Provided by: fitsh_0.9.2-1_amd64
fiign - low-level manipulation of masks associated to FITS images
fiign [options and operations] [<input>] [-o|--output <output>]
In the context of FITS image data processing, "masks" are per pixel associated meta-data, representing the state of the given pixel. In general, pixels considered to be somehow "bad" are marked with these masks in order to exclude or use only with caution during further processing. These masks can either mark the initial state of the given pixels (e.g. pixels can be marked as hot or bad pixels, which describes the detector itself and not the individual scientific or calibration frames), or masks can be added during the subsequent steps of the processing (e.g. saturated pixels, "outer" pixels). The purpose of the `fiign` program is to give a low-level access to these masks. Although the operations on the images automatically yields the respective operations on the masks (e.g. if an image is transformed or trimmed, the associated mask will also be transformed or trimmed with the same geometry), with this program the masks can be manipulated arbitrarily.
General options: -h, --help Gives general summary about the command line options. --long-help, --help-long Gives a detailed list of command line options. --wiki-help, --help-wiki, --mediawiki-help, --help-mediawiki Gives a detailed list of command line options in Mediawiki format. --version, --version-short, --short-version Gives some version information about the program. -i, --input <image file> Name of the input FITS image file. -o, --output <image file> Name of the output FITS image file (can be the same as the input image file). Generic pixel masking options: -n, --ignore-nonpositive Mask pixels with non-positive values. -g, --ignore-negative Mask pixels with negative values. -z, --ignore-zero Mask pixels with a value of zero. --ignore-mask Completely ignore mask associated to the input image. -M, --input-mask <image file> Input mask file to co-add to output image mask. -a, --apply-mask Apply the mask to the image, i.e. set the pixel values with non-null mask to be zero (by default, or any other value specified by "-m|--mask-value"). -m, --mask-value <value> Override the default pixel value (zero) during explicit marking of masked pixels (see also "-a|--apply-mask"). Marking saturated pixels: -s <saturation-level> Saturation level. -S <image file> Image containing saturation level on a per pixel basis. --leak-left-right, --leak-lower-upper, --leak-any Readout direction, i.e. orientation of "blooming" stripes. Mask conversion: --convert <match>:<value>:<reset>:<set> Convert masks: from a mask which matches to the <match>:<value> pair, i.e. the masks with the type of <match> have a value of <value> the masks specified by <reset> are cleared and the masks specified by <set> are set. The <match>, <value>, <reset> and <set> tags are comma-separated list of mask names (see below). Mask names: none no mask at all clear same as "none" fault mask for faulty pixels hot mask for hot pixels cosmic mask for marking cosmic pixels outer pixels originating from out of image areas oversaturated oversaturated pixels bloomed "bloomed" pixels (i.e. not oversaturated but neighbouring pixel(s) may be so) saturated oversaturated or bloomed pixels interpolated pixels having an interpolated value (e.g. hot or cosmic pixels are replaced by the average value of the surrounding pixels).
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