vcrop(1Vi)vcrop(1Vi)NAME
vcrop - crop an image
SYNOPSIS
vcrop [-option ...] [infile] [outfile]
DESCRIPTION
vcrop crops a file of images using a cropping rectangle specified by command line options.
COMMAND LINE OPTIONS
vcrop accepts the following options:
-help Prints a message describing options.
-in infile Specifies a Vista data file containing the input images.
-out outfile Specifies where to write the cropped images as a Vista data file.
-top row Specifies the first (top) row of the cropping rectangle.
-bottom row Specifies the last (bottom) row of the cropping rectangle.
-left col Specifies the first (leftmost) column of the cropping rectangle.
-right col Specifies the last (rightmost) column of the cropping rectangle.
-height nrows Specifies the height of the cropping rectangle.
-width ncols Specifies the width of the cropping rectangle.
The cropping rectangle must be unambiguously specified by using any two of -top, -bottom, and -height, plus any two of -left, -right, and
-width.
The cropping rectangle may fall partially or completely outside an image it is cropping; in that case, the area outside is filled with
zeros.
Input and output files can be specified on the command line or allowed to default to the standard input and output streams.
SEE ALSO vxcrop(1Vi), VImage(3Vi), Vista(7Vi)AUTHOR
Ralph Horstmann <horstman@cs.ubc.ca>
Vista Version 1.12 24 April 1993 vcrop(1Vi)
Check Out this Related Man Page
vinvert(1Vi)vinvert(1Vi)NAME
vinvert - invert image pixel values
SYNOPSIS
vinvert [option ...] [infile] [outfile]
DESCRIPTION
vinvert inverts each input image to produce a corresponding output image. The operation is suitable for swapping black and white in a grey-
scale image.
Each output pixel is computed from the corresponding input pixel by
out-pixel = M - in-pixel
where M is the maximum value allowed by the pixel representation, or 1 in the case of float or double pixels. Input pixel values must lie
in the range [0,M].
Each output image has the same number of bands, rows and columns, and the same pixel representation, as the corresponding input image.
COMMAND LINE OPTIONS
vinvert accepts the following options:
-help Prints a message describing options.
-in infile Specifies a Vista data file containing the input images.
-out outfile Specifies where to write the output images as a Vista data file.
Input and output files can be specified on the command line or allowed to default to the standard input and output streams.
SEE ALSO vnegate(1Vi), vop(1Vi), VImage(3Vi), Vista(7Vi)AUTHOR
Art Pope <pope@cs.ubc.ca>
Vista Version 1.12 24 April 1993 vinvert(1Vi)
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