SAOimage command line The command line is the line you type when you first call the SAOimage program. Following the name of the program, you can include the name of a file to read and/or various parameters and settings. Except for the filename, all settings are identified by a "switch" beginning with a "-". Some switches are sufficient by themselves, some switches must be followed by a fixed number of arguments (usually numerical), and some switches may be followed by arguments but do not require them. These are explained below. There is no required order to the switches. The file name can also appear anywhere on the command line (SAOimage assumes that any token that is not part of a recognizable switch is the file name). Many switches have two names, one literal and one abbreviated. In such cases the names are completely interchangeable. The longer names might be used in a script where a later reader might wonder what the switches do. The abbreviated names save typing on the command line. Once SAOimage is running, you may enter a new command line, changing some of the settings and/or reading in a new image from disk. See "new" in the "etc" menu section or 'N' in the keyboard section. A few switches cannot be changed from their initial settings (i.e. the display server). There are probably more switches than can fit on a normal command line. A method of tailoring with a default parameter file will eventually be added. The following is a list of the command line switches for SAOimage: -d :. ** Specify the name of the X display server. This makes it possible to run the SAOimage program on a machine other than the one connected to your display screen, with no difference in appearance or use. The default gets the server name from the DISPLAY environment variable. See the "xhost" man page for more details. This cannot be changed once SAOimage is running. Example: connect to the display server on cfa241 saoimage -d cfa241:0.0 or saoimage -d 128.103.41.241:0.0 -g [x][{+-}{+-}] ** Specify the size and/or the screen position of SAOimage. The format is a standard X geometry statement. Both size and position may be specified, or only the size or the position. Width and height refer to the dimensions of SAOimage's desktop window (see -dispsz for sizing just the image display window). +x and +y refer to the upper left corner in screen coordinates. -x positions the right edge from the right edge of the screen. -y would positions the lower edge from the bottom of the screen. Width and height below a minimum size are defaulted to the minimum. Some window managers may alter the size and/or position slightly. Once SAOimage is running, use the window managers size and move mechanisms to make any readjustments. Examples: a) create minimum sized SAOimage near upper left corner saoimage -g 0x0+10+20 b) create a 500x700 SAOimage window in the lower right corner saoimage -g 500x700-5-5 -gd [x][{+-}{+-}] ** Specify the size of the image display subwindow and/or the screen position of SAOimage. The format is a standard X geometry statement. This switch works like -g above, except that width and height (if given) are applied to the display subwindow. The overall SAOimage window is sized accordingly. Example: create an SAOimage in the upper right with a display window to exacly show a 320x512 FITS image saoimage -G 320x512-5+0 m51.fits -name This switch is only needed if the filename starts with a number or might otherwise be recognized as a switch. -fits Image file is a FITS file. (If the image file name ends in .fits, this switch is not necessary). Only T=SIMPLE array types are supported. The header BITPIX card must be 8 (unsigned byte), 16 (signed short), 32 (signed int), -32 (float), -64 (double), or -16 (unsigned short) (the latter two are not recognized standards). IEEE floats are not converted if that is not the machine format. -dfits Image file is a FITS file as above, but in unexpected byteswapped order. The FITS standard is not swapped, but some naive VAX applications may swap it. (see -bswap) -oif Image file is an IRAF image header file in OIF format. (If the image file name ends in .imh, this switch is not necessary). IRAF STF and QPOE formats are not supported. Complex data cannot be handled. The data must have at least 2 dimensions. Only the first plane of multidimensional images is read. The data file is read directly by SAOimage (see -imtool/-pros below). -chararray -u1 Image file is an unsigned byte array file of the given dimensions. (If the file is square and has no added padding, the dimensions are not necessary). -ushortarray -u2 Image file is a unsigned short integer array file of the given dimensions. (If the file is square and has no added padding, the dimensions are not necessary). -shortarray -i2 Image file is a signed short integer array file of the given dimensions. (If the file is square and has no added padding, the dimensions are not necessary). -longarray -i4 Image file is a signed long integer array file of the given dimensions. (If the file is square and has no added padding, the dimensions are not necessary). -floatarray -r4 Image file is a real*4 array file of the given dimensions. (If the file is square and has no added padding, the dimensions are not necessary). -doublearray -r8 Image file is a real*8 array file of the given dimensions. (If the file is square and has no added padding, the dimensions are not necessary). -header -skip -sk Skip over the given number of bytes at the head of the file before reading data. This is used to skip header information or the first image if two images are stored in one file. -bswap Switch the bytes order between big-endian and little-endian order. This may be needed where data has been copied from another machine or if there is some confusion about the FITS file format. This switch toggles the previous setting. -scalebias -sb The data in the image file should be scaled and biased to get the true image value (true_value = (scale * file_value) + bias). This cannot be used with the -fits image type (scale and bias are in the FITS header), nor with -imtool or -pros (they are passed by IRAF). -ul First pixel in file represents the upper left of the image (assuming the lines of input run left to right on the screen - see rotate, below). (This switch does not override IRAF wcs image coordinates). -ll First pixel in file represents the lower left of the image. (assuming the lines of input run left to right on the screen - see rotate, below). This is the IRAF standard and the SAOimage default. -rotate <1,2,or 3> -rot <1,2,or 3> Rotate the image 90, 180, or 270 degrees (respectively) before displaying it. Rotation is applied after conversion to a lower left coordinate system (-ll) if such conversion is also requested. This is useful for images when the CCD was not mounted North-up. -one The file coordinate of the first pixel is (1,1). The real coord- inates of the center of the first pixel are (1.0,1.0). This is the IRAF standard and the default for SAOimage. The second pixel is (2,1). -zero The file coordinate of the first pixel is (0,0). The real coor- dinates center of the first pixel are (0.5,0.5) which makes the very edge 0.0. This is the standard coordinate system for image displays, but not the default for SAOimage. The second pixel is indexed (1,0). -imtool Open the named input pipe and wait for input from IRAF. In this mode, SAOimage emulates IRAF's imtool. IRAF's image loading and cursor read-back functions are supported. Unlike imtool, SAOimage has only one frame buffer; IRAF's frame buffer numbers are ignored. This switch cannot be given when there is also a file name for reading on the same command line. Listening on the pipe is assumed to be requested in place of reading a file. This is the default mode if SAOimage is started up with no file specified. -pros This command is virtually identical to the -imtool switch above. The difference occurs when the user writes the saved regions to a disk file. Imtool emulation includes writing only an IRAF list file giving center coordinates only. With -pros, SAOimage's normal region descriptor file will be written in place of the simpler list file. -idev Specify the name of the named pipe used for listening. The default is /dev/imt1o, which is the default used by IRAF. -odev Specify the name of the named pipe used for sending feedback. The default is /dev/imt1i, which is the default used by IRAF. -linear Set the scaling mode to linear scaling. -wrap [<# of wraps within scaling range>] Set the scaling mode to wrapped linear, and set the number of wraps for this mode, if given. (See scaling section) -log [] Set the scaling mode to log (exponential), and set the exponent for the curve function, if given. (See scaling section) -sqrt [] Set the scaling function to sqrt (geometric), and set the inverse of the exponent for the X**(1/n) curve, if given. (See scaling section) -histeq Set the scaling mode to hisstogram equalization. -min [] Set the minimum for the image value range used to compute scaling. The default is to take the minimum from the image shown in the display window. -min with no value resets the default. (If the minimum value in the displayed image is higher than the given minimum, the image's minimum vale is used for the scaling range.) -max [] Set the maximum for the image value range used to compute scaling. The default is to take the maximum from the image shown in the display window. -max with no value resets the default. (If the maximum value in the displayed image is higher than the given maximum, the image's maximum vale is used for the scaling range.) -rmin [] Set minimum value for reading from the image file. This value is used as the minimum value when images are pre-scaled to fit the 16 bit (signed short) working buffer. (See scaling section) -rmax [] Set maximum value for reading from the image file. This value is used as the maximum value when images are pre-scaled to fit the 16 bit (signed short) working buffer. (See scaling section) -v Set verbose mode. In verbose mode, informative statements are printed to the terminal window when various actions are taken. -q Set quiet mode. See -v above. The default mode is to be verbose. -lprbuttons Include the button menu in the hardcopy image (only on color workstations). The default on color workstations includes the area above the button panel, but excludes the buttons. -coord Set coordinate tracking as the initial state. In coordinate -ct tracking the coordinates of the mouse are printed in the lower part of the main display window. -magnifier -mt Set magnifier tracking as the intial state. With magnifier tracking, the magnifier window is continuously updated to show a magnification of the image the image under the mouse. -mag Set the magnification factor of the magnifier. This factor relates the magnifier to the magnification of the display window. The default is 4; the magnifier magnifies the image to 4 times the magnification of the main display window (but never less than zoom 1 of the original data). -palette <# of colors in display colormap palette> -p <#> Specify the number of read/write color cells to reserve. On color workstations, SAOimage reserves color cells in the default colormap for its own use (see the Color section). SAOimage reserves as many color cells as it can get, up to the number given (the default is 200). If the number given is negative, SAOimage comes up in overlay mode, using 1/2 + 2 of the color cells for overlays and graphics. In verbose mode (see -v above) SAOimage tells you how many cells it is able to use for display colors. This number can be re-entered at run-time, unless -p 1 is given, in which case SAOimage stays in halftone mode. -green ** -blue ** -red ** Set the color of all graphics to a primary (red, green, or blue). Some inexpensive systems use a monochrome monitor connected to one of the three color outputs on the computer. That color must be specified to make the graphics visible. -horizgraph ** -hg Make the auxiliary color graph window can be wide, with a color bar along the bottom (the default). -vertgraph ** -vg Make the auxiliary color graph window tall, with a colorbar along the left side. -panboxav -panboxsum -panboxsamp -panboxmax These switches select the kind of image reduction used to fit a picture of the entire image into the pan window. Each pixel is computed from a block of image pixels by averaging, summing, sampling, or taking the maximum. The default is to show the maximum from each block. (When zooming in the main display involves reduction, subsampling is always used). -bordercolor ** -bc Specify the color of all subwindow borders. Color name must be a recognized X color (there are many). This is a style issue. Example: -bc green ** This switch is only effective on the initial start-up command line.