https://pfspipe.ipmu.jp/jira This file is an XML representation of an issue en-us 8.3.4 803005 13-09-2019 https://pfspipe.ipmu.jp/jira/browse/PIPE2D-462 DRP 2-D Pipeline <p>In order to improve the fidelity of simulations, we want to include the ``long-range'' scattering term that we see in the data. Understanding the impact of this scattering is crucial for understanding how well we can extract data from nearby fibers. </p> <p>This ticket is to create the simplest kernel, based on observed scatter in LAM, with which to convolve the data to simulate this effect. At this point I am aiming to create only a single kernel, without any spatial dependence.</p> PIPE2D-462

Create a scattering kernel

Task Normal Done Done ncaplar ncaplar Thu, 10 Oct 2019 15:30:54 +0000 Tue, 15 Oct 2019 19:34:26 +0000 Mon, 14 Oct 2019 21:00:33 +0000 0 1 <p>I have placed the representative scattering kernel at <tt>/tigress/HSC/PFS/sim_Neven/Scattering_Kernel</tt>. This kernel is the median of around 100 examples across the detector. Size is 28x28, where each pixel is the physical pixel (15 microns).</p> <p>Example usage:</p> <blockquote><p>def custom_fftconvolve(array1, array2):<br/> assert array1.shape==array2.shape<br/> return np.fft.fftshift(np.real(np.fft.irfft2(np.fft.rfft2(array1)*np.fft.rfft2(array2))))</p> <p>#convolve the psf with the scattered light kernel in the final resolution space<br/> scattered_light_in_final_image= custom_fftconvolve(final_image_without_scatter,scattering_kernel)</p> <p>#add back the scattering to the image<br/> final_image=final_image_without_scatter+scattered_light_in_final_image</p></blockquote> <p>I am showing the examples of the procedure below:</p> <p><span class="image-wrap" style=""><a id="12201_thumb" href="https://pfspipe.ipmu.jp/jira/secure/attachment/12201/12201_Adding_scattering.png" title="Adding_scattering.png" file-preview-type="image" file-preview-id="12201" file-preview-title="Adding_scattering.png"><img src="https://pfspipe.ipmu.jp/jira/secure/thumbnail/12201/_thumb_12201.png" style="border: 0px solid black" /></a></span></p> Relates PIPE2D-463 Development Rank 0|02qpt6:508yl03z0r Reviewers cloomis Sprint 2DDRP-2019 H Story Points 3.0