces/chillerlan.html" class="">chillerlan</a>
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</h4>
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<ul class="phpdocumentor-list">
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<li>
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<a href="namespaces/chillerlan-qrcode.html" class="">QRCode</a>
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</li>
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<li>
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<a href="namespaces/chillerlan-qrcodetest.html" class="">QRCodeTest</a>
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</li>
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</ul>
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</section>
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<section class="phpdocumentor-sidebar__category">
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<h2 class="phpdocumentor-sidebar__category-header">Packages</h2>
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<h4 class="phpdocumentor-sidebar__root-namespace">
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<a href="packages/Application.html" class="">Application</a>
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</h4>
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</section>
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<section class="phpdocumentor-sidebar__category">
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<h2 class="phpdocumentor-sidebar__category-header">Reports</h2>
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<h3 class="phpdocumentor-sidebar__root-package"><a href="reports/deprecated.html">Deprecated</a></h3>
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<h3 class="phpdocumentor-sidebar__root-package"><a href="reports/errors.html">Errors</a></h3>
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<h3 class="phpdocumentor-sidebar__root-package"><a href="reports/markers.html">Markers</a></h3>
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</section>
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<section class="phpdocumentor-sidebar__category">
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<h2 class="phpdocumentor-sidebar__category-header">Indices</h2>
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<h3 class="phpdocumentor-sidebar__root-package"><a href="indices/files.html">Files</a></h3>
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</section>
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</aside>
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<div class="phpdocumentor-column -eight phpdocumentor-content">
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<ul class="phpdocumentor-breadcrumbs">
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<li class="phpdocumentor-breadcrumb"><a href="namespaces/chillerlan.html">chillerlan</a></li>
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<li class="phpdocumentor-breadcrumb"><a href="namespaces/chillerlan-qrcode.html">QRCode</a></li>
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<li class="phpdocumentor-breadcrumb"><a href="namespaces/chillerlan-qrcode-detector.html">Detector</a></li>
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</ul>
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<article class="phpdocumentor-element -class">
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<h2 class="phpdocumentor-content__title">
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GridSampler
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<div class="phpdocumentor-element__package">
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in package
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<ul class="phpdocumentor-breadcrumbs">
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<li class="phpdocumentor-breadcrumb"><a href="packages/Application.html">Application</a></li>
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</ul>
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</div>
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</h2>
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<aside class="phpdocumentor-element-found-in">
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<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>
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:
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<span class="phpdocumentor-element-found-in__line">32</span>
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</aside>
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<p class="phpdocumentor-summary">Implementations of this class can, given locations of finder patterns for a QR code in an
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image, sample the right points in the image to reconstruct the QR code, accounting for
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perspective distortion. It is abstracted since it is relatively expensive and should be allowed
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to take advantage of platform-specific optimized implementations, like Sun's Java Advanced
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Imaging library, but which may not be available in other environments such as J2ME, and vice
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versa.</p>
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<section class="phpdocumentor-description"><p>The implementation used can be controlled by calling #setGridSampler(GridSampler)
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with an instance of a class which implements this interface.</p>
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</section>
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<h5 class="phpdocumentor-tag-list__heading" id="tags">
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Tags
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<a href="#tags" class="headerlink"><i class="fas fa-link"></i></a>
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</h5>
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<dl class="phpdocumentor-tag-list">
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<dt class="phpdocumentor-tag-list__entry">
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<span class="phpdocumentor-tag__name">author</span>
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</dt>
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<dd class="phpdocumentor-tag-list__definition">
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<section class="phpdocumentor-description"><p>Sean Owen</p>
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</section>
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</dd>
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</dl>
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<h3 id="toc">
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Table of Contents
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<a href="#toc" class="headerlink"><i class="fas fa-link"></i></a>
