CODEWITHSUNDEEP
c++opencv
Eren V.
Eren V.

Reputation: 210

opencv imencode() buffer exception

I am using these codes for encode Mat image to .jpg format. It is working with small images, but when I put a large image, project give exception

Unhandled exception at 0x76377fb2 (ucrtbase.dll) in ImageRecognition.exe: 0xC0000409: 0xc0000409.

I am using opencv2.4.12 in Visual Studio 2015 and my OS is Windows 10 here is my code block.

cv::threshold(image, image, 100, 255, cv::THRESH_BINARY + cv::THRESH_OTSU);
std::vector<uchar> buf;
imencode(".jpg", image, buf);

Upvotes: 4

Views: 14533

Answers (2)

Eren V.
Eren V.

Reputation: 210

Some opportunities to solve this problem :

try to allocate buffer before call std::vector<uchar> buf(50000); I used this solution it is worked for me. I will upgrade my opencv version to 3.2 as soon as possible

good idea update to opencv 3.2

Upvotes: 2

skyforce Shen
skyforce Shen

Reputation: 41

try reserve memory before call imencode() :

std::vector<uchar> buffer;
#define MB 1024*1024
buffer.resize(200* MB);
cv::imencode(".png", image, buffer);

Upvotes: 2

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