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<p><font size="4"><font face="Helvetica, Arial, sans-serif">Hello
Loke:</font></font></p>
<p><font size="4"><font face="Helvetica, Arial, sans-serif">We are
working on a project in Date orchards. We also tried to create
a point layer of tree crowns using drone acquired LIDAR. We
created a Canopy Height Model, then used a local maxima
procedure to identify crowns. </font></font><font size="4"><font
face="Helvetica, Arial, sans-serif"><font size="4"><font
face="Helvetica, Arial, sans-serif">It was a bit
disappointing. </font></font> It seems that dates,
especially, have local peaks not at the tree center: Some of
the central fronds extend outward from the tree center and
they are the highest points. So we got more than one "crown"
for each tree, and not really at the tree center. <br>
</font></font></p>
<p><font size="4"><font face="Helvetica, Arial, sans-serif">A better
approach was to delineate the circumferences of each tree as
polygons, from the CHM, and a minimum height above ground.
Then we took the centroid of each polygon. That worked more or
less OK on young orchards. But with older orchards, having a
wide spread of fronds, and the canopy of one tree touching the
next, this method also failed.</font></font></p>
<p><font size="4"><font face="Helvetica, Arial, sans-serif">So, not
really a helpful suggestion, only possible pitfalls to look
out for...</font></font></p>
<p><font size="4"><font face="Helvetica, Arial, sans-serif"><br>
</font></font></p>
<p><font size="4"><font face="Helvetica, Arial, sans-serif">Best,</font></font></p>
<p><font size="4"><font face="Helvetica, Arial, sans-serif">Micha<br>
</font></font></p>
<font size="4"><font face="Helvetica, Arial, sans-serif"> </font></font>
<p></p>
<div class="moz-cite-prefix">On 21/06/2023 11:10, Loke Jian Munn via
QGIS-User wrote:<br>
</div>
<blockquote type="cite"
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<p class="MsoNormal">Resend to include the attachment.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thank you.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal"><b><span
style="color:#005826;letter-spacing:-.3pt;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW">Loke
Jian Munn</span></b><span
style="font-size:12.0pt;font-family:"MS
PGothic",sans-serif;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:3.0pt"><span
style="color:#585858;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW">Information
Technology (IT) Department</span><span
style="font-size:12.0pt;font-family:"MS
PGothic",sans-serif;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="color:#585858;mso-fareast-language:ZH-TW"><img
style="width:1.802in;height:.7604in"
id="Picture_x0020_6"
src="cid:part1.j00kt6Qr.I0r7aKrJ@gmail.com" class=""
width="173" height="73"></span><span
style="font-size:12.0pt;font-family:"MS
PGothic",sans-serif;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-top:6.0pt"><b><span
style="font-size:9.5pt;color:#005826;letter-spacing:-.2pt;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW">KUALA
LUMPUR KEPONG BERHAD</span></b><span
style="font-size:12.0pt;font-family:"MS
PGothic",sans-serif;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:95%"><span
style="font-size:9.5pt;line-height:95%;color:#585858;letter-spacing:-.1pt;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW">Wisma
Taiko,</span><span
style="font-size:12.0pt;line-height:95%;font-family:"MS
PGothic",sans-serif;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:95%"><span
style="font-size:9.5pt;line-height:95%;color:#585858;letter-spacing:-.1pt;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW">No.