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</h3>
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<dl class="phpdocumentor-table-of-contents">
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<dt class="phpdocumentor-table-of-contents__entry -method -public">
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<a href="classes/chillerlan-QRCode-Detector-GridSampler.html#method_sampleGrid">sampleGrid()</a>
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<span>
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: <a href="classes/chillerlan-QRCode-Decoder-BitMatrix.html"><abbr title="\chillerlan\QRCode\Decoder\BitMatrix">BitMatrix</abbr></a> </span>
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</dt>
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<dd>Samples an image for a rectangular matrix of bits of the given dimension. The sampling
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transformation is determined by the coordinates of 4 points, in the original and transformed
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image space.</dd>
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<dt class="phpdocumentor-table-of-contents__entry -method -private">
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<a href="classes/chillerlan-QRCode-Detector-GridSampler.html#method_checkAndNudgePoints">checkAndNudgePoints()</a>
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<span>
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: void </span>
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</dt>
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<dd>Checks a set of points that have been transformed to sample points on an image against
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the image's dimensions to see if the point are even within the image.</dd>
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</dl>
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<section class="phpdocumentor-methods">
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<h3 class="phpdocumentor-elements__header" id="methods">
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Methods
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<a href="classes/chillerlan-QRCode-Detector-GridSampler.html#methods" class="headerlink"><i class="fas fa-link"></i></a>
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</h3>
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<article
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class="phpdocumentor-element
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-method
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-public
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"
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>
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<h4 class="phpdocumentor-element__name" id="method_sampleGrid">
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sampleGrid()
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<a href="classes/chillerlan-QRCode-Detector-GridSampler.html#method_sampleGrid" class="headerlink"><i class="fas fa-link"></i></a>
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</h4>
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<aside class="phpdocumentor-element-found-in">
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<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>
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:
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<span class="phpdocumentor-element-found-in__line">130</span>
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</aside>
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<p class="phpdocumentor-summary">Samples an image for a rectangular matrix of bits of the given dimension. The sampling
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transformation is determined by the coordinates of 4 points, in the original and transformed
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image space.</p>
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<code class="phpdocumentor-code phpdocumentor-signature ">
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<span class="phpdocumentor-signature__visibility">public</span>
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<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> </span><span class="phpdocumentor-signature__argument__name">$matrix</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type">int </span><span class="phpdocumentor-signature__argument__name">$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> </span><span class="phpdocumentor-signature__argument__name">$transform</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type"><a href="classes/chillerlan-QRCode-Decoder-BitMatrix.html"><abbr title="\chillerlan\QRCode\Decoder\BitMatrix">BitMatrix</abbr></a></span></code>
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<h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
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<dl class="phpdocumentor-argument-list">
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<dt class="phpdocumentor-argument-list__entry">
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<span class="phpdocumentor-signature__argument__name">$matrix</span>
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: <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>
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</dt>
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<dd class="phpdocumentor-argument-list__definition">
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<section class="phpdocumentor-description"></section>
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</dd>
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<dt class="phpdocumentor-argument-list__entry">
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<span class="phpdocumentor-signature__argument__name">$dimension</span>
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: <span class="phpdocumentor-signature__argument__return-type">int</span>
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</dt>
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<dd class="phpdocumentor-argument-list__definition">
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<section class="phpdocumentor-description"></section>
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</dd>
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<dt class="phpdocumentor-argument-list__entry">
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<span class="phpdocumentor-signature__argument__name">$transform</span>
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: <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>
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</dt>
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<dd class="phpdocumentor-argument-list__definition">
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<section class="phpdocumentor-description"></section>
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</dd>
