qstatistics: Calculate image statistics for multi-amplifier CCD images

Package: quadred

Usage

qstatistics images

Parameters

images

List of image names in quadformat.

window = "datasec" (datasec|trimsec|biassec)

Type of section to output. The choices are "datasec" for the amplifier section which includes the bias if any is present, "trimsec" for the trim section, and "biassec" for the bias section.

The remaining parameters come from the imstatistics task.

Description

This script tasks uses the quadsections task to break the quadformat data into separate sections and runs the imstatistics task on the sections.

Examples

1. To compute the mean and stddev of the data section.

qu> qstat quad0072 fields=image,mean,stddev
#               IMAGE      MEAN    STDDEV
 quad0072[1:1034,1:1024]     5537.     2647.
 quad0072[1163:2196,1:1024]     6210.     5439.
 quad0072[1:1034,1025:2048]     5364.     2535.
 quad0072[1163:2196,1025:2048]     5862.     1327.

2. To compute the mean and stdev of the bias section.

qu> qstat quad0072 fields=image,mean,stddev window=biassec
#               IMAGE      MEAN    STDDEV
 quad0072[1045:1098,1:1024]      713.     1.272
 quad0072[1099:1152,1:1024]     516.2     1.425
 quad0072[1045:1098,1025:2048]     554.3     1.347
 quad0072[1099:1152,1025:2048]     530.3     1.377

See also

quadformat, quadsections, imstatistics