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.\" RCSid "$Id: pcompos.1,v 1.3 2006/09/08 21:38:25 greg Exp $" |
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.TH PCOMPOS 1 12/18/97 RADIANCE |
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.SH NAME |
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pcompos - composite RADIANCE pictures. |
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.SH SYNOPSIS |
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.B pcompos |
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[ |
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.B \-h |
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][ |
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.B "\-x xres" |
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][ |
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.B "\-y yres" |
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][ |
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.B "\-b r g b" |
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][ |
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.B "\-lh h" |
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][ |
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.B \-la |
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] |
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[ |
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.B "\-t min1" |
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][ |
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.B "\+t max1" |
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][ |
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.B "\-l lab" |
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][ |
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.B "=SS" |
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] |
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.B "pic1 x1 y1 .." |
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.br |
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or |
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.br |
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.B pcompos |
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[ |
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.B "\-a ncols" |
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][ |
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.B "\-s spacing" |
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][ |
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.B "\-o x0 y0" |
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][ |
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options |
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] |
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.B "pic1 pic2 .." |
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.SH DESCRIPTION |
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.I Pcompos |
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arranges and composites RADIANCE pictures and sends the result to the |
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standard output. |
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Each input picture must be accompanied by an anchor point (unless the |
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.I \-a |
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option is used, see below). |
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This anchor point is the usually position of the picture's |
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left lower corner in the final output, but can be changed |
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for individual pictures with an |
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.I =SS |
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option, where |
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.I S |
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is one of '-', '+' or '0', indicating the minimum, maximum or center |
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of the image, respectively. |
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(For example, |
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.I =+- |
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would indicate the anchor is relative to the right lower corner, and |
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.I =-0 |
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would indicate the anchor is relative to the center of the left |
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edge.)\0 |
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Negative anchor coordinates result in the input being cropped at the origin. |
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By default, the size of the output picture will be just large enough |
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to encompass all the input files. |
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By specifying a smaller dimension using the |
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.I \-x |
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and |
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.I \-y |
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options, input files can be cropped at the upper boundary. |
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Specifying a larger dimension produces a border. |
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The |
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.I \-b |
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option specifies a background color to appear wherever input |
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files do not cover. |
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The default value is black (0 0 0). |
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The |
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.I \-h |
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option may be used to reduce the information header size, which |
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can grow disproportionately after multiple runs of |
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.I pcompos |
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and/or |
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.I pcomb(1). |
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.PP |
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If input files overlap, later pictures will overwrite earlier ones. |
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By default, input files are copied unconditionally within the output |
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boundaries. |
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The |
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.I \-t |
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option specifies a lower threshold intensity under which input pixels |
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will not be copied to the output. |
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The |
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.I \+t |
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option specifies an upper threshold. |
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These options are useful for cutting around irregular boundaries in |
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the input. |
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.PP |
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The |
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.I \-l |
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option can be used to specify a label for a specific picture, which |
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will be given a height determined by the |
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.I \-lh |
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option (default 24 pixels) and placed in the upper left corner of |
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the picture. |
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This label is generated by the program |
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.I psign(1). |
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The |
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.I \-la |
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option instructs |
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.I pcompos |
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to label each picture automatically by its name. |
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This is particularly useful in conjunction with the |
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.I \-a |
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option for producing a catalog of images (see example below). |
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The |
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.I \-l |
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option may still be used to override the default label |
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for a picture. |
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.PP |
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The |
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.I \-a |
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option can be used to automatically compute anchor points |
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that place successive pictures next to each other in |
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.I ncols |
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columns. |
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The ordering will place the first picture in the lower left corner, |
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the next just to the right of it, and so on for |
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.I ncols |
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pictures. |
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Then, the next row up repeats the pattern until all the input |
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pictures have been added to the output. |
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If the pictures are of different size, |
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.I pcompos |
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will end up leaving some background areas in the output picture. |
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There will also be an unfinished row at the top if the number |
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of pictures is not evenly divided by |
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.I ncols. |
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The |
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.I "\-s N" |
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option will cause each image to be separated by at least N pixels. |
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The |
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.I "\-o x0 y0" |
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option specifies a nonzero anchor point for the bottom left image. |
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.PP |
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The standard input can be specified with a hyphen ('-'). |
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A command that produces a RADIANCE picture can be given in place of a file |
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by preceeding it with an exclamation point ('!'). |
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.SH EXAMPLE |
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To put a copyright label at the bottom of a picture: |
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.IP "" .2i |
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psign Copyright 1987 | pcompos pic.inp 0 0 +t .5 - 384 64 > pic.out |
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.PP |
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To make a catalog of images separated by white 10-pixel borders: |
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.IP "" .2i |
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pcompos \-la \-a 4 \-s 10 \-b 1 1 1 dog*.pic > alldogs.pic |
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.SH NOTES |
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Since there is a limit to the number of open files and processes, |
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large collections of images must be created in stages. |
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Even if the system limit on open files is large, |
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.I pcompos |
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places an artificial limit of 64 on the number of open files and/or |
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processes. |
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.SH AUTHOR |
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Greg Ward |
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.SH "SEE ALSO" |
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getinfo(1), pcomb(1), pfilt(1), psign(1), rpict(1) |