fix: fix a handful of alts for images

.github/workflows/jekyll.yml

@@ -75,7 +75,7 @@ jobs:
         uses: chabad360/htmlproofer@master
         with:
           directory: "./_site"
-          arguments: --assume-extension .html --swap-urls '^https\://e4e.ucsd.edu/:/'
+          arguments: --assume-extension .html --swap-urls '^https\://e4e.ucsd.edu/:'
       - name: Checks files
         run: ls -l cache
       - name: Checks files

_posts/2013-04-22-hold-your-breath-this-is-just-the-beginning.md

@@ -17,13 +17,13 @@ We have been working on some structure from motion algorithms to try to recreate
 
 ## Cannon
 
-![]({{"/assets/2013-04-22-GOPR6293.jpg" | resize: "300x225>"}})
+![GOPR6293]({{"/assets/2013-04-22-GOPR6293.jpg" | resize: "300x225>"}})
 
 ## Onion Jar
-![]({{"/assets/2013-04-22-onionjar_0007.jpg" | resize: "300x225>"}})
+![onionjar_0007]({{"/assets/2013-04-22-onionjar_0007.jpg" | resize: "300x225>"}})
 
 ## Bellarmine Jar
-![]({{"/assets/2013-04-22-image-0014.jpg" | resize: "300x225>"}})
+![bellarmine jar]({{"/assets/2013-04-22-image-0014.jpg" | resize: "300x225>"}})
 
 <!-- ** The links require browser support for WebGL. To see if you have WebGL, please navigate [here](http://get.webgl.org/) -->
 

_posts/2013-07-16-engineers-for-exploration-reu-summer-2013.html

@@ -24,49 +24,49 @@
 </div>
 
 <div class="floatclearfix">
-    <p><a href="{{"/assets/2013-07-16-gabrielle.jpg" | resize: "180x240>"}}"><img class="alignleft" src="{{"/assets/2013-07-16-gabrielle.jpg" | resize: "180x240>"}}"></a></p>
+    <p><a href="{{"/assets/2013-07-16-gabrielle.jpg" | resize: "180x240>"}}"><img alt="gabrielle" class="alignleft" src="{{"/assets/2013-07-16-gabrielle.jpg" | resize: "180x240>"}}"></a></p>
     <p><strong>Gabrielle Trotter, University of Pennsylvania</strong></p>
     <p>Gabrielle is a rising senior at the University of Pennsylvania, where she is studying Electrical Engineering and Computer Science. She is from Massachusetts, and in her free time she enjoys cooking and practicing yoga.This summer during the E4E REU, she is working as part of the camera trap team.</p>
 </div>
 
 <div class="floatclearfix">
-    <p><a href="{{ "/assets/2013-07-16-davidf.png" | resize: "180x240>"}}"><img class="alignright" src="{{ "/assets/2013-07-16-davidf.png" | resize: "180x240>"}}"></a></p>
+    <p><a href="{{ "/assets/2013-07-16-davidf.png" | resize: "180x240>"}}"><img alt="davidf" class="alignright" src="{{ "/assets/2013-07-16-davidf.png" | resize: "180x240>"}}"></a></p>
     <p><strong>David Fish, San Diego State University</strong></p>
     <p>David Fish is entering his 3<sup>rd</sup> year as a Civil Engineering student at San Diego State University. David is participating in the Engineers for Exploration program at UC San Diego as a member of the Intelligent Camera Trap team. He is working on the system's housing, weatherproofing and the driver gears. David is a Marine Corps veteran with experience in helicopter airframe fabrication.</p>
 </div>
 
 <div class="floatclearfix">
-    <p><a href="{{ '/assets/2013-07-16-mike.jpg' | resize: '180x240>'}}"><img class="alignleft" src="{{ '/assets/2013-07-16-mike.jpg' | resize: '180x240>'}}"></a></p>
+    <p><a href="{{ '/assets/2013-07-16-mike.jpg' | resize: '180x240>'}}"><img alt="mike" class="alignleft" src="{{ '/assets/2013-07-16-mike.jpg' | resize: '180x240>'}}"></a></p>
     <p><strong>Michael Carlson, Arizona State University</strong></p>
     <p>Michael Carlson is entering his third year as a Computer Science - Software Engineering student at Arizona State University. Prior to the E4E REU project, Michael spent two semesters working on the Arizona Space Grant sponsored Arizona Near Space Research weather balloon project. He has also worked as a Computer Science tutor for four semesters. Michael plans to explore more research opportunities when he returns to ASU in the fall.</p>
 </div>
 