1, Jalan S.P. Seenivasagam,</span><span
style="font-size:12.0pt;line-height:95%;font-family:"MS
PGothic",sans-serif;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:95%"><span
style="font-size:9.5pt;line-height:95%;color:#585858;letter-spacing:-.1pt;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW">30000
Ipoh,Perak Darul Ridzuan,Malaysia</span><span
style="font-size:12.0pt;line-height:95%;font-family:"MS
PGothic",sans-serif;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:95%"><b><span
style="font-size:9.5pt;line-height:95%;color:#005826;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW">T
:
</span></b><span
style="font-size:9.5pt;line-height:95%;color:#585858;letter-spacing:-.1pt;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW">+605
240 8000 (ext. 2443)</span><span
style="font-size:12.0pt;line-height:95%;font-family:"MS
PGothic",sans-serif;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-top:4.0pt;line-height:85%"><a
href="https://clicktime.symantec.com/15tpDKjABDCCmu4drBEZD?h=4-LzQeEUOcKmp7sCwswGafke694l_dZCDQJ4Rb8N8bc=&u=http://www.klk.com.my/"
moz-do-not-send="true"><span
style="font-size:9.5pt;line-height:85%;color:#585858;mso-fareast-language:ZH-TW;text-decoration:none"><img
style="width:1.052in;height:.1354in"
id="Picture_x0020_7"
src="cid:part2.V03RIXGp.K0cpCJD3@gmail.com" alt="A
close up of a sign
Description automatically generated" class=""
width="101" height="13" border="0"></span></a><a
href="https://clicktime.symantec.com/15tpJ9vSdpsoBqtZPjdhq?h=bX-LFOj0HrSJV_t-3L_WhMP3i5PRx5AtNBaHlI02C7k=&u=http://www.linkedin.com/company/klkberhad"
moz-do-not-send="true"><b><span
style="font-size:9.5pt;line-height:85%;color:#005826;letter-spacing:-.2pt;mso-fareast-language:ZH-TW;text-decoration:none"><img
style="width:.6041in;height:.1354in"
id="Picture_x0020_8"
src="cid:part3.L5Ccwmj2.thWDgHPt@gmail.com" alt="A
close up of a sign
Description automatically generated" class=""
width="58" height="13" border="0"></span></b></a><span
style="font-size:12.0pt;line-height:85%;font-family:"MS
PGothic",sans-serif;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW"
lang="EN-US"><o:p></o:p></span></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span
lang="EN-US"> Loke Jian Munn
<br>
<b>Sent:</b> Wednesday, 21 June, 2023 4:09 PM<br>
<b>To:</b> kirk <a class="moz-txt-link-rfc2396E" href="mailto:kirk@nortekresources.com"><kirk@nortekresources.com></a>;
<a class="moz-txt-link-abbreviated" href="mailto:qgis-user@lists.osgeo.org">qgis-user@lists.osgeo.org</a>; Richard McDonnell
<a class="moz-txt-link-rfc2396E" href="mailto:richard.mcdonnell@opw.ie"><richard.mcdonnell@opw.ie></a><br>
<b>Subject:</b> RE: <o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hi, <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">As mention previously, I need NIR band to
perform the NDVI, however my drone sensor does not record NIR
band.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">So, I trying another way which is crop
counting from orthophoto with Python and Scikit Image. The
whole process is geospatial as it works with raster and
shapefiles and results are finally displayed on QGIS.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">But the results I get are like below:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><br>
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">After Zoom in: <o:p></o:p></p>
<p class="MsoNormal"><br>
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">May I know what’s goes wrong ? I have
attached the Python code above for references. For this
project, I using an Orthomosaic layer with resolution of 5cm.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Appreciate if you can provide me some
guidelines or insights in this as this is my first time
touching python and scikit.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thank you.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<div>
<p class="MsoNormal"><b><span
style="color:#005826;letter-spacing:-.3pt;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW">Loke
Jian Munn</span></b><span
style="font-size:12.0pt;font-family:"MS
PGothic",sans-serif;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:3.0pt"><span
style="color:#585858;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW">Information
Technology (IT) Department</span><span
style="font-size:12.0pt;font-family:"MS
PGothic",sans-serif;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="color:#585858;mso-fareast-language:ZH-TW"><img
style="width:1.802in;height:.7604in"
id="Picture_x0020_3"
src="cid:part1.j00kt6Qr.I0r7aKrJ@gmail.com" class=""
width="173" height="73" border="0"></span><span
style="font-size:12.0pt;font-family:"MS
PGothic",sans-serif;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-top:6.0pt"><b><span
style="font-size:9.5pt;color:#005826;letter-spacing:-.2pt;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW">KUALA
LUMPUR KEPONG BERHAD</span></b><span
style="font-size:12.0pt;font-family:"MS
PGothic",sans-serif;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:95%"><span
style="font-size:9.5pt;line-height:95%;color:#585858;letter-spacing:-.1pt;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW">Wisma
Taiko,</span><span
style="font-size:12.0pt;line-height:95%;font-family:"MS
PGothic",sans-serif;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:95%"><span
style="font-size:9.5pt;line-height:95%;color:#585858;letter-spacing:-.1pt;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW">No.
