possible bug in histogram: in IM 6.4.1-6 Q16 HDRI

[fmw42]

I get nothing listed to the terminal from:

convert rose: -format %c histogram:info:-

and the file histogram.txt is empty if I do

convert rose: -format %c histogram:info:histogram.txt

I even tried with "%c" rather than %c, but got the same results

Am I doing something wrong? If not, would you verify.

Thanks

Fred

[magick]

Did histogram:info:- ever work? We don't recall support for multiple explicit image formats. That is histogram:- and info:- works but not histogram:info:-.

[fmw42]

I believe they did and I used them before. I was going by Anthony's example at:
http://www.imagemagick.org/Usage/files/#histogram


These choke:

convert rose: -format %c histogram:
convert rose: -format %c histogram:-
convert rose: -format "%c" histogram:
convert rose: -format "%c" histogram:-

convert rose: -format "%c" histogram:-
id=ImageMagick version=1.0
class=DirectClass colors=0 matte=False
columns=256 rows=200 depth=8
colorspace=RGB
resolution=72x72
page=256x200+0+0
create-date={2008-06-11T21:56:19-07:00}
modify-date={2008-06-11T21:56:19-07:00}


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[magick]

Hmmm... this works:

• convert tree.gif -format %c histogram:info:-

This doesn't:

• convert rose: -format %c histogram:info:-

ImageMagick is not generating a histogram comment if the number of unique colors exceed 1024. We will remove this restriction in the next release.