NAME¶
pfsinimgmagick - Load images or frames using ImageMagick++ library
SYNOPSIS¶
pfsinimgmagick (<file> [--linear] [--absolute <max_lum>]
[--frames <range>] [--skip-missing]) [<file>...]
DESCRIPTION¶
This command can load images or frames in the multitude of image formats
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 program 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 '--absolute'
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 example, you can
use %04d to make the frame number four digit with proceedings 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 missing.
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 generated.
- --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 RELATIVE.
- --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>.
EXAMPLES¶
- pfsinimgmagick frame%04d.dpx --frames 0:10 | pfsview
-
Read frames from files frame0000.dpx, frame0001.dpx, ..., frame0010.dpx and
show them using pfsview.
BUGS¶
pfsinimgmagick 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 ALSO¶
pfsin(1),
pfsout(1) ImageMagick(1)