GPU Modules

Functions
void	cudaFFT (CUstream_st *stream, int nx, int ny, cufftDoubleComplex *in_filed, cufftDoubleComplex *output_field, int direction, bool bNormailized=false)
	Convert data from the spatial domain to the frequency domain using 2D FFT on GPU. More...
void	cudaCropFringe (CUstream_st *stream, int nx, int ny, cufftDoubleComplex *in_field, cufftDoubleComplex *out_field, int cropx1, int cropx2, int cropy1, int cropy2)
	Crop input data according to x, y coordinates on GPU. More...
void	cudaDepthHoloKernel (CUstream_st *stream, int pnx, int pny, cufftDoubleComplex *u_o_gpu_, unsigned char *img_src_gpu_, unsigned char *dimg_src_gpu_, double *depth_index_gpu_, int dtr, double rand_phase_val_a, double rand_phase_val_b, double carrier_phase_delay_a, double carrier_phase_delay_b, int flag_change_depth_quan, unsigned int default_depth_quan)
	Find each depth plane of the input image and apply carrier phase delay to it on GPU. More...
void	cudaPropagation_AngularSpKernel (CUstream_st *stream_, int pnx, int pny, cufftDoubleComplex *input_d, cufftDoubleComplex *u_complex, double ppx, double ppy, double ssx, double ssy, double lambda, double params_k, double propagation_dist)
	Angular spectrum propagation method for GPU implementation. More...
void	cudaGetFringe (CUstream_st *stream, int pnx, int pny, cufftDoubleComplex *in_field, cufftDoubleComplex *out_field, int sig_locationx, int sig_locationy, double ssx, double ssy, double ppx, double ppy, double PI)
	Encode the CGH according to a signal location parameter on the GPU. More...
void	cudaChangeDepthQuanKernel (CUstream_st *stream_, int pnx, int pny, double *depth_index_gpu, unsigned char *dimg_src_gpu, int dtr, double d1, double d2, double params_num_of_depth, double params_far_depthmap, double params_near_depthmap)
	Quantize depth map on the GPU, only when the number of depth quantization is not the default value (i.e. FLAG_CHANGE_DEPTH_QUANTIZATION == 1 ). More...

Detailed Description

Function Documentation

cudaChangeDepthQuanKernel()

void cudaChangeDepthQuanKernel	(	CUstream_st *	stream_,
		int	pnx,
		int	pny,
		double *	depth_index_gpu,
		unsigned char *	dimg_src_gpu,
		int	dtr,
		double	d1,
		double	d2,
		double	params_num_of_depth,
		double	params_far_depthmap,
		double	params_near_depthmap
	)

Calculate the value of 'depth_index_gpu_'.

Parameters

stream	: CUDA Stream
pnx	: the number of column of the input data
pny	: the number of row of the input data
depth_index_gpu	: output variable
dimg_src_gpu	: input depth map data
dtr	: the current working depth level
d1	: the starting physical point of each depth level
d2	: the ending physical point of each depth level
params_num_of_depth	: the number of depth level
params_far_depthmap	: NEAR_OF_DEPTH_MAP at config file
params_near_depthmap	: FAR_OF_DEPTH_MAP at config file

See also

change_depth_quan_GPU

cudaCropFringe()

void cudaCropFringe	(	CUstream_st *	stream,
		int	nx,
		int	ny,
		cufftDoubleComplex *	in_field,
		cufftDoubleComplex *	out_field,
		int	cropx1,
		int	cropx2,
		int	cropy1,
		int	cropy2
	)

call CUDA Kernel - cropFringe.

Parameters

stream	: CUDA Stream
nx	: the number of column of the input data
ny	: the number of row of the input data
in_field	: input complex data variable
output_field	: output complex data variable
cropx1	: the start x-coordinate to crop.
cropx2	: the end x-coordinate to crop.
cropy1	: the start y-coordinate to crop.
cropy2	: the end y-coordinate to crop.