 <div class="floatclearfix">
-    <p><a href="{{'/assets/2013-07-16-lauren.jpg' | resize: '180x240>'}}"><img class="alignright" src="{{'/assets/2013-07-16-lauren.jpg' | resize: '180x240>'}}"></a></p>
+    <p><a href="{{'/assets/2013-07-16-lauren.jpg' | resize: '180x240>'}}"><img  alt="lauren" class="alignright" src="{{'/assets/2013-07-16-lauren.jpg' | resize: '180x240>'}}"></a></p>
     <p><strong>Lauren Nishizaki, Harvey Mudd College</strong></p>
     <p>Lauren Nishizaki is a rising senior at Harvey Mudd College. Although she primarily studies computer engineering, Lauren also enjoys dabbling in electrical engineering and control systems as well as making things in the machine shop. This summer, she is working on the aerial radio collar tracker. In some of her recent projects, she helped investigate and test novel control algorithms for Eaton Aerospace and collaborated with a team to design and build a combat robot.</p>
 </div>
 
 <div class="floatclearfix">
-    <p><a href="{{'/assets/2013-07-16-jeremy.png' | resize: '180x240>'}}"><img class="alignleft" src="{{'/assets/2013-07-16-jeremy.png' | resize: '180x240>'}}"></a></p>
+    <p><a href="{{'/assets/2013-07-16-jeremy.png' | resize: '180x240>'}}"><img alt="jeremy" class="alignleft" src="{{'/assets/2013-07-16-jeremy.png' | resize: '180x240>'}}"></a></p>
     <p><strong>Jeremy Blackstone, Howard University</strong></p>
     <p>Jeremy Blackstone is entering his 4th years as a Systems and Computer Science student at Howard University. This summer Jeremy is participating in the UC San Diego STARS program working with students in the Engineers for Exploration program working on the tiger camera trap. Some of his past experiences include contributing to the research paper "DDoS and Other Anomalous Web Traffic Behavior in Selected Countries" as a part of the GEAR-UP program in Santiago, Chile and working in the Web Applications Services group in the IT department of Phillips 66.</p>
 </div>
 
 <div class="floatclearfix">
-    <p><a href="{{'/assets/2013-07-16-davidm.jpg' | resize: '180x240>'}}"><img class="alignright" src="{{'/assets/2013-07-16-davidm.jpg' | resize: '180x240>'}}"></a></p>
+    <p><a href="{{'/assets/2013-07-16-davidm.jpg' | resize: '180x240>'}}"><img alt="davidm" class="alignright" src="{{'/assets/2013-07-16-davidm.jpg' | resize: '180x240>'}}"></a></p>
     <p><strong>David Muller, University of California San Diego</strong></p>
     <p>This fall, David Muller will be a senior at UCSD majoring in Computer Science with a Specialization in Bioinformatics. This summer, he'll be spending his time with E4E developing an algorithm to track animals using a low-cost thermal sensor running on an even lower-cost micro controller. He enjoys soccer, biking, and Riley's thoughts on the "future of shoes."</p>
 </div>
 
 <div class="floatclearfix">
-    <p><a href="{{'/assets/2013-07-16-riley.jpg' | resize: '180x240>'}}"><img class="alignleft" src="{{'/assets/2013-07-16-riley.jpg' | resize: '180x240>'}}"></a></p>
+    <p><a href="{{'/assets/2013-07-16-riley.jpg' | resize: '180x240>'}}"><img alt="riley" class="alignleft" src="{{'/assets/2013-07-16-riley.jpg' | resize: '180x240>'}}"></a></p>
     <p><strong>Riley Yeakle, University of California San Diego</strong></p>
     <p>Riley is entering his 4th year as an Electrical Engineering student at UC San Diego. This summer Riley will continue as a student leader in the Engineers for Exploration program, leading the terrestrial camera trap based projects as well as offering unsolicited advice to other project teams. Some of his past projects include development on the National Geographic Crittercam, and of course, the Intelligent Camera Trap.</p>
 </div>
 
