Add notes for 2023-05-18

2023-05-18 16:47:51 +03:00 · 2023-05-18 16:47:51 +03:00 · aa5fab70b7
parent d8be9c001c
commit aa5fab70b7
32 changed files with 97 additions and 37 deletions
--- a/content/posts/2023-05.md
+++ b/content/posts/2023-05.md
@ -62,4 +62,28 @@ done < <(csvcut -c 1 ~/Downloads/2023-04-26\ CGIAR\ non-AGROVOC\ subjects.csv |
 - Export the entire CGSpace to check for missing Initiative collection mappings
  - I also adding missing regions

+## 2023-05-16
+
+- I finally cleaned up and published my latest evaluation of [JPEG, WebP, and AVIF](https://alanorth.github.io/improved-dspace-thumbnails/evaluating-jpeg-webp-avif.html)
+  - I [filed an issue on DSpace](https://github.com/DSpace/DSpace/issues/8849) to track this
+
+## 2023-05-17
+
+- Re-sync CGSpace to DSpace 7 Test
+- I came up with a naive patch to use WebP instead of JPEG in the DSpace ImageMagick filter, and it works, but doesn't replace existing JPEGs... hmmm
+  - Also, it does PDF to WebP to WebP haha
+
+## 2023-05-18
+
+- I created a [pull request](https://github.com/DSpace/DSpace/pull/8850) to improve some minor documentation, typo, and logic issues in the DSpace ImageMagick thumbnail filters
+- I realized that there is a quick win to the generation loss issue with ImageMagickThumbnailFilter
+  - We can use ImageMagick's internal MIFF instead of JPEG when writing the intermediate image
+  - According to the [libvips author PNG is very slow](https://github.com/libvips/libvips/issues/571)!
+  - I re-ran my `generation-loss.sh` script using MIFF and found that it had essentially the same results as PNG, which is about 1.1 points higher on the ssimulacra2 (v2.1) scoring scale
+  - Also, according to my tests with the cosmo rusage.com utility, I see that MIFF is indeed much faster than PNG
+  - I updated my pull request to add this quick win
+- Weekly CG Core types meeting
+  - Low attendance so I just kept working on the spreadsheet
+  - We are at the stage of voting on definitions
+
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--- a/docs/2023-05/index.html
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@ -25,7 +25,7 @@ Work on cleaning, proofing, and uploading twenty-seven records for IFPRI to CGSp
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@ -56,9 +56,9 @@ Work on cleaning, proofing, and uploading twenty-seven records for IFPRI to CGSp
  "@type": "BlogPosting",
  "headline": "May, 2023",
  "url": "https://alanorth.github.io/cgspace-notes/2023-05/",
-  "wordCount": "352",
+  "wordCount": "562",
  "datePublished": "2023-05-03T08:53:36+03:00",
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+  "dateModified": "2023-05-12T14:02:55+03:00",
  "author": {
    "@type": "Person",
    "name": "Alan Orth"
@ -201,6 +201,42 @@ Work on cleaning, proofing, and uploading twenty-seven records for IFPRI to CGSp
 </ul>
 </li>
 </ul>
+<h2 id="2023-05-16">2023-05-16</h2>
+<ul>
+<li>I finally cleaned up and published my latest evaluation of <a href="https://alanorth.github.io/improved-dspace-thumbnails/evaluating-jpeg-webp-avif.html">JPEG, WebP, and AVIF</a>
+<ul>
+<li>I <a href="https://github.com/DSpace/DSpace/issues/8849">filed an issue on DSpace</a> to track this</li>
+</ul>
+</li>
+</ul>
+<h2 id="2023-05-17">2023-05-17</h2>
+<ul>
+<li>Re-sync CGSpace to DSpace 7 Test</li>
+<li>I came up with a naive patch to use WebP instead of JPEG in the DSpace ImageMagick filter, and it works, but doesn&rsquo;t replace existing JPEGs&hellip; hmmm
+<ul>
+<li>Also, it does PDF to WebP to WebP haha</li>
+</ul>
+</li>
+</ul>
+<h2 id="2023-05-18">2023-05-18</h2>
+<ul>
+<li>I created a <a href="https://github.com/DSpace/DSpace/pull/8850">pull request</a> to improve some minor documentation, typo, and logic issues in the DSpace ImageMagick thumbnail filters</li>
+<li>I realized that there is a quick win to the generation loss issue with ImageMagickThumbnailFilter
+<ul>
+<li>We can use ImageMagick&rsquo;s internal MIFF instead of JPEG when writing the intermediate image</li>
+<li>According to the <a href="https://github.com/libvips/libvips/issues/571">libvips author PNG is very slow</a>!</li>
+<li>I re-ran my <code>generation-loss.sh</code> script using MIFF and found that it had essentially the same results as PNG, which is about 1.1 points higher on the ssimulacra2 (v2.1) scoring scale</li>
+<li>Also, according to my tests with the cosmo rusage.com utility, I see that MIFF is indeed much faster than PNG</li>
+<li>I updated my pull request to add this quick win</li>
+</ul>
+</li>
+<li>Weekly CG Core types meeting
+<ul>
+<li>Low attendance so I just kept working on the spreadsheet</li>
+<li>We are at the stage of voting on definitions</li>
+</ul>
+</li>
+</ul>
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