<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;">Ipek,<div><br></div><div>It is of course also possible to computationally simulate optical blur in an image from an arbitrary set of wavefront aberrations. We explain how in this paper:<div><br></div><div><p style="margin: 0px 0px 0px 36px; text-indent: -36px; font-style: normal; font-variant-caps: normal; font-stretch: normal; line-height: normal; font-family: "Helvetica Neue"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;">Watson, A. B. (2015). Computing human optical point spread functions. Journal of Vision, 15(2):26, 1-25, http://journalofvision.org/15/2/26/.</p><p style="margin: 0px 0px 0px 36px; text-indent: -36px; font-style: normal; font-variant-caps: normal; font-stretch: normal; line-height: normal; font-family: "Helvetica Neue"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;"><br></p><p style="margin: 0px 0px 0px 36px; text-indent: -36px; font-style: normal; font-variant-caps: normal; font-stretch: normal; line-height: normal; font-family: "Helvetica Neue"; font-size-adjust: none; font-kerning: auto; font-variant-alternates: normal; font-variant-ligatures: normal; font-variant-numeric: normal; font-variant-east-asian: normal; font-variant-position: normal; font-feature-settings: normal; font-optical-sizing: auto; font-variation-settings: normal;">-Beau</p><div><br><blockquote type="cite"><div>On Jun 13, 2023, at 3:06 PM, Oruc, Ipek <ipor@mail.ubc.ca> wrote:</div><br class="Apple-interchange-newline"><div>
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Dear All,
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<div>Thank you for your excellent suggestions Michael, Alexandre, Lawrence, Mike, Curtis, Don, Siddhart, Vince, Tony, Keith, JP, Sergejs, Carlo, Sergio, Jeff, Sven! </div>
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<div>There are many options here for us to try. I’m sure we will find a good solution among these. To summarize the suggestions for physical blurring methods, these were roughly under the main headings of transparent sheet/drafting film/frosted acetate,
optical/refraction lenses, holographic/light shaping/other diffusers, Bangerter filters, and via projector settings.</div>
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<div>Thank you all also for the papers shared. I will highlight two here that were especially helpful in my specific case, one by Heinrich and Strubin (2020) that examines a variety of filters to specify options that degrade acuity while sparing contrast
[1] and another one by Strasburger, Bach & Heinrich (2018) that describe the differences between digital blurring (low-pass filtering) and dioptric blur [2].</div>
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<div>[1] Heinrich, S. P., & Strübin, I. (2020). Use of diffusing filters for artificially reducing visual acuity when testing equipment and procedures. Documenta Ophthalmologica, 140, 83-93.</div>
<div>[2] Strasburger, H., Bach, M., & Heinrich, S. P. (2018). Blur unblurred—a mini tutorial. i-Perception, 9(2), 2041669518765850.</div>
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<div>Best,</div>
<div>Ipek<br>
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<div>________________</div>
<div>Ipek Oruc, PhD (she/her)</div>
<div>Associate Professor<br>
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Department of Ophthalmology & Visual Sciences<br>
University of British Columbia<br>
Rm 4440 - 818 West 10th Avenue<br>
Vancouver, BC V5Z 1M9<br>
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<a href="mailto:ipor@mail.ubc.ca">email: ipor@mail.ubc.ca</a><br>
URL: <a href="http://www.visualcognition.ca/ipek/">http://www.visualcognition.ca/ipek/</a><br>
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