[Koha-bugs] [Bug 21987] Local cover 'thumbnail' size is bigger than 'imagefile' size in biblioimages table

[bugzilla-daemon at bugs.koha-community.org]

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=21987

--- Comment #1 from Andreas Roussos <arouss1980 at gmail.com> ---
Here's some more info from tests I conducted earlier:

Original image              -> Koha imagefile  Koha thumbnail
---------------------------    --------------  --------------
aliakmon 160x245 24-bit JPG -> 160x245  8-bit  140x214 24-bit
aliakmon 601x801 24-bit JPG -> 600x800 24-bit  140x187 24-bit

oatrotf  599x799 32-bit PNG -> 599x799  8-bit  140x187 24-bit
oatrotf  601x801 32-bit PNG -> 600x800 24-bit  140x187 24-bit

testing  200x400  8-bit GIF -> 200x400  8-bit  140x280 24-bit
testing  601x801  8-bit GIF -> 600x800 24-bit  140x187 24-bit

whitebg  599x799 24-bit PNG -> 599x799  1-bit  140x187 24-bit *
whitebg  601x801 24-bit PNG -> 600x800 24-bit  140x187 24-bit

worrying 599x799  8-bit PNG -> 599x799  8-bit  140x187 24-bit
worrying 601x801  8-bit PNG -> 600x800 24-bit  140x187 24-bit

[*] the uploaded image was empty (white background), perhaps
    that explains the resulting 1-bit imagefile?

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