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 "September 29, 2005"
15 dcraw - convert raw digital photos to PPM format
18 [\fIOPTION\fR]... [\fIFILE\fR]...
21 converts raw digital photos to
27 Print verbose messages. The default is to print only warnings
31 Change the access and modification times of a JPEG or raw file to
32 when the photo was taken, assuming that the camera clock was set
36 Identify files but don't decode them.
39 can decode the last file, 1 if it can't.
43 cannot decode JPEG files!!
46 Write binary image data to standard output.
49 creates files with a ".ppm" extension.
52 Show the raw data as a grayscale image with no interpolation.
53 Good for photographing black-and-white documents.
56 Set the interpolation quality (default is 3):
59 \ \ Bilinear (very fast, low quality)
65 \ \ Variable Number of Gradients (VNG)
68 \ \ Adaptive Homogeneity-Directed (AHD)
71 Output a half-size image. Twice as fast as
75 Interpolate RGB as four colors. This blurs the image a little,
76 but it eliminates false 2x2 mesh patterns.
78 .B -B sigma_domain sigma_range
79 Use a bilateral filter to smooth noise while preserving edges.
81 is in units of pixels, while
83 is in units of CIELab colorspace.
89 Automatic color balance. The default is to use a fixed
90 color balance based on a white card photographed in sunlight.
93 Use the color balance specified by the camera.
94 If this can't be found,
96 prints a warning and reverts to the default.
98 .B -r red_mul -l blue_mul
99 Further adjust the color balance by multiplying the red and
100 blue output channels by these values. Both default to 1.0.
103 Change the output brightness. Default is 1.0.
106 Set the black point. Default depends on the camera.
111 clips all colors to prevent pink hues in the highlights.
112 Combine this option with
114 to leave the image data completely unclipped.
117 Write raw camera colors to the output file. By default,
119 converts to sRGB colorspace.
122 For Fuji\ Super\ CCD cameras, show the image tilted 45 degrees
123 so that each output pixel corresponds to one raw pixel.
126 For Fuji\ Super\ CCD\ SR cameras, use the secondary sensors, in
127 effect underexposing the image by four stops to reveal detail
131 For all other cameras,
135 are silently ignored.
138 Flip the output image. The most common flips are 5
139 (90 degrees CCW) and 6 (90 degrees clockwise). By default,
140 dcraw tries to use the flip specified by the camera.
147 Write eight bits per color value with a 99th-percentile white
148 point and the standard 0.45 gamma curve. Double the height if
149 necessary to correct the aspect ratio. This is the default.
152 Write sixteen bits per color value. Output is linear with
153 input -- no white point, no gamma, same aspect ratio.
158 written in Adobe PhotoShop format. File extension is ".psd".
169 option does not work with many cameras.
171 No attempt is made to save camera settings or thumbnail images.
173 The author stubbornly refuses to add more output formats.
177 to produce the same images as software provided by the camera
180 gives better results!
182 Written by David Coffin, dcoffin a cybercom o net