kml_fft(f/h)_plan_upsampling_2d

Create a plan for the two-dimensional upsampling transform of a single contiguous data sequence.

Interface Definition

C interface:

kml_fft_plan kml_fft_plan_upsampling_2d(int n0, int n1, int n0_result, int n1_result, double s0, double s1, double *in_, double *out_, unsigned flags);

kml_fftf_plan kml_fftf_plan_upsampling_2d(int n0, int n1, int n0_result, int n1_result, float s0, float s1, float *in_, float *out_, unsigned flags);

kml_ffth_plan kml_ffth_plan_upsampling_2d(int n0, int n1, int n0_result, int n1_result, __fp16 s0, __fp16 s1, __fp16 *in_, __fp16 *out_, unsigned flags);

Parameters

Parameter	Data Type	Description	Input/Output
n0	int	Number of rows in the input image.	Input
n1	int	Number of columns in the input image.	Input
n0_result	int	Number of rows in the output image.	Input
n1_result	int	Number of columns in the output image.	Input
s0	Double precision: double Single precision: float Half precision: __fp16*	X component of the shift operation.	Input
s1	Double precision: double Single precision: float Half precision: __fp16*	Y component of the shift operation.	Input
in	Double precision: double* Single precision: float* Half precision: __fp16*	Memory pointer to the input image.	Input
out	Double precision: double* Single precision: float* Half precision: __fp16*	Memory pointer to the output image.	Output
flags	unsigned	A planning option, not in use.	Input

Dependencies

C: "kfft.h"

Examples

C interface:

    int n0 = 3;
    int n1 = 3;
    int n0_result=7;
    int n1_result=7;
    double init[9] = {0, 1, 0, 1, 0, 1, 0, 1, 0};
    double *in;
    in = (double*)kml_fft_malloc(sizeof(double) * n0 * n1);
    for (int i = 0; i < n0 * n1; i++) {
        in[i] = init[i];
    }
    double *out;
    out = (double*)kml_fft_malloc(sizeof(double) * n0_result * n1_result);
    kml_fft_plan plan;
    plan = kml_fft_plan_upsampling_2d(n0, n1, n0_result, n1_result, 0, 0, in, out, KML_FFT_ESTIMATE);
    kml_fft_execute(plan);

    kml_fft_destroy_plan(plan);
    kml_fft_free(in);
    kml_fft_free(out);

 
    /* 
     * out = {0.000000, 0.105960, 0.178233, 0.162397, 0.070375, -0.028537, -0.059857, 
     *        0.105960, 0.089665, 0.078550, 0.080985, 0.095137, 0.110349, 0.115165, 
     *        0.178233, 0.078550, 0.010558, 0.025457, 0.112027, 0.205080, 0.234545, 
     *        0.162397, 0.080985, 0.025457, 0.037624, 0.108326, 0.184322, 0.208386, 
     *        0.070375, 0.095137, 0.112027, 0.108326, 0.086821, 0.063706, 0.056387, 
     *        -0.028537, 0.110349, 0.205080, 0.184322, 0.063706, -0.065941, -0.106993, 
     *        -0.059857, 0.115165, 0.234545, 0.208386, 0.056387, -0.106993, -0.158727} 
     */

Parent topic: Upsampling Transforms