background not full white in image created by convert

[whennings]

Hello all,
when CONVERTing an eps file (b&w) to png, the background is 245,254,254 which is not fully white.
Directly calling ghostscript creates a fully white backgroung (255,255,255)
I already tried specifying -background "#ffffff" but this doesn't help.
This occurs with ImageMagick-6.4.2-1-Q8-windows-dll.exe
Using ImageMagick-6.3.6-10-Q8-windows-dll.exe worked well.

[magick]

Post a URL to a test image. We tried a couple of EPS to PNG conversions and got the expected 255 white value.

[whennings]

Post a URL to a test image. We tried a couple of EPS to PNG conversions and got the expected 255 white value.

Here it is:
http://freenet-homepage.de/wh_ew/test/

[magick]

The problem you posted is a bug in the pngalpha Ghostscript device. Try this command:

gs -q -dQUIET -dPARANOIDSAFER -dBATCH -dNOPAUSE -dNOPROMPT -dMaxBitmap=500000000 -dAlignToPixels=0 -dGridFitTT=0 "-sDEVICE=pngalpha" -dTextAlphaBits=4 -dGraphicsAlphaBits=4 "-r300x300" -g79x42 -sOutputFile=test.png l2r_0001.eps

Test.png has a maximum value of 254. You can edit delegates.xml and change the pngalpha device to pnmraw to fix the problem but then you lose the ability to render transparent EPS images.

[whennings]

The problem you posted is a bug in the pngalpha Ghostscript device.

Thank you very much!
I just posted a bug report on the Ghostscript bug tracker.