Method

VipsImageproject

Declaration [src]

int
vips_project (
  VipsImage* in,
  VipsImage** columns,
  VipsImage** rows,
  ...
)

Description [src]

Find the horizontal and vertical projections of an image, ie. the sum of every row of pixels, and the sum of every column of pixels. The output format is uint, int or double, depending on the input format.

Non-complex images only.

::: seealso vips_hist_find(), vips_profile().

Parameters

columns VipsImage
 

Sums of columns.

 The argument will be set by the function.
 The instance takes ownership of the data, and is responsible for freeing it.
rows VipsImage
 

Sums of rows.

 The argument will be set by the function.
 The instance takes ownership of the data, and is responsible for freeing it.
... none
 

NULL-terminated list of optional named arguments.

Return value

Returns: int
 

0 on success, -1 on error.