Hi, all<div><br></div><div><p style="margin-top:7.5pt;margin-right:0cm;margin-bottom:7.5pt;margin-left:
0cm;line-height:13.0pt"><span lang="EN-US" style="font-size:10.0pt;font-family:
Helvetica;color:black">In this week, I begin to implement the function for
star brightness measurement.</span></p>
<p style="margin-top:7.5pt;margin-right:0cm;margin-bottom:7.5pt;margin-left:
0cm;line-height:13.0pt"><span lang="EN-US" style="font-size:10.0pt;font-family:
Helvetica;color:black">To measure the brightness of a star, we need to determine the aperture and outer radius. We automatically calculate the radius based on the mean value fluctuation. Once the radius are computed, we can calculate the brightness of the star and the background sky. </span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:Helvetica;
color:black"> </span></p>
<p class="MsoNormal"><span lang="EN-US">Currently I implement an interface that
displays current image. The user can select a certain star in the image. When
the user selects a star, the inner radius and outer radius will be
automatically computed as stated above and shown around the star. The values of
the aperture and sky radius are also shown in the dialog and the user can
manually modify them. Once they are modified, the new radius will be
automatically shown around the star. The x, y coordinates of the star will also
be shown on the right of the dialog</span></p><p class="MsoNormal"><span lang="EN-US"><br></span></p><p class="MsoNormal"><span lang="EN-US">Detailed report can be found at: </span><a href="http://opticks.org/confluence/display/~yiwei/Status+Report+for+Week+10%2C+GSoC+2011">http://opticks.org/confluence/display/~yiwei/Status+Report+for+Week+10%2C+GSoC+2011</a></p>
<p class="MsoNormal"><br></p><p class="MsoNormal">Next week I am going to f<span class="Apple-style-span" style="font-family: Helvetica, Arial, sans-serif; font-size: 13px; line-height: 17px; ">inish the implementation of star brightness measurement. Complete the calculation for background sky brightness and subtract then from the aperture to get final star brightness. Add functions to automatically modify the center of the star. And functions to compute both single star brightness measurement and relative brightness measurement for two stars</span></p>
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