pfsinimgmagick(1)pfsinimgmagick(1)NAMEpfsinimgmagick - Load images or frames using ImageMagick++ library
SYNOPSISpfsinimgmagick (<file> [--linear] [--absolute <max_lum>] [--frames
<range>] [--skip-missing]) [<file>...]
DESCRIPTION
This command can load images or frames in the multitude of image for‐
mats supported by the ImageMagick library. This includes but is not
limited to: BMP, JPG, PNG, GIF, EPS, TIFF, DPX. See the manual page of
ImageMagick for the full list of available formats.
pfsinimgmagick reads images or frames from files and writes pfs stream
to the Standard Output. The pfs stream is usually piped to another pro‐
gram for further processing. To detect the format automatically based
on the extension, use pfsin command.
The output of pfsinimgmagick is scaled to 0-1 range, unless '--abso‐
lute' option is specified. By default, the 'LUMINANCE' tag is set to
'DISPLAY' contents. Using the '--linear' switch you can force the
inverse sRGB transformation to provide linear data. In this case the
'LUMINANCE' tag is set to 'RELATIVE' contents. '--absolute' switch can
be used to convert pixels to absolute luminance values.
This command handles properly 'alpha' channel (transparency) stored in
images.
Each file can contain a %d pattern, which is substituted with frame
numbers. The pattern has the same syntax as C printf command. For exam‐
ple, you can use %04d to make the frame number four digit with proceed‐
ings zeros. You can select the frames using the following options (the
options must be always given after the file name):
--frames <range>
Range is given in mathlab / octave format:
startframe:step:endframe
Frame numbers start with startframe (default 0), are increased
by step (default 1) and stop at endframe You can skip one of
those values, for example 1:100 for frames 1,2,...,100 and 0:2:
for frame 0,2,4,... up to the last file that exists.
--skip-missing
Skip up to ten frames in a row if corresponding files are miss‐
ing. Otherwise the program stops reading sequence at the first
file that does not exists. This switch does not apply to the
first frame in a sequence. This switch can be useful if there is
a rendered animation where some of the frame has not been gener‐
ated.
--linear, -l
Converts pixel values to linear luminance (XYZ), assuming the
sRGB color space for the input image. The maximum pixel value
(255,255,255) is mapped to Y=1. LUMINANCE tag is set to RELA‐
TIVE.
--absolute <max_lum>, -a <max_lum>
--absolute converts pixel values to an absolute linear luminance
(XYZ), that is the color space, in which channel Y contains
luminance given in cd/m^2. The sRGB color space is assumed for
the input image. The maximum pixel value (255,255,255) is mapped
to Y=<max_lum>. <max_lum> is typically set to 80 [cd/m^2] for a
CRT monitor. LUMINANCE tag is set to ABSOLUTE. --absolute
process images almost the same as --relative, but additionally
it scales all pixels by <max_lum>.
EXAMPLESpfsinimgmagick frame%04d.dpx --frames 0:10 | pfsview
Read frames from files frame0000.dpx, frame0001.dpx, ...,
frame0010.dpx and show them using pfsview.
BUGSpfsinimgmagick can not read frames from the Standard Input.
Please report bugs and comments on implementation to the discussion
group http://groups.google.com/group/pfstools
SEE ALSOpfsin(1), pfsout(1)ImageMagick(1)pfsinimgmagick(1)
