af_resize

The C interface for resize. More...

afError	af_resize_S (const unsigned mO, const unsigned nO, float *d_out, const unsigned mI, const unsigned nI, const float *d_in, const unsigned channels, const int type=1)
	Image resizing. More...
afError	af_resize_D (const unsigned mO, const unsigned nO, double *d_out, const unsigned mI, const unsigned nI, const double *d_in, const unsigned channels, const int type=1)
	Image resize, double precision. More...

Detailed Description

The C interface for resize.

The resize function scales an image up or down based on a constant scaling factor or an explicit new size. resize provides two methods for this operation, nearest neighbor interpolation and bilinear interpolation.

The following examples illustrate the difference between the two types of interpolation:

float h_in[]  = {1, 2, 3, 4};
array in(2, 2, h_in);
// in = 1 3
//      2 4

array out = resize(2.0f, in, 'N');

// out = 1 1 3 3
//       1 1 3 3
//       2 2 4 4
//       2 2 4 4

array bi_out = resize(2.0f, in, 'L');

// out = 1.00 1.50 2.50 3.00
//       1.25 1.75 2.75 3.25
//       1.75 2.25 3.25 3.75
//       2.00 2.50 3.50 4.00

Function Documentation

afError af_resize_S	(	const unsigned	mO,
		const unsigned	nO,
		float *	d_out,
		const unsigned	mI,
		const unsigned	nI,
		const float *	d_in,
		const unsigned	channels,
		const int	type = 1
	)

Image resizing.

Parameters

[in]	mO	Number of rows in output image
[in]	nO	Number of columns in output image
[out]	d_out	The output image
[in]	mI	Number of rows in input image
[in]	nI	Number of columns in input image
[in]	d_in	Input image
[in]	channels	specifies color channels of the image {1 or 3}
[in]	type	specifies type of image interpolation {nearest(0),bilinear(1)}Image resize, single precision

afError af_resize_D	(	const unsigned	mO,
		const unsigned	nO,
		double *	d_out,
		const unsigned	mI,
		const unsigned	nI,
		const double *	d_in,
		const unsigned	channels,
		const int	type = 1
	)

Image resize, double precision.