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</dl>
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<h5 class="phpdocumentor-tag-list__heading" id="tags">
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Tags
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<a href="#tags" class="headerlink"><i class="fas fa-link"></i></a>
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</h5>
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<dl class="phpdocumentor-tag-list">
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<dt class="phpdocumentor-tag-list__entry">
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<span class="phpdocumentor-tag__name">throws</span>
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</dt>
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<dd class="phpdocumentor-tag-list__definition">
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<span class="phpdocumentor-tag-link"><a href="classes/chillerlan-QRCode-Detector-QRCodeDetectorException.html"><abbr title="\chillerlan\QRCode\Detector\QRCodeDetectorException">QRCodeDetectorException</abbr></a></span>
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<section class="phpdocumentor-description"><p>if image can't be sampled, for example, if the transformation defined
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by the given points is invalid or results in sampling outside the image boundaries</p>
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</section>
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</dd>
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</dl>
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<h5 class="phpdocumentor-return-value__heading">Return values</h5>
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<span class="phpdocumentor-signature__response_type"><a href="classes/chillerlan-QRCode-Decoder-BitMatrix.html"><abbr title="\chillerlan\QRCode\Decoder\BitMatrix">BitMatrix</abbr></a></span>
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—
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<section class="phpdocumentor-description"><p>representing a grid of points sampled from the image within a region
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defined by the "from" parameters</p>
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</section>
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</article>
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<article
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class="phpdocumentor-element
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-method
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-private
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"
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>
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<h4 class="phpdocumentor-element__name" id="method_checkAndNudgePoints">
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checkAndNudgePoints()
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<a href="classes/chillerlan-QRCode-Detector-GridSampler.html#method_checkAndNudgePoints" class="headerlink"><i class="fas fa-link"></i></a>
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</h4>
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<aside class="phpdocumentor-element-found-in">
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<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>
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:
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<span class="phpdocumentor-element-found-in__line">50</span>
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</aside>
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<p class="phpdocumentor-summary">Checks a set of points that have been transformed to sample points on an image against
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the image's dimensions to see if the point are even within the image.</p>
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<code class="phpdocumentor-code phpdocumentor-signature ">
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<span class="phpdocumentor-signature__visibility">private</span>
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<span class="phpdocumentor-signature__name">checkAndNudgePoints</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> </span><span class="phpdocumentor-signature__argument__name">$matrix</span></span><span class="phpdocumentor-signature__argument"><span>, </span><span class="phpdocumentor-signature__argument__return-type">array<string|int, float> </span><span class="phpdocumentor-signature__argument__name">$points</span></span><span>)</span><span> : </span><span class="phpdocumentor-signature__response_type">void</span></code>
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<section class="phpdocumentor-description"><p>This method will actually "nudge" the endpoints back onto the image if they are found to be
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barely (less than 1 pixel) off the image. This accounts for imperfect detection of finder
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patterns in an image where the QR Code runs all the way to the image border.</p>
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<p>For efficiency, the method will check points from either end of the line until one is found
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to be within the image. Because the set of points are assumed to be linear, this is valid.</p>
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</section>
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<h5 class="phpdocumentor-argument-list__heading">Parameters</h5>
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<dl class="phpdocumentor-argument-list">
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<dt class="phpdocumentor-argument-list__entry">
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<span class="phpdocumentor-signature__argument__name">$matrix</span>
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: <span class="phpdocumentor-signature__argument__return-type"><a href="classes/chillerlan-QRCode-Decoder-BitMatrix.html"><abbr title="\chillerlan\QRCode\Decoder\BitMatrix">BitMatrix</abbr></a></span>
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</dt>
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<dd class="phpdocumentor-argument-list__definition">
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<section class="phpdocumentor-description"><p>image into which the points should map</p>
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</section>
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</dd>
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<dt class="phpdocumentor-argument-list__entry">
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<span class="phpdocumentor-signature__argument__name">$points</span>
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: <span class="phpdocumentor-signature__argument__return-type">array<string|int, float></span>