 <div class="floatclearfix">
-    <p><a href="{{'/assets/2013-07-16-perry.jpg' | resize: '180x240>'}}"><img class="alignright" src="{{'/assets/2013-07-16-perry.jpg' | resize: '180x240>'}}"></a></p>
+    <p><a href="{{'/assets/2013-07-16-perry.jpg' | resize: '180x240>'}}"><img alt="perry" class="alignright" src="{{'/assets/2013-07-16-perry.jpg' | resize: '180x240>'}}"></a></p>
     <p><strong>Perry Naughton, University of California San Diego</strong></p>
     <p>Perry Naughton is entering his second year of graduate school at UCSD. Naughton's research interests involve signal processing in underwater environments. This summer he is leading the AUV team, aiding in ecological and archaeological surveying.</p>
 </div>

_posts/2013-08-14-balloon-test-in-warren-mall.md

@@ -16,46 +16,46 @@ post_format:
 This summer, we've been hard at work redesigning the stabilized aerial camera platform. In our past tests towing the balloon from a boat to survey marine wildlife, the gimbal was not able to move quickly enough to counteract strong gusting motions, and the rigging prevented the balloon's sail from deploying completely. To improve the stability of the balloon platform, we switched to a new gimbal that is lighter and better balanced, which reduces the work that the servos need to do. This means that the servos will be able to provide faster response than the previous gimbal and stabilize more effectively, which is critical to getting good imagery when tethered to the back of a bobbing boat. In addition, we rewrote the stabilization code from the ground up to allow more tuning options and new features, such as autofocus control or the addition of other sensors. Finally, we redid the rigging so the gimbal would now be held at a skewed angle, which would prevent the sail from deploying. The sail is crucial for maintaining stability in windy conditions, as it prevents the balloon from spinning out of control. With all these new improvements, we sent up the balloon to see how it'd fare.
 
 <figure>
-<a href="{{'/assets/2013-08-14-rigging.jpg' | absolute_url}}"><img src="{{'/assets/2013-08-14-rigging.jpg' | resize: '670x448>'}}"></a>
+<a href="{{'/assets/2013-08-14-rigging.jpg' | absolute_url}}"><img src="{{'/assets/2013-08-14-rigging.jpg' | resize: '670x448>'}}" alt="Contemplating balloon gimbal rigging"></a>
 <figcaption>
 Contemplating balloon gimbal rigging
 </figcaption>
 </figure>
 
 <figure>
-<a href="{{'/assets/2013-08-14-gimbal.jpg' | absolute_url}}"><img src="{{'/assets/2013-08-14-gimbal.jpg' | resize: '670x448>'}}"></a>
+<a href="{{'/assets/2013-08-14-gimbal.jpg' | absolute_url}}"><img src="{{'/assets/2013-08-14-gimbal.jpg' | resize: '670x448>'}}" alt="The gimbal"></a>
 <figcaption>
 The gimbal
 </figcaption>
 </figure>
 
 <figure>
-<a href="{{'/assets/2013-08-14-eric-nathan-balloon.jpg' | absolute_url}}"><img src="{{'/assets/2013-08-14-eric-nathan-balloon.jpg' | resize: '670x448>'}}"></a>
+<a href="{{'/assets/2013-08-14-eric-nathan-balloon.jpg' | absolute_url}}"><img src="{{'/assets/2013-08-14-eric-nathan-balloon.jpg' | resize: '670x448>'}}" alt="Preparing to send up the balloon (note the properly deployed sail!)"></a>
 <figcaption>
 Preparing to send up the balloon (note the properly deployed sail!)
 </figcaption>
 </figure>
 
