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152 lines
8.4 KiB
Plaintext
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<!DOCTYPE html>
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<html>
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<head>
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<meta name="viewport" content="width=device-width, minimum-scale=1.0, maximum-scale=1.0, initial-scale=1.0" />
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<title>Photopea - Advanced Selecting</title>
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<link rel="stylesheet" href="https://blog.photopea.com/wp-content/themes/simplex/style.css" type="text/css" media="screen" />
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</head>
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<body>
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<div id="page">
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<div id="header">
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<a href="//www.photopea.com/learn/" class="title">Learn Photopea</a>
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<!--<p>Web-based image editor.</p>-->
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<a href="//blog.photopea.com">Blog</a> |
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<a class="curr" href="//www.photopea.com/learn">Learn</a> |
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<a href="//www.photopea.com/tuts">Tutorials</a> |
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<div id="sidebar" style="width:22%;">
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<h3>Topics</h3>
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<ul>
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<li class="lvl0"><a href="/learn/">Introduction</a></li>
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<li class="lvl0"><a href="/learn/workspace">Workspace</a></li>
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<li class="lvl1"><a href="/learn/opening-saving">Open and Save</a></li>
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<li class="lvl1"><a href="/learn/navigation">Navigation</a></li>
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<li class="lvl1"><a href="/learn/image-size">Image size</a></li>
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<li class="lvl0"><a href="/learn/layers">Layers</a></li>
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<li class="lvl1"><a href="/learn/masks">Masks</a></li>
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<li class="lvl1"><a href="/learn/layer-styles">Layer Styles</a></li>
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<li class="lvl1"><a href="/learn/smart-objects">Smart Objects</a></li>
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<li class="lvl1"><a href="/learn/other-layers">Other Layers</a></li>
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<li class="lvl0"><a href="/learn/layer-manipulation">Layer Editing</a></li>
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<li class="lvl1"><a href="/learn/free-transform">Free Transform</a></li>
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<li class="lvl1"><a href="/learn/adjustments-filters">Adjust. & Filters</a></li>
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<li class="lvl0"><a href="/learn/selections">Selections</a></li>
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<li class="lvl1"><a href="/learn/creating-selections">Make Selections</a></li>
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<li class="lvl1 active"><a href="/learn/advanced-selecting">Advanced Selecting</a></li>
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<li class="lvl1"><a href="/learn/refine-edge">Refine Edge</a></li>
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<li class="lvl1"><a href="/learn/moving-selected-data">Move Selected Data</a></li>
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<li class="lvl0"><a href="/learn/brush-tools">Brush Tools</a></li>
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<li class="lvl1"><a href="/learn/bt-basic">Basic Tools</a></li>
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<li class="lvl1"><a href="/learn/bt-advanced">Advanced Tools</a></li>
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<li class="lvl1"><a href="/learn/bt-smart">Smart Tools</a></li>
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<li class="lvl1"><a href="/learn/vg-structure">The Structure</a></li>
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<li class="lvl1"><a href="/learn/vg-manipulation">Editing Shapes</a></li>
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<li class="lvl1"><a href="/learn/vg-creating">Creating Shapes</a></li>
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<li class="lvl1"><a href="/learn/vg-vectorize">Vectorize Bitmap</a></li>
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<li class="lvl0"><a href="/learn/other">Other</a></li>
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<li class="lvl1"><a href="/learn/color-spaces">Color Spaces</a></li>
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<li class="lvl1"><a href="/learn/guides-grid-snapping">Guides & Snapping</a></li>
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<li class="lvl1"><a href="/learn/animations">Animations</a></li>
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<li class="lvl1"><a href="/learn/slices">Slices</a></li>
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<li class="lvl1"><a href="/learn/layer-comps">Layer Comps</a></li>
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<li class="lvl1"><a href="/learn/actions">Actions</a></li>
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<li class="lvl1"><a href="/learn/scripts">Scripts</a></li>
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</ul>
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</div>
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<div id="content" style="width:78%;">
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<div class="post">
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<h1>Advanced Selecting</h1>
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<p>We already know, how to make basic selections "manually", e.g. with the Ellipse Select or a Lasso tool.
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But making complex selections with these tools can take a lot of time. There are more advanced tools, that can help us.</p>
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<h2><img class="inline" src="//www.photopea.com/img/tools/mwand.png" />Magic Wand</h2>
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<p>Magic wand allows you to select pixels with the same (or similar) color. Once you click somewhere with the Magic Wand,
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the pixel under the mouse will be selected, as well as all other pixels, that have a color similar to that pixel.</p>
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<p>There is a <b>Contiguous mode</b> option (in the top menu). When it is on, the Magic Wand will select only those similar pixels,
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that are connected to the source pixel (i.e. it will select the whole area, that has the same color, but not other areas, which are separated from this area).
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When this option is disabled, the Magic Wand will select all similar pixels from the whole image, even if they are not conencted to the source pixel.</p>
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<p>Here you can see the result of clicking on the pixel (marked by the white cross) with the Contiguous mode enabled and disabled.</p>
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<img src="//i.imgur.com/e1TVQ9Q.png" />
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<p>There is also a <b>Tolerance</b> parameter in the top menu, which defines how much similar colors you want to select
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(larger values produce "wider" selections).</p>
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<h2><img class="inline" src="//www.photopea.com/img/tools/qselect.png" />Quick Selection</h2>
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<p>This is probably the most advanced selecting tool, that can really save your time.
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For many people, this is the only selection tool they ever use.</p>
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<p>Quick Selection works like a brush, you can choose the brush tip diameter in the top menu.
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Then, draw strokes over the area, that you want to select. It adds each stroke to a selection, and it also gradually <b>expands</b> it
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into the surrounding area, selecting the related parts (similarly to a Magic Wand).</p>
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<p>Sometimes, the tool may go beyond the area, that you want to select, and select much greater part.
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Switch to the <b>Subtract</b> mode in the top menu (or hold the Alt key) and you can remove the unwanted parts in the same way.</p>
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<p>There is a hidden layer inside the Quick Selection tool. As you draw strokes with the New or Union mode, the tool draws into that layer with the white color.
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When you draw with the Subtract mode, the strokes are drawn using the black color.
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This layer is used as a guide for the tool: white areas must always be inside the selection, black areas must not be in the selection,
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and the remaining area will be smartly deduced from this, by analyzing the actual image.
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The more white and black strokes you specify, the more information the tool has for making a good selection.</p>
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<p>The <b>New</b> mode makes the tool forget all previously specified strokes and start over with an empty hidden layer.</p>
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<h2>Color Range</h2>
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<p>This tool allows us select a specific color from the image. Unlike the Magic Wand, which either fully selects or fully ignores the area,
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Color range can create partial selections, depending on how much of that color is present in the area.</p>
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<p>Start the tool by pressing Select - Color Range. Next, click on the color (in the image), that you want to select.
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The Color Range window shows you the preview of the selection: the brightness corresponds to the degree of selection of each pixel.
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E.g. if you click on the red t-shirt in the image, this t-shirt should be white in the preview, and other parts, that are not red, should be black in the preview.
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The <b>Fuzziness</b> parameter lets you add also all similar colors to the selection, or select just the exact color that you clicked on.</p>
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</div>
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<h2 style="margin-top: 4em">Comments</h2>
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<p>Do you need help? Ask us at <a href="//www.reddit.com/r/photopea/" target="_blank">our Reddit</a>!</p>
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