cameratopam man page on Oracle

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Cameratopam User Manual(0)			    Cameratopam User Manual(0)

       cameratopam - convert raw camera image to PAM



       [-identify_only]	 [-quick_interpolate]  [-half_size]  [-four_color_rgb]
       [-document_mode] [-balance_auto]	 [-balance_camera]  [-red_scale=float]
       [-blue_scale=float]    [-bright=fraction]    [-no_clip_color]	[-rgb]
       [-use_secondary] [-linear] [-verbose]

       All options can be abbreviated to their shortest	 unique	 prefix.   You
       may use two hyphens instead of one to designate an option.  You may use
       either white space or an equals sign between an	option	name  and  its

       This program is part of Netpbm(1)

       cameratopam  converts from any of dozens of raw camera image formats to

       Digital still cameras often can produce images in a special raw	format
       in  addition  to	 something  more standard such as TIFF or JFIF (JPEG).
       Software supplied with the camera allows you to	manipulate  the	 image
       using  information which is lost when the camera converts to the common
       format.	A particular camera model often has a unique raw format.

	      Report to Standard Error the format of the input image but don't
	      generate	an output image.  Program fails if it cannot recognize
	      the format.

	      Report to Standard Error details of the processing.

	      Use  simple  bilinear  interpolation  for	 quick	results.   The
	      default is to use a slow, high-quality adaptive algorithm.

	      Half-size	 the  output  image.  Instead of interpolating, reduce
	      each 2x2 block of	 sensors  to  one  pixel.   Much  faster  than

	      Interpolate  RGB	as  four colors.  This causes a slight loss of
	      detail, so use this only if you see false 2x2 mesh  patterns  in
	      blue sky.

	      Show  the	 raw  data as a grayscale image with no interpolation.
	      This is good for photographing black and white documents.

	      Automatic color balance.	The default is to use  a  fixed	 color
	      balance based on a white card photographed in sunlight.

	      Use  the	color balance specified by the camera.	If cameratopam
	      can't find this, it prints a warning and reverts to the default.


	      Further adjust the color balance by multiplying the red and blue
	      channels by these values.	 Both default to 1.0.

	      Change the output brightness.  Default is 1.0.

	      By default, cameratoapm clips all colors to prevent pink hues in
	      the highlights.  Combine this option with -bright=0.25 to	 leave
	      the image data completely unclipped.

       -rgb   Write raw camera colors to the output file.  By default, camera‐
	      toapm converts to sRGB colorspace.

	      For cameras based on the Fuji Super CCD SR, this	option	causes
	      cameratopam  to use the secondary sensors, in effect underexpos‐
	      ing the image by four stops to reveal detail in the  highlights.
	      cameratopam silently ignores this option for all other cameras.

	      This  option  causes  cameratopam to generate a variation on PAM
	      that has 'linear' color samples.	In true PAM,  each  sample  in
	      the image raster is gamma-corrected; i.e. it is essentially pro‐
	      portional to brightness.	With the  linear  option,  cameratopam
	      generates an image in which the samples are instead proportional
	      to light intensity.

	      Without -linear, the image maxval is 255, so the image  contains
	      one  byte per sample.  With -linear, the maxval is 65535, so the
	      image contains two bytes per sample.

	      Without -linear, cameratopam uses a 99th percentile white point.
	      With -linear, it doesn't.	 I don't know what that means.

       411toppm(1) , pamflip(1) , pam(1) ,

       cameratopam was new in Netpbm 10.28 (June 2005).

       It    was   derived   from   the	  program   dcraw   by	 Dave	Coffin
       ⟨⟩ , by Bryan Henderson in April
       2005.   Bryan  replaced the part that generates the Netpbm output image
       and removed the Adobe Photoshop output  function.   Bryan  changed  the
       command syntax and made other small changes to make the program consis‐
       tent with Netpbm.  He also split the source code into manageable pieces
       (dcraw has a single 5000 line source file).

netpbm documentation		 12 April 2005	    Cameratopam User Manual(0)

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