imreplace images value lower upper
images
Images in which the pixels are to be replaced.
value
Replacement value for pixels in the window.
imaginary = 0.
Replacement value for pixels in the windoe for the imaginary part of
complex data.
lower = INDEF
Lower limit of window for replacing pixels. If INDEF then all pixels
are above lower. For complex images this is the magnitude
of the pixel values.
upper = INDEF
Upper limit of window for replacing pixels. If INDEF then all pixels
are below upper. For complex images this is the magnitude
of the pixel values.
The pixels in the images between lower and upper are replaced by the constant value. The special value INDEF in lower and upper corresponds to the minimum and maximum possible pixel values, respectively.
For complex images the replacement value is specified as separate real and imaginary and the thresholds are the magnitude.
1. In a flat field calibration which has been scaled to unit mean replace all response values less than or equal to 0.8 by 1.
cl> imreplace calib 1 upper=.8
2. Set all pixels to zero within a section of an image.
cl> imreplace image[1:10,5:100] 0