[Magick-bugs] Regression regarding 16-bit grayscale DPX files
Alan Hagge
Alan.Hagge at warnerbros.com
Wed Jan 16 14:25:48 PST 2008
duc.sequere.aut.de.via.decede at imagemagick.org wrote:
>> but "identify" thinks the image is in Log colorspace, not Grayscale
>>
>
> You will need to remind us what the problem is and post a URL to an image
> we can download to reproduce the problem.
>
OK. A description of the problem follows. I have a sample image (a 4k
grayscale image containing a large letter "Y"), but I don't have a site
to download it from. Is there a site that I can upload it to?
Here's the problem, from my prior e-mail. The display problem has was
corrected as a result of my original e-mail, but identify -verbose still
gives the incorrect colospace (note that the info below is from a
different DPX file, but generated the same way. It's proprietary, so I
can't send it).
>From my prior e-mail:
Somewhere between version 6.2.9-1 and the current version (6.3.4-9), a
regression seems to have occurred regarding 16-bit grayscale DPX files.
I'd reported the problem back in August of 2006 (see
http://www.imagemagick.org/pipermail/magick-bugs/2006-August/002488.html
) and the problem was fixed shortly thereafter
(http://www.imagemagick.org/pipermail/magick-bugs/2006-August/002489.html
). We've been using the 6.2.9-1 release for about 6 months and wanted
to upgrade, but this regression is stopping us.
Is there any chance that this can be investigated and re-addressed?
Thanks,
Alan
P.S. Here's identify -verbose info from both versions:
6.2.9-1 (displays correctly):
Image: 128543.dpx
Format: DPX (SMPTE 268M-2003 (DPX))
Class: DirectClass
Geometry: 4096x3112
Type: Grayscale
Endianess: MSB
Colorspace: Gray
Channel depth:
Gray: 16-bit
Channel statistics:
Gray:
Min: 0 (0)
Max: 65535 (1)
Mean: 36366.1 (0.554911)
Standard deviation: 22168.1 (0.338264)
Colors: 1024
Rendering intent: Undefined
Resolution: 72x72
Units: Undefined
Filesize: 16.2734mb
Interlace: None
Background color: white
Border color: #DFDFDFDFDFDF
Matte color: grey74
Transparent color: black
Page geometry: 4096x3112+0+0
Dispose: Undefined
Iterations: 0
Compression: Undefined
Orientation: TopLeft
Comment: Project name
Copyright: Copyright info
Document: Image filename
Dpx:file.copyright: Copyright info
Dpx:file.creator: Creator
Dpx:file.ditto.key: 1
Dpx:file.filename: Image filename
Dpx:file.project: Project name
Dpx:file.tilestamp: 2006:12:21:03:03:02
Dpx:file.version: V1.0
Dpx:film.format: 004F
Dpx:image.orientation: 0
Dpx:orientation.device: SPIRIT-4K DATACINE
Dpx:orientation.serial: 00105
Dpx:television.time.code: 01:29:15:23
Dpx:user.id: Thomson BTS
Signature:
aeb967966311e95a97d215006bc5e2e26d95361c81ffba74aa94d8d181853577
Software: Creator
Tainted: False
Version: ImageMagick 6.2.9 08/31/06 Q16 http://www.imagemagick.org
6.3.4-0 (displays incorrectly):
Image: 128543.dpx
Format: DPX (SMPTE 268M-2003 (DPX 2.0))
Class: DirectClass
Geometry: 4096x3112+0+0
Type: TrueColor
Endianess: MSB
Colorspace: Log
Channel depth:
Red: 16-bit
Green: 16-bit
Blue: 16-bit
Channel statistics:
Red:
Min: 0 (0)
Max: 65535 (1)
Mean: 25150.8 (0.383776)
Standard deviation: 19849.9 (0.30289)
Green:
Min: 0 (0)
Max: 65535 (1)
Mean: 25150.8 (0.383776)
Standard deviation: 19849.9 (0.30289)
Blue:
Min: 0 (0)
Max: 65535 (1)
Mean: 25150.8 (0.383776)
Standard deviation: 19849.9 (0.30289)
Colors: 1024
Histogram:
23073: ( 320, 320, 320) #014001400140
rgb(0.488289%,0.488289%,0.488289%)
107498: ( 0, 0, 0) #000000000000 black
13069: ( 384, 384, 384) #018001800180
rgb(0.585946%,0.585946%,0.585946%)
66561: ( 256, 256, 256) #010001000100
rgb(0.390631%,0.390631%,0.390631%)
569031: ( 192, 192, 192) #00C000C000C0
rgb(0.292973%,0.292973%,0.292973%)
921383: ( 128, 128, 128) #008000800080
rgb(0.195315%,0.195315%,0.195315%)
74865: ( 64, 64, 64) #004000400040
rgb(0.0976577%,0.0976577%,0.0976577%)
.
. (lots of additional histogram values omitted for brevity)
.
Rendering intent: Undefined
Resolution: 72x72
Units: Undefined
Filesize: 16.2734mb
Interlace: None
Background color: white
Border color: rgb(223,223,223)
Matte color: grey74
Transparent color: black
Page geometry: 4096x3112+0+0
Dispose: Undefined
Iterations: 0
Compression: Undefined
Orientation: TopLeft
Comment: Project name
Copyright: Copyright info
Document: Image filename
Dpx:file.copyright: Copyright info
Dpx:file.creator: Creator
Dpx:file.ditto.key: 1
Dpx:file.filename: Image filename
Dpx:file.frame_position: 128543
Dpx:file.held_count: 1
Dpx:file.project: Project name
Dpx:file.timestamp: 2006:12:21:03:03:02
Dpx:file.version: V1.0
Dpx:film.format: 004F
Dpx:film.shutter_angle: nan
Dpx:image.orientation: 0
Dpx:orientation.device: SPIRIT-4K DATACINE
Dpx:orientation.serial: 00105
Dpx:orientation.x_center: nan
Dpx:orientation.y_center: nan
Dpx:television.black_gain: nan
Dpx:television.black_level: nan
Dpx:television.break_point: nan
Dpx:television.field_number: 255
Dpx:television.frame_rate: nan
Dpx:television.gamma: nan
Dpx:television.horizontal_sample_rate: nan
Dpx:television.integration_times: nan
Dpx:television.interlace: 255
Dpx:television.padding: 255
Dpx:television.time.code: 01:29:15:23
Dpx:television.time_offset: nan
Dpx:television.user.bits: 00:00:00:00
Dpx:television.vertical_sample_rate: nan
Dpx:television.video_signal: 255
Dpx:television.white_level: nan
Dpx:user.id: Thomson BTS
Signature:
f04e7f06ba00562c2c94df833ed6c83e358f367b6c0c09658c2d58a0772320e0
Software: Creator
Profile-dpx:user.data: 63108 bytes
Tainted: False
User time: 0.760u
Elapsed time: 0:02
Pixels per second: 12.1562mb
Version: ImageMagick 6.3.4 06/14/07 Q16 http://www.imagemagick.org
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