2 .\" Man page for dcraw (Raw Photo Decoder)
4 .\" Copyright (c) 2005 by David Coffin
6 .\" You may distribute without restriction.
9 .\" dcoffin a cybercom o net
10 .\" http://www.cybercom.net/~dcoffin
12 .TH dcraw 1 "April 28, 2005"
15 dcraw - convert raw digital photos to PPM format
18 [\fIOPTION\fR]... [\fIFILE\fR]...
21 converts raw digital photos to
27 Identify files but don't decode them.
30 can decode the last file, 1 if it can't.
33 Write binary image data to standard output.
36 creates files with a ".ppm" extension.
39 Print verbose messages. Default is to print only warnings and errors.
42 Show the raw data as a grayscale image with no interpolation.
43 Good for photographing black-and-white documents.
46 Use simple bilinear interpolation for quick results. The
47 default is to use a slow, high-quality adaptive algorithm.
50 Half-size the output image. Instead of interpolating, reduce
51 each 2x2 block of sensors to one pixel. Much faster than
55 Interpolate RGB as four colors. This causes a slight loss
58 only if you see false 2x2 mesh patterns in blue sky.
61 Automatic color balance. The default is to use a fixed
62 color balance based on a white card photographed in sunlight.
65 Use the color balance specified by the camera.
66 If this can't be found,
68 prints a warning and reverts to the default.
70 .B -r red_mul -l blue_mul
71 Further adjust the color balance by multiplying the red and
72 blue channels by these values. Both default to 1.0.
75 Change the output brightness. Default is 1.0.
80 clips all colors to prevent pink hues in the highlights.
81 Combine this option with
83 to leave the image data completely unclipped.
86 Write raw camera colors to the output file. By default,
88 converts to sRGB colorspace.
91 For cameras based on the Fuji Super CCD SR, use the secondary
92 sensors, in effect underexposing the image by four stops to
93 reveal detail in the highlights. For all other cameras,
98 Flip the output image. The most common flips are 5
99 (90 degrees CCW) and 6 (90 degrees clockwise). By default,
100 dcraw tries to use the flip specified by the camera.
107 Write eight bits per color value with a 99th-percentile white
108 point and the standard 0.45 gamma curve. Double the height if
109 necessary to correct the aspect ratio. This is the default.
112 Write sixteen bits per color value. Output is linear with
113 input -- no white point, no gamma, same aspect ratio.
118 written in Adobe PhotoShop format. File extension is ".psd".
120 ppm(5), ppm2tiff(1), pnmtotiff(1), pnmtopng(1), gphoto2(1).
124 option does not work with many cameras.
126 No attempt is made to save camera settings or thumbnail images.
128 Author stubbornly refuses to add more output formats.
132 to produce the same images as software provided by the camera
135 gives better results!
137 Written by David Coffin, dcoffin a cybercom o net