[Qgis-user] Raster calculator

[Jocelyn Le Baut]

Hello everybody,

I have a problem to use the raster calculator. Some pixels of my geotiff
file have the value 255 on the band 1, 2 and 3. I want to replace the value
by 0 on the band 1, 2 and 3 for these pixels.

I have try with this formula but it's not look good :
("test at 1" != 255)+("test at 2" != 255)+("test at 3" != 255) * "test"

[image: test.jpg]
Thanks a lot for the help,

Jocelyn
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