加载中…opencvimencode和imdecode使用，用于网络传输图片
(2018-12-06 16:21:59)| 分类： c#c c |
转:https://blog.csdn.net/tt_ren/article/details/53227900
这是C++版本的。程序首先读入一个图片。然后encode，之后把encode后的内容写入文件（实际应用可以发送到网络）。
第二步，从文件读取encode的内容。然后解码decode。转换为mat格式，显示出来。
#include
#include
#include
#include
#include
#include
#include
using namespace boost::filesystem;
namespace newfs = boost::filesystem;
using namespace cv;
int main(int argc, char ** argv)
{
cv::Mat
img_encode;
img_encode =
imread("../res/test.png", CV_LOAD_IMAGE_COLOR);
//encode
image and save to file
std::vector
data_encode;
imencode(".png", img_encode, data_encode);
std::string
str_encode(data_encode.begin(), data_encode.end());
path
p("../res/imgencode_cplus.txt");
newfs::ofstream ofs(p);
assert(ofs.is_open());
ofs <<
str_encode;
ofs.flush();
ofs.close();
//read image
encode file and display
newfs::fstream ifs(p);
assert(ifs.is_open());
std::stringstream sstr;
while(ifs
>> sstr.rdbuf());
ifs.close();
Mat
img_decode;
std::string
str_tmp = sstr.str();
std::vector
data(str_tmp.begin(), str_tmp.end());
img_decode =
imdecode(data, CV_LOAD_IMAGE_COLOR);
imshow("pic",img_decode);
cvWaitKey(10000);
return
0;
}
#include
#include
#include
#include
#include
#include
using namespace boost::filesystem;
namespace newfs = boost::filesystem;
using namespace cv;
int main(int argc, char ** argv)
{
}
使用python的例子。
import sys
import cv2
import numpy as np
def img_endecode( img):
#type img:
cv::mat
#encode
image from cv::mat
img_encode =
cv2.imencode('.png', img)[1]
data_encode
= np.array(img_encode)
str_encode =
data_encode.tostring()
#save to
file
fw =
open('img_encode.txt', 'w')
fw.write(str_encode)
fw.flush
fw.close
#decode and
display
nparr =
np.fromstring(str_encode, np.uint8)
img_decode =
cv2.imdecode(nparr, 1)
cv2.imshow("img_decode", img_decode)
cv2.waitKey(10000)
import cv2
import numpy as np
def img_endecode( img):
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