Initial commit

.gitignore

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+/output_im.jpg
+/output_pyvips.jpg

compare.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+time python ./main.py
+
+time convert demo.jpg -virtual-pixel Transparent -distort PerspectiveProjection '0.418385,-0.064912,1.11204e-12,-1.07285e-16,0.407118,1.85136e-13,-0.000143964,-0.0000155811'  output_im.jpg

main.py

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+#!/usr/bin/env python3
+
+import pyvips
+
+image = pyvips.Image.new_from_file("demo.jpg", access="random")
+
+# T = [
+#     0.418385,
+#     -0.064912,
+#     1.11204e-12,
+#     -1.07285e-16,
+#     0.407118,
+#     1.85136e-13,
+#     -0.000143964,
+#     -0.0000155811,
+# ]
+
+T = [
+    2.39014,
+    0.381091,
+    -5.07071e-13,
+    8.09745e-16,
+    2.45629,
+    -1.95474e-12,
+    0.000344095,
+    0.0000931351,
+]
+
+i = pyvips.Image.xyz(image.width, image.height)
+
+x = (i[0] * T[0] + i[1] * T[1] + T[2]) / (i[0] * T[6] + i[1] * T[7] + 1)
+y = (i[0] * T[2] + i[1] * T[4] + T[5]) / (i[0] * T[6] + i[1] * T[7] + 1)
+
+m = x.bandjoin(y)
+
+image = image.mapim(m)
+
+image.write_to_file("./output_pyvips.jpg")