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+# Scan line of image 42049
+
+This is a "scan line", a horizontal slice, from a grayscale image from the
+BSD300 dataset. The image and the exact index of the scan line have been
+selected because of the abrupt changes between black and white that occur.
+
+As it is not clear whether the BSD300 images can be redistributed freely, we
+download the image from the internet archive instead.
+
+![Plot of scanline_42049 dataset](./scanline_42049.png)