preProcess_fp32() - preProcess_fp32()

API Syntax

template <int IN_TYPE,
          int OUT_TYPE,
          int HEIGHT,
          int WIDTH,
          int NPC,
          int XFCVDEPTH_IN = _XFCVDEPTH_DEFAULT,
          int XFCVDEPTH_OUT = _XFCVDEPTH_DEFAULT>
void preProcess_fp32(xf::cv::Mat<IN_TYPE, HEIGHT, WIDTH, NPC, XFCVDEPTH_IN>& in_mat,
                     xf::cv::Mat<OUT_TYPE, HEIGHT, WIDTH, NPC, XFCVDEPTH_OUT>& out_mat,
                     float params[2 * XF_CHANNELS(IN_TYPE, NPC)]);

preProcess Template Parameter Descriptions

The following table describes the common template parameters for all preProcess_* variants. Implementations are in L1/include/dnn/xf_preprocess_generic.hpp.

Resource Utilization

The following table summarizes resource utilization for a 1920 x 1080 image, as generated in the Vitis HLS 2026.1 tool for Versal AI Edge at 300 MHz.

Table 101 Table: preprocess_accel Resource Utilization Summary
Function Config	Image Size	Frequency (MHz)	NPC	LUT	FF	DSP	URAM
INT8	1920 x 1080	300	4	3282	2138	17	0
BF16, FP16	1920 x 1080	300	4	6866	2238	1	0
FP32	1920 x 1080	300	4	9672	7547	77	30

Performance Estimate

The following table summarizes the latency estimates for a Full HD (1920 x 1080) image at 300 MHz.

Table 102 Table: preprocess_accel Performance Estimate Summary
Operating Mode	Operating Frequency (MHz)	Latency Estimate Max (ms)
4 pixel (NPC4)	300	1.8
2 pixel (NPC2)	300	3.6
1 pixel (NPC1)	300	7.0

preProcess_fp32() - preProcess_fp32() - 2026.1 English

Vitis Libraries