Method
VipsImagecountlines
Declaration [src]
int
vips_countlines (
VipsImage* in,
double* nolines,
VipsDirection direction,
...
)
Description [src]
Function which calculates the number of transitions between black and white for the horizontal or the vertical direction of an image. black<128 , white>=128 The function calculates the number of transitions for all Xsize or Ysize and returns the mean of the result Input should be one band, 8-bit.
See also: vips_morph(), vips_conv().
This method is not directly available to language bindings.
Parameters
nolines-
Type:
double*Output average number of lines.
The argument will be set by the function. direction-
Type:
VipsDirectionCount lines horizontally or vertically.
...-
Type:
NULL-terminated list of optional named arguments.