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</dt>
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<dd class="phpdocumentor-argument-list__definition">
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<section class="phpdocumentor-description"><p>actual points in x1,y1,...,xn,yn form</p>
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</section>
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</dd>
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</dl>
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<h5 class="phpdocumentor-tag-list__heading" id="tags">
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Tags
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<a href="#tags" class="headerlink"><i class="fas fa-link"></i></a>
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</h5>
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<dl class="phpdocumentor-tag-list">
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<dt class="phpdocumentor-tag-list__entry">
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<span class="phpdocumentor-tag__name">throws</span>
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</dt>
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<dd class="phpdocumentor-tag-list__definition">
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<span class="phpdocumentor-tag-link"><a href="classes/chillerlan-QRCode-Detector-QRCodeDetectorException.html"><abbr title="\chillerlan\QRCode\Detector\QRCodeDetectorException">QRCodeDetectorException</abbr></a></span>
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<section class="phpdocumentor-description"><p>if an endpoint is lies outside the image boundaries</p>
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</section>
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</dd>
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</dl>
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<h5 class="phpdocumentor-return-value__heading">Return values</h5>
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<span class="phpdocumentor-signature__response_type">void</span>
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—
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</article>
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</section>
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<script type="text/javascript">
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function loadExternalCodeSnippets(line) {
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Array.prototype.slice.call(document.querySelectorAll('pre[data-src]')).forEach((pre) => {
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var code = document.createElement('code');
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code.className = 'language-' + language;
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pre.textContent = '';
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pre.setAttribute('data-line', line)
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code.textContent = 'Loading…';
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pre.appendChild(code);
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var xhr = new XMLHttpRequest();
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xhr.open('GET', src, true);
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xhr.onreadystatechange = function () {
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if (xhr.readyState == 4) {
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if (xhr.status < 400 && xhr.responseText) {
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Prism.highlightElement(code);
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else if (xhr.status >= 400) {
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code.textContent = '✖ Error ' + xhr.status + ' while fetching file: ' + xhr.statusText;
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|
|
code.textContent = '✖ Error: File does not exist, is empty or trying to view from localhost';
|
|
}
|
|
}
|
|
};
|
|
|
|
xhr.send(null);
|
|
});
|
|
}
|
|
|
|
var modals = document.querySelectorAll("[data-modal]");
|
|
|
|
modals.forEach(function (trigger) {
|
|
trigger.addEventListener("click", function (event) {
|
|
//event.preventDefault();
|
|
const modal = document.getElementById(trigger.dataset.modal);
|
|
modal.classList.add("phpdocumentor-modal__open");
|
|
loadExternalCodeSnippets(trigger.dataset.line)
|
|
const exits = modal.querySelectorAll("[data-exit-button]");
|
|
exits.forEach(function (exit) {
|
|
exit.addEventListener("click", function (event) {
|
|
event.preventDefault();
|
|
modal.classList.remove("phpdocumentor-modal__open");
|
|
});
|
|
});
|
|
});
|
|
});
|
|
</script>
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|
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</article>
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<section data-search-results class="phpdocumentor-search-results phpdocumentor-search-results--hidden">
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<section class="phpdocumentor-search-results__dialog">
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|
<header class="phpdocumentor-search-results__header">
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<h2 class="phpdocumentor-search-results__title">Search results</h2>
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<button class="phpdocumentor-search-results__close"><i class="fas fa-times"></i></button>
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|
</header>
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|
<section class="phpdocumentor-search-results__body">
|
|
<ul class="phpdocumentor-search-results__entries"></ul>
|
|
</section>
|
|
</section>
|
|
</section>
|
|
</div>
|
|
</div>
|
|
<a href="classes/chillerlan-QRCode-Detector-GridSampler.html#top" class="phpdocumentor-back-to-top"><i class="fas fa-chevron-circle-up"></i></a>
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|
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</main>
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<script>
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cssVars({});
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</script>
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<script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/prism.min.js"></script>
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<script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/autoloader/prism-autoloader.min.js"></script>
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<script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-numbers/prism-line-numbers.min.js"></script>
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<script src="https://cdn.jsdelivr.net/npm/prismjs@1.23.0/plugins/line-highlight/prism-line-highlight.min.js"></script>
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</body>
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</html>
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