input,s,a,,,,"input image"
x1,i,a,1,,,"X-pixel number for start of trail"
y1,i,a,1,,,"X-pixel number for start of trail"
x2,i,a,9000,,,"Y-pixel number for end of trail"
y2,i,a,9000,,,"Y-pixel number for end of trail"
width,i,a,10,,,"width of trail in pixels"
value,r,h,-10000.0,,,"replace pixels with this value"
mode,s,h,"ql",,,