1, Jalan S.P. Seenivasagam,</span><span
style="font-size:12.0pt;line-height:95%;font-family:"MS
PGothic",sans-serif;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:95%"><span
style="font-size:9.5pt;line-height:95%;color:#585858;letter-spacing:-.1pt;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW">30000
Ipoh,Perak Darul Ridzuan,Malaysia</span><span
style="font-size:12.0pt;line-height:95%;font-family:"MS
PGothic",sans-serif;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="line-height:95%"><b><span
style="font-size:9.5pt;line-height:95%;color:#005826;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW">T
:
</span></b><span
style="font-size:9.5pt;line-height:95%;color:#585858;letter-spacing:-.1pt;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW">+605
240 8000 (ext. 2443)</span><span
style="font-size:12.0pt;line-height:95%;font-family:"MS
PGothic",sans-serif;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW"
lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-top:4.0pt;line-height:85%"><a
href="https://clicktime.symantec.com/15tpDKjABDCCmu4drBEZD?h=4-LzQeEUOcKmp7sCwswGafke694l_dZCDQJ4Rb8N8bc=&u=http://www.klk.com.my/"
moz-do-not-send="true"><span
style="font-size:9.5pt;line-height:85%;color:#585858;mso-fareast-language:ZH-TW;text-decoration:none"><img
style="width:1.052in;height:.1354in"
id="Picture_x0020_19"
src="cid:part2.V03RIXGp.K0cpCJD3@gmail.com" alt="A
close up of a sign
Description automatically generated" class=""
width="101" height="13" border="0"></span></a><a
href="https://clicktime.symantec.com/15tpJ9vSdpsoBqtZPjdhq?h=bX-LFOj0HrSJV_t-3L_WhMP3i5PRx5AtNBaHlI02C7k=&u=http://www.linkedin.com/company/klkberhad"
moz-do-not-send="true"><b><span
style="font-size:9.5pt;line-height:85%;color:#005826;letter-spacing:-.2pt;mso-fareast-language:ZH-TW;text-decoration:none"><img
style="width:.6041in;height:.1354in"
id="Picture_x0020_27"
src="cid:part3.L5Ccwmj2.thWDgHPt@gmail.com" alt="A
close up of a sign
Description automatically generated" class=""
width="58" height="13" border="0"></span></b></a><span
style="font-size:12.0pt;line-height:85%;font-family:"MS
PGothic",sans-serif;mso-ligatures:standardcontextual;mso-fareast-language:ZH-TW"
lang="EN-US"><o:p></o:p></span></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div style="border:none;border-top:solid #E1E1E1
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span
lang="EN-US"> kirk <<a
href="mailto:kirk@nortekresources.com"
moz-do-not-send="true" class="moz-txt-link-freetext">kirk@nortekresources.com</a>>
<br>
<b>Sent:</b> Tuesday, 6 June, 2023 6:09 PM<br>
<b>To:</b> Loke Jian Munn <<a
href="mailto:jm.loke@klk.com.my"
moz-do-not-send="true" class="moz-txt-link-freetext">jm.loke@klk.com.my</a>>;
<a href="mailto:qgis-user@lists.osgeo.org"
moz-do-not-send="true" class="moz-txt-link-freetext">qgis-user@lists.osgeo.org</a><br>
<b>Subject:</b> <o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<div>
<p class="MsoNormal">Hi Loke<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Richard suggested using a NDVI approach
which would require data in the Near Infrared (NIR) band.
An orthomisaic would contain 3 colour bands, but not the
NIR. NDVI provides an understanding of plant greenness
and health and may not be suitable for detecting oil
palm's. <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">If you are getting 90 percent plus with
your current approach , you may find that you will spend 4
times longer capturing the additional 10 percent. <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">NIR data,are available from various
satellite sensors however, their resolution would not work
at the individual plant level.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Some drone sensors record the NIR band.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">Kirk Schmidt<o:p></o:p></p>
</div>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div id="composer_signature">
<div>
<p class="MsoNormal"><span
style="font-size:9.0pt;color:#575757">Sent from my
Galaxy<o:p></o:p></span></p>
</div>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</div>
<br>
DISCLAIMER : This email and any attachments are confidential and
intended solely for the addressee. If you are not the intended
recipient, any disclosure, copying, distribution either whole or
partial, is prohibited and may be unlawful. In such case, please
delete this message and kindly notify the sender. <br>
<b>Kuala Lumpur Kepong Berhad </b>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
<pre class="moz-quote-pre" wrap="">_______________________________________________
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</pre>
</blockquote>
<pre class="moz-signature" cols="72">--
Micha Silver
Ben Gurion Univ.
Sde Boker, Remote Sensing Lab
cell: +972-523-665918</pre>
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