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fix the cover of rgb2gray demo #147

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Jul 1, 2020
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fix the cover of rgb2gray demo #147

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5 changes: 3 additions & 2 deletions docs/examples/color_channels/rgb_grayscale.jl
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
# ---
# title: RGB to GrayScale
# cover: assets/rgb_grayscale.png
# cover: assets/rgb_grayscale.gif
# ---

# This example illustrates RGB to Grayscale Conversion
Expand All @@ -19,4 +19,5 @@ mosaicview(rgb_image, gray_image; nrow = 1)
# [Rec. ITU-R BT.601-7](https://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.601-7-201103-I!!PDF-E.pdf) rounding off to 3 decimal places
# `0.299 * R + 0.587 * G + 0.114 * B`

save("assets/rgb_grayscale.png", gray_image) #src
using ImageMagick #src
ImageMagick.save("assets/rgb_grayscale.gif", cat(rgb_image, RGB.(gray_image); dims=3); fps=1) #src