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authorTianjie Xu <xunchang@google.com>2016-08-03 10:25:00 +0200
committerTianjie Xu <xunchang@google.com>2016-08-03 19:17:11 +0200
commit1123fafd0174db72897ff2ca27e72e1c7412318f (patch)
tree08d467c1d4ec75edb91434eaeafad2852d28b73c /tools/recovery_l10n
parentMerge "Clean up verifier testcases." (diff)
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-rw-r--r--tools/recovery_l10n/README.md2
1 files changed, 2 insertions, 0 deletions
diff --git a/tools/recovery_l10n/README.md b/tools/recovery_l10n/README.md
index bf41ff241..1554f6618 100644
--- a/tools/recovery_l10n/README.md
+++ b/tools/recovery_l10n/README.md
@@ -25,6 +25,8 @@
* "pngcrush -c 0 ..." converts "text-out.png" into a 1-channel image,
which is accepted by Recovery. This also compresses the image file by
~60%.
+ * zopflipng could further compress the png files by ~10%, more details
+ in https://github.com/google/zopfli/blob/master/README.zopflipng
* If you're using other png compression tools, make sure the final text
image works by running graphic tests under the recovery mode.