Function
Vipssum
Declaration [src]
int
vips_sum (
VipsImage** in,
VipsImage** out,
int n,
...
)
Description [src]
This operation sums all images in in
and writes the result to out
.
If the images differ in size, the smaller images are enlarged to match the largest by adding zero pixels along the bottom and right.
If the number of bands differs, all but one of the images must have one band. In this case, n-band images are formed from the one-band images by joining n copies of the one-band images together, and then the n-band images are operated upon.
The input images are cast up to the smallest common format (see table Smallest common format in arithmetic), then the following table is used to determine the output type:
In other words, the output type is just large enough to hold the whole range of possible values.
See also: vips_add().
This function is not directly available to language bindings |
Parameters
in |
An array of VipsImage* |
Array of input images. |
|
The length of the array is specified in the n argument. | |
The data is owned by the caller of the function. | |
out |
VipsImage |
Output image. |
|
The argument will be set by the function. | |
The called function takes ownership of the data, and is responsible for freeing it. | |
n |
int |
Number of input images. |
|
... |
|
|