convert png to tiff doesn't work properly

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kirafishy
Posts: 2
Joined: 2019-02-15T01:28:16-07:00
Authentication code: 1152

convert png to tiff doesn't work properly

Post by kirafishy » 2019-02-15T01:41:02-07:00

hello everyone,
i want to convert a png file to tiff file, there's some transparent elements in png file, when it converted to tiff file, the colors become grey, I think the problem is tiff file doesn't have alpha channel, I tried convert option -alpha and -channel but failed, how can I convert it properly?
the link below is my example files, include the png file, tiff file and my screenshot shows the difference, thanks!
https://drive.google.com/open?id=12Z_3y ... C8nSJOUFor

kirafishy
Posts: 2
Joined: 2019-02-15T01:28:16-07:00
Authentication code: 1152

Re: convert png to tiff doesn't work properly

Post by kirafishy » 2019-02-15T01:59:11-07:00

wow, when i add option "-define tiff:alpha=unspecified" it works properly!

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