---
name: "ra_t16"
section: "1"
platform: "linux"
package: "radiance"
version: "4R1+20120125-1+b1"
release: "Debian 7 (Wheezy)"
platforms: ["linux"]
url: "https://new.carta.tech/ra_t16"
---

# ra\_t16(1)

convert RADIANCE picture to/from Targa 16 or 24-bit image file

## 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 output 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)](/pfilt/1.md), [ra\_bmp(1)](/ra_bmp/1.md), ra\_bn(1), [ra\_ppm(1)](/ra_ppm/1.md), ra\_pr(1), ra\_pr24(1), [ra\_t8(1)](/ra_t8/1.md), [ra\_tiff(1)](/ra_tiff/1.md), [ximage(1)](/ximage/1.md)