 <figure>
-<a href="{{'/assets/2013-08-14-balloon-away.jpg' | absolute_url}}"><img src="{{'/assets/2013-08-14-balloon-away.jpg' | resize: '670x448>'}}"></a>
+<a href="{{'/assets/2013-08-14-balloon-away.jpg' | absolute_url}}"><img src="{{'/assets/2013-08-14-balloon-away.jpg' | resize: '670x448>'}}" alt="Up, up, and away!"></a>
 <figcaption>
 Up, up, and away!
 </figcaption>
 </figure>
 
 The weather was great, the equipment worked, and we were able to get some fantastic imagery from the balloon. While controlling the gimbal and camera through the live video feed, we noted that the video was quite stable, though occasionally there were small disturbances. However, this corresponded with the more powerful wind gusts, which resulted in extreme gimbal motion, so in that light, the stabilization worked very well.
 
-[![]({{'/assets/2013-08-14-warren_mall.jpg' | resize: '150x150'}})]({{'/assets/2013-08-14-warren_mall.jpg' | absolute_url}})
-[![]({{'/assets/2013-08-14-price-center-1.jpg' | resize: '150x150'}})]({{'/assets/2013-08-14-price-center-1.jpg' | absolute_url}})
-[![]({{'/assets/2013-08-14-geisel.jpg' | resize: '150x150'}})]({{'/assets/2013-08-14-geisel.jpg' | absolute_url}})
+[![SME]({{'/assets/2013-08-14-warren_mall.jpg' | resize: '150x150'}})]({{'/assets/2013-08-14-warren_mall.jpg' | absolute_url}})
+[![PC]({{'/assets/2013-08-14-price-center-1.jpg' | resize: '150x150'}})]({{'/assets/2013-08-14-price-center-1.jpg' | absolute_url}})
+[!["Snake Path"]({{'/assets/2013-08-14-geisel.jpg' | resize: '150x150'}})]({{'/assets/2013-08-14-geisel.jpg' | absolute_url}})
 
-[![]({{'/assets/2013-08-14-house.jpg' | resize: '150x150'}})]({{'/assets/2013-08-14-house.jpg' | absolute_url}})
-[![]({{'/assets/2013-08-14-house-side.jpg' | resize: '150x150'}})]({{'/assets/2013-08-14-house-side.jpg' | absolute_url}})
-[![]({{'/assets/2013-08-14-price-center-courtyard.jpg' | resize: '150x150'}})]({{'/assets/2013-08-14-price-center-courtyard.jpg' | absolute_url}})
+[!["Jacobs"]({{'/assets/2013-08-14-house.jpg' | resize: '150x150'}})]({{'/assets/2013-08-14-house.jpg' | absolute_url}})
+[!["Fallen Star"]({{'/assets/2013-08-14-house-side.jpg' | resize: '150x150'}})]({{'/assets/2013-08-14-house-side.jpg' | absolute_url}})
+[!["Warren Bear Courtyard"]({{'/assets/2013-08-14-price-center-courtyard.jpg' | resize: '150x150'}})]({{'/assets/2013-08-14-price-center-courtyard.jpg' | absolute_url}})
 
 As we've done previously, we created a high resolution panoramic by stitching together individual photos. This provides a very wide field of view as well as lots of detail when zooming in, which is ideal for analyzing aerial surveys.
 
-![]({{'/assets/2013-07-30-gigapan.png' | absolute_url}})
+![gigapan]({{'/assets/2013-07-30-gigapan.png' | absolute_url}})
 
 In addition to the DSLR mounted on the gimbal, we attached a GoPro Hero 3 Black to the T-frame to see how the stabilization was working, as well as test the new GoPro's performance as payload for the balloon. Due to the wide field of view, the angular disturbances from the wind gusting is less apparent, which is ideal for an unstabilized camera.
 

_posts/2013-08-22-balloon-test-at-sea.md

@@ -12,31 +12,31 @@ categories:
 One of the main intended uses of the Stabilized Aerial Camera Platform is to perform surveys of marine mammals. After a successful deployment in Warren Mall, we were ready to test the new setup at sea. Our goals for this deployment were to test the effectiveness of a polarizing filter in getting clear photos of underwater animals, and to validate gimbal stabilization while subjected to jerkiness from the bobbing boat.
 