See also

encoding_GPU

cudaDepthHoloKernel()

void cudaDepthHoloKernel	(	CUstream_st *	stream,
		int	pnx,
		int	pny,
		cufftDoubleComplex *	u_o_gpu_,
		unsigned char *	img_src_gpu_,
		unsigned char *	dimg_src_gpu_,
		double *	depth_index_gpu_,
		int	dtr,
		double	rand_phase_val_a,
		double	rand_phase_val_b,
		double	carrier_phase_delay_a,
		double	carrier_phase_delay_b,
		int	flag_change_depth_quan,
		unsigned int	default_depth_quan
	)

call CUDA Kernel - depth_sources_kernel.

Parameters

stream	: CUDA Stream
nx	: the number of column of the input data
ny	: the number of row of the input data
u_o_gpu_	: output variable
img_src_gpu_	: input image data
dimg_src_gpu_	: input depth map data
depth_index_gpu_	: input quantized depth map data
dtr	: current working depth level
rand_phase_val_a	: the real part of the random phase value
rand_phase_val_b	: the imaginary part of the random phase value
carrier_phase_delay_a	: the real part of the carrier phase delay
carrier_phase_delay_b	: the imaginary part of the carrier phase delay
flag_change_depth_quan	: if true, change the depth quantization from the default value.
default_depth_quan	: default value of the depth quantization - 256

See also

Calc_Holo_GPU

cudaFFT()

void cudaFFT	(	CUstream_st *	stream,
		int	nx,
		int	ny,
		cufftDoubleComplex *	in_filed,
		cufftDoubleComplex *	output_field,
		int	direction,
		bool	bNormailized = false
	)

call CUDA Kernel - fftShift and CUFFT Library.

Parameters

stream	: CUDA Stream
nx	: the number of column of the input data
ny	: the number of row of the input data
in_field	: input complex data variable
output_field	: output complex data variable
direction	: If direction == -1, forward FFT, if type == 1, inverse FFT.
bNomarlized	: If bNomarlized == true, normalize the result after FFT.

See also

Propagation_AngularSpectrum_GPU, encoding_GPU

cudaGetFringe()

void cudaGetFringe	(	CUstream_st *	stream,
		int	pnx,
		int	pny,
		cufftDoubleComplex *	in_field,
		cufftDoubleComplex *	out_field,
		int	sig_locationx,
		int	sig_locationy,
		double	ssx,
		double	ssy,
		double	ppx,
		double	ppy,
		double	PI
	)

The variable, u255_fringe_ has the final result.

Parameters

stream	: CUDA Stream
pnx	: the number of column of the input data
pny	: the number of row of the input data
in_field	: input data
out_field	: output data
sig_locationx	: signal location of x-axis, left or right half
sig_locationy	: signal location of y-axis, upper or lower half
ssx	: pnx * ppx
ssy	: pny * ppy
ppx	: pixel pitch of x-axis
ppy	: pixel pitch of y-axis
PI	: Pi

See also

encoding_GPU

cudaPropagation_AngularSpKernel()

void cudaPropagation_AngularSpKernel	(	CUstream_st *	stream_,
		int	pnx,
		int	pny,
		cufftDoubleComplex *	input_d,
		cufftDoubleComplex *	u_complex,
		double	ppx,
		double	ppy,
		double	ssx,
		double	ssy,
		double	lambda,
		double	params_k,
		double	propagation_dist
	)

The propagation results of all depth levels are accumulated in the variable 'u_complex_gpu_'.

Parameters

stream	: CUDA Stream
pnx	: the number of column of the input data
pny	: the number of row of the input data
input_d	: input data
u_complex	: output data
ppx	: pixel pitch of x-axis
ppy	: pixel pitch of y-axis
ssx	: pnx * ppx
ssy	: pny * ppy
lambda	: wavelength
params_k	: 2 * PI / lambda
propagation_dist	: the distance from the object to the hologram plane

See also

Propagation_AngularSpectrum_GPU