.ppm images saved incorrectly using opencv

Question

I am capturing images from a camera and save using opencv as follows.

cv::Mat leftImage(height, width, CV_8UC3);
//capturing image here
vector<int> compression_params;
compression_params.push_back(CV_IMWRITE_PXM_BINARY);
compression_params.push_back(1);

 //writing as ppm image
 cv::imwrite("Image_1.ppm", leftImage, compression_params);

When saved as .png the image looks good. But saving as .ppm is not giving the expected result. Thanks in advance.

See if [this](https://stackoverflow.com/a/23802333/5008845). Otherwise the format is so simple that's maybe easier to write your own save/load — Miki, May 26 '17 at 17:02

SDD123 · Accepted Answer · 2017-06-02T13:42:09.500

1

Solved!!!

A conversion from BRGA to BGR