Merge pull request #203 from takluyver/squash-images-pngcrush

Resize and squash images

Author: takluyver

_sections/30-projects.md

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+#!/usr/bin/env bash
+set -e
+
+# pip install pillow
+python3 scripts/thumbnail-images.py
+
+# https://pmt.sourceforge.io/pngcrush/
+# On Mac: brew install pngcrush
+
+# Options:
+#   -ow     Overwrite
+#   -brute  Use brute-force: try 176 different methods
+
+find . -iname '*.png' -exec pngcrush -ow -brute {} \;

assets/adb_enhanced.png

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+#!/usr/bin/env python3
+# encoding: utf-8
+"""
+Thumbnail images to a maximum of 320px wide and 160px high
+"""
+import glob
+
+from PIL import Image  # pip install pillow
+
+max_size = 320, 160
+
+# Exclude these images from thumbnailing
+excludes = ["assets/signac.png"]
+
+for infile in glob.glob("assets/*.png"):
+    if infile in excludes:
+        continue
+    im = Image.open(infile)
+    if im.width <= max_size[0] and im.height <= max_size[1]:
+        continue
+
+    size_before = im.size
+    im.thumbnail(max_size)
+    im.save(infile)
+
+    print(f"Resized {infile} from {size_before} to {im.size}")