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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Hi<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">I made this workflow – a bit out of the original question – but found it fun to do - (Like Saturday eve jigsaw puzzle)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">How to count seagulls.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Workflow:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Open some sort of background – eg. OSM – Remember to have your CRS correct<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Add your images to a folder<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Use plugin Import Photos. This gives you the position of the image.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">I estimated the area for the photo – Used the measure line for the ‘setup’.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Georeferenced the 4 corners and added the images (Raster>georeference)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Create a temp scratch layer as a mask for the area with seagulls.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Clip raster by mask layer<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Change the image symbology from rgb to singleband grey<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">In Rasctercalculator find rasterband@1>=130 change col and row with divide by 4 – if I use original pixelsize the next step will have too many polygons.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Rasterpixel to polygon or polygonise<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Select Expression find field ‘Value’ or DN = 0 (depends which finction you use for raster to polygons). Delete selected<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Buffer 0.01 Dissolve<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Multipart to single part<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Find features smaller than a seagull</span><span lang="EN-US" style="font-size:10.0pt;font-family:Wingdings">à</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">
delete<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Find larger polygons (eg. Plastic)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Count polygons<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">In your image 463 seaguls.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Happy counting. In this way your student learn to manually do the tricks – and might do it in Modelbuilder too ;-)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><img width="977" height="655" id="Billede_x0020_22" src="cid:image001.png@01D4CBC6.8A9BDAA0" alt="cid:image005.png@01D4CBC4.6947D1D0"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif"">Regards<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><b><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray;mso-fareast-language:EN-US">Lene Fischer<o:p></o:p></span></b></p>
<p class="MsoNormal" style="line-height:8.0pt"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray">Associate Professor</span><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:black"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray"><o:p> </o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><b><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray;mso-fareast-language:EN-US">University of Copenhagen<o:p></o:p></span></b></p>
<p class="MsoNormal" style="line-height:8.0pt"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray">Department of Geoscience and Natural Resource Management<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray">Forest and Landscape College<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray">Nødebovej 77a<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray">3480 Fredensborg<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray">Denmark<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray"><o:p> </o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray"><o:p> </o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray">MOB +45 40115084<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray"><a href="mailto:lfi@ign.ku.dk" title="lfi@ign.ku.dk"><u><span lang="DA" style="color:gray;text-decoration:none">lfi@ign.ku.dk</span></u></a></span><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray"><o:p> </o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray"><o:p> </o:p></span></p>
<p class="MsoNormal" style="line-height:12.0pt"><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray"><img border="0" width="320" height="122" id="Picture_x0020_2" src="cid:image002.gif@01D4CBC6.8A9BDAA0"></span><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray">
<o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray"><o:p> </o:p></span></p>
<p class="MsoNormal" style="mso-line-height-alt:8.0pt"><a href="@Lene_Fischer"><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray;text-decoration:none"><img border="0" width="25" height="25" id="Picture_x0020_3" src="cid:image003.png@01D4CBC6.8A9BDAA0"></span></a><span style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray">
<span lang="EN-GB"><o:p></o:p></span></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray"><o:p> </o:p></span></p>
<p class="MsoNormal" style="line-height:8.0pt"><span lang="EN-GB" style="font-size:7.5pt;font-family:"Verdana","sans-serif";color:gray"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Verdana","sans-serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Fra:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> GeoForAll [mailto:geoforall-bounces@lists.osgeo.org]
<b>På vegne af </b>Charlie Schweik<br>
<b>Sendt:</b> 23. februar 2019 13:52<br>
<b>Til:</b> OsGeo, GeoForAll<br>
<b>Emne:</b> [Geo4All] Need help -- Unsupervised classification in QGIS of a non-georeferenced aerial photo?<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hi GeoForAll colleagues,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I'm trying to generate an unsupervised classifcation of a single aerial photo taken by a quadcopter of gulls in a water body. I'm trying to count the gulls. <o:p></o:p></p>
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<p class="MsoNormal">The image is in X/Y Cartesian coordinates -- it is not georeferenced. I'm trying to use QGIS' Semi-automated classification plug-in.<o:p></o:p></p>
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<p class="MsoNormal">I can't get it to work because the image isn't in a geographic or projected coordinate system.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Does anyone have any ideas on how I could do this in QGIS? <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thanks in advance,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Charlie Schweik<o:p></o:p></p>
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<p class="MsoNormal"><br clear="all">
<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">-- <o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">Charlie Schweik<o:p></o:p></p>
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<p class="MsoNormal">Professor <o:p></o:p></p>
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<p class="MsoNormal">Department of Environmental Conservation & School of Public Policy<o:p></o:p></p>
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<p class="MsoNormal">University of Massachusetts, Amherst<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Facebook: Charles.Schweik<o:p></o:p></p>
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<p class="MsoNormal">Twitter: @cschweik<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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