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ra_t16(1) [debian man page]

RA_T16(1)						      General Commands Manual							 RA_T16(1)

NAME
ra_t16 - convert RADIANCE picture to/from Targa 16 or 24-bit image file SYNOPSIS
ra_t16 [ -2 ][ -3 ][ -g gamma ][ -e +/-stops ] [ input [ output ] ] ra_t16 -r [ -g gamma ][ -e +/-stops ] [ input [ output ] ] DESCRIPTION
Ra_t16 converts between RADIANCE and Targa 16-bit or 24-bit RGB image files (type 2 in Targa's documentation). In the default mode, a RADIANCE picture is converted to an RGB file of the same horizontal and vertical dimensions with 16-bits per pixel. The -3 option tells the program to produce a 24-bit image file instead. The -g option specifies the exponent used in gamma correction; the default value is 2.2. An exponent of 1.0 turns gamma correction off. The -e option specifies an exposure compensation in f-stops (powers of two). Only integer stops are allowed, for efficiency. The -r option invokes a reverse conversion, from a 16-bit or 24-bit Targa file to a RADIANCE picture. The determination of depth is made automatically on reverse translation, so the -2 and -3 options are not necessary. If the out- put file is missing, the standard output is used. AUTHORS
Greg Ward BUGS
Run-length encoded files can be read but not written with this program. SEE ALSO
pfilt(1), ra_bmp(1), ra_bn(1), ra_ppm(1), ra_pr(1), ra_pr24(1), ra_t8(1), ra_tiff(1), ximage(1) RADIANCE
11/15/93 RA_T16(1)

Check Out this Related Man Page

RA_BMP(1)						      General Commands Manual							 RA_BMP(1)

NAME
ra_bmp - convert RADIANCE picture to/from Windows BMP image SYNOPSIS
ra_bmp [ -b ][ -g gamma ][ -e spec ][ -p xr yr xg yg xb yb xw yw ] [ [ input|- [ output ] ] ra_bmp -r [ -g gamma ][ -e +/-stops ] [ [ input|- [ output ] ] DESCRIPTION
Ra_bmp converts between RADIANCE and a Windows BMP image. During forward conversion, the -b option produces 8-bit grayscale output rather than 24-bit RGB. The -g option specifies the exponent used in monitor gamma correction; the default value is 2.2. The -e option specifies a tone-mapping method or exposure compensation. If the argument is one of the special words "auto", "human", or "linear", the image will be tone-mapped with histogram adjustment, human vision simulation, or an averaged linear exposure, respectively. (These words may be abbreviated by one or more letters.) Otherwise, the exposure specification is interpreted as a linear compensation value in integer f- stops, which must be proceeded by a '+' or '-'. The CRT color output primaries may be specified with the -p option. The -r option invokes a reverse conversion, from a Windows BMP image to a RADIANCE picture. Tone-mapping and monitor primaries are not supported for reverse conversion. Ra_bmp can accept 16-bit or color-mapped BMP files on input, but cannot not produce them on output. A hyphen ('-') may be specified to indicate standard input for either forward or reverse conversion so that an output file may be speci- fied. If the BMP input is taken from the standard input or sent to the standard output without tone-mapping, then the scanlines may be reversed from their usual ordering. Reversed scanlines sometimes causes difficulties for programs attempting to interpret the resulting RADIANCE picture or BMP image, which may be rejected or displayed inverted. AUTHOR
Greg Ward SEE ALSO
pfilt(1), ra_ppm(1), ra_pr(1), ra_pr24(1), ra_t8(1), ra_t16(1), ra_tiff(1), ximage(1) RADIANCE
3/25/04 RA_BMP(1)
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