 <figure>
-<a href="{{'/assets/2013-08-22-img02.jpg' | absolute_url}}"><img src="{{'/assets/2013-08-22-img02.jpg' | resize: '640x480'}}"></a>
+<a href="{{'/assets/2013-08-22-img02.jpg' | absolute_url}}"><img src="{{'/assets/2013-08-22-img02.jpg' | resize: '640x480'}}" alt="Inflating the balloon"></a>
 <figcaption>Inflating the balloon</figcaption>
 </figure>
 
 <figure>
-<a href="{{'/assets/2013-08-22-img03.jpg' | absolute_url}}"><img src="{{'/assets/2013-08-22-img03.jpg' | resize: '640x480'}}"></a>
+<a href="{{'/assets/2013-08-22-img03.jpg' | absolute_url}}"><img src="{{'/assets/2013-08-22-img03.jpg' | resize: '640x480'}}" alt="Walking the balloon to the boat"></a>
 <figcaption>Walking the balloon to the boat</figcaption>
 </figure>
 
 <figure>
-<a href="{{'/assets/2013-08-22-img04.jpg' | absolute_url}}"><img src="{{'/assets/2013-08-22-img04.jpg' | resize: '640x480'}}"></a>
+<a href="{{'/assets/2013-08-22-img04.jpg' | absolute_url}}"><img src="{{'/assets/2013-08-22-img04.jpg' | resize: '640x480'}}" alt="Heading out to sea"></a>
 <figcaption>Heading out to sea</figcaption>
 </figure>
 
 For this deployment, we were joined by Dr. Brent Stewart of Hubbs SeaWorld Research Institute who wants to use the camera platform for a variety of aerial surveys, and our captains Jim Antrim and Robert Vincent. After securing the balloon to the back of the boat, we set out to sea. Conditions were favorable, with 3-4 foot swells and 10 mph winds. On our way out, we saw a few dolphins pass the boat, but not enough to warrant sending up the balloon; they would be long gone by the time the balloon could be deployed. After about an hour of unsuccessful searching for a sizeable pod of dolphins, we headed up the coast to check out the kelp forest near La Jolla.
 
 The kelp forest provided us with the opportunity to photograph objects below the surface of the water. We used this to test the effectiveness of the polarizing filter, which reduces reflections and glare from the ocean's surface. The filter is most effective when the polarization of the incident light is perpendicular with the polarization of the filter, and decreases in effectiveness as the polarizations align. The following two pictures were taken of the same patch of kelp from different angles; there is a noticeable improvement in visibility when the filter is working effectively.
 
-[![]({{'/assets/2013-08-22-img06.jpg' | resize: '200x300'}})]({{'/assets/2013-08-22-img06.jpg' | absolute_url}})
-[![]({{'/assets/2013-08-22-img07.jpg' | resize: '200x300'}})]({{'/assets/2013-08-22-img07.jpg' | absolute_url}})
+[![ocean1]({{'/assets/2013-08-22-img06.jpg' | resize: '200x300'}})]({{'/assets/2013-08-22-img06.jpg' | absolute_url}})
+[![ocean2]({{'/assets/2013-08-22-img07.jpg' | resize: '200x300'}})]({{'/assets/2013-08-22-img07.jpg' | absolute_url}})
 
 Since we didn't get to see marine mammals while out at sea, we went by the bait barge and photographed the sea lions there.
 
 <figure>
-<a href="{{'/assets/2013-08-22-img09.jpg' | absolute_url}}"><img src="{{'/assets/2013-08-22-img09.jpg' | resize: '640x480'}}"></a>
+<a href="{{'/assets/2013-08-22-img09.jpg' | absolute_url}}"><img src="{{'/assets/2013-08-22-img09.jpg' | resize: '640x480'}}" alt="Sea lions on the bait barge"></a>
 <figcaption>Sea lions on the bait barge</figcaption>
 </figure>