where ? is replaced by the particular command.
If n1=0, it defaults to the most recently used image plane. If no image planes have been used yet, n1 defaults to image plane 1. This default is represented in the parameter description as <last image>.
IMAGE COMMANDS AVAILABLE:
IA:Image Averaging IB:Image Blank ID:Image Display IF:Image Filtering IH:Image Histogram IL:Image Label IM:Image Modify IO:Image Overlay IW:Image Window IX:Image Transfer IZ:Image Clearing I+:Image Add I-:Image Subtract I*:Image Multiply I/:Image Divide
IA [n1,n2,...,n11] n1: Destination image plane <last image> n2: Source image plane <n1> n3-n11: Weights for averaging <1>Weights are assigned as follows in a 3X3 matrix:
n3 n4 n5
n6 n7 n8
n9 n10 n11
ID [n1,n2,n3] n1: image plane assigned to Red gun <last image> n2: image plane assigned to Green gun <n1> n3: image plane assigned to Blue gun <n2>If image planes are not specified, the colour gun mapping is set to the previous setting before the last IB, GD, or ZZ command.
IF [n1,n2,...,n11] n1: Destination image plane <last image> n2: Source image plane <n1> n3-n11: Weights for filtering <see table>The weights and their defaults are as follows for a 3X3 matrix:
weights: defaults:
n3 n4 n5 -1 -1 -1
n6 n7 n8 -1 8 -1
n9 n10 n11 -1 -1 -1
IH [n1,n2,...,n17]
n1: Image plane for histogram plotting <last image>
n2: Graphic to plot histogram on <n1>
n3,n4: X and Y offsets to sample window <0,0>
n5,n6: X and Y dimensions of sample window <display size>
n7: Graphic plane number for mask, <0>
0 if no graphic mask is being used
n8,n9: Plot window offset <n1/8 display size>
n10,n11: Plot window size <1/2 display size>
If n10,n11 are explicitly specified,
then n8,n9 default to 0,0
n12: Histogram smoothing factor <no smoothing>
n13: Plot type; 1: single points, <3>
2: connected lines, 3: vertical bars
n14: Point mark type (See GM command) <none>
n15: Labelling: 1: yes, 2: no. <1>
Labelling occurs only if there is
enough room around the plot window
to write the labels.
n16,n17: Grey-level plot range <0,255>
IL [n1,n2,n3,n4,n5,label]
n1: Image plane to label <last image>
n2: Character font size <1>
-1: small font (6 x 8)
0 or 1: standard font (9 x 12)
2,3,4,5: large font (14*(n2-1) x 24*(n2-1))
n3: Grey-level value of label <255>
n4,n5: Upper left position of label <cursor position>
label: Alphanumeric text for label <prompted>
The standard (default) character font is 9 by 12 pixels. It is
printed when n2 = 0 or 1. The small character font is 6 by 8 pixels
and is printed when n2 = -1. The large font is 14*(n2-1) by
24*(n2-1) pixels, where n2 is between 2 and 5. For example: setting
n2 = 2 prints 14 by 24 pixel large font. If n3 > 0, the characters
are assigned value n3 (default 255). If n3 < 0, the rectangular
border around the characters is assigned the value -n3, whereas
image values under characters are untouched. If `label' is missing,
the user is continuously prompted to enter lines of text until an
empty line is entered. If n4,n5 are not specified, the current
cursor position specifies the upper left corner for the next line of
text. If the cursor is not moved between entering lines of text, the
next line is printed immediately below the current line. However, if
the cursor is moved, the next line is printed starting at the new
cursor position. If both n4,n5 are specified, the cursor position
has no effect on the label position, and each line of text is always
printed below the previous line.
IM [n1],n2[,n3,n4] n1: Image plane to modify <last image> n2: Grey-level value <0> n3,n4: Coordinates of position to modify <cursor position>
IO [n1,n2,n3] n1: Image plane assigned to Red gun <last image> n2: Image plane assigned to Green gun <n1> n3: Image plane assigned to Blue gun <n2>If image planes are not specified, the colour gun mapping is set to the previous setting before the last IB, GD, or ZZ command.
IW [n1,n2,n3,n4,n5] n1: Image plane to be examined <last image> n2,n3: Window centre point <cursor position> n4,n5: Window size <16,16>
IX [n1],n2 n1: Destination image plane <last image> n2: Source image plane <>
IZ [n1,n2,n3] n1: Image plane to be cleared <last image> n2: First line to be cleared <1> n3: Last line to be cleared <bottom line>
n1: Image plane to contain results of <last image>
arithmetic operation
n2: Image plane, first operand <0>
n3: Image plane, second operand <0>
n4: Scalar, alternate second operand <>
I+ [n1],n2,n3[,n4] Addition n1 = n2 + ni
I- [n1],n2,n3[,n4] Subtraction n1 = n2 - ni
I* [n1],n2,n3[,n4] Multiplication n1 = n2 * ni
I/ [n1],n2,n3[,n4] Division n1 = n2 / ni
where ni is either n3 or n4.If n3 is null, n4 is used. If n3 is specified, n4 is ignored. n3 and n4 cannot both be null.