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encode_demo.py
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encode_demo.py
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#!/usr/bin/env python3
# -*- encoding: utf-8 -*-
# Note, the encode of cv2 is surprisingly quick
# And restart_interval should be chosen according to image size
import sys
import cv2
import time
import numpy as np
sys.path.append('./build')
import GPUJPEG_Encoder
if len(sys.argv) < 3:
print('Usage: python3 encode_demo.py <input_image_file> <restart_interval>')
exit()
in_f = sys.argv[1]
im = cv2.imread(in_f)
restart_interval = int(sys.argv[2])
gpu_encoder = GPUJPEG_Encoder.Encoder(height=720,
width=1280,
restart_interval=restart_interval)
N = 100
t0 = time.perf_counter()
for _ in range(N):
buf = gpu_encoder.encode(im)
print(f'GPU time used:{(time.perf_counter()-t0)*1000: .2f} ms')
buf_npy = np.fromstring(buf, np.uint8)
# im_b2 = cv2.imdecode(buf_npy, cv2.IMREAD_COLOR)
im_b2 = cv2.imdecode(buf_npy, cv2.IMREAD_UNCHANGED)
im_b2 = cv2.cvtColor(im_b2, cv2.COLOR_RGB2BGR)
cv2.imwrite('encode_gpu_py.jpg', im_b2)
t0 = time.perf_counter()
for _ in range(N):
buf_npy = cv2.imencode('.jpg', im)[1]
print(f'CV2 time used:{(time.perf_counter()-t0)*1000: .2f} ms')
buf_npy = np.array(buf_npy)
# im_b = cv2.imdecode(buf_npy, cv2.IMREAD_COLOR)
im_b = cv2.imdecode(buf_npy, cv2.IMREAD_UNCHANGED)
cv2.imwrite('encode_cv2_py.jpg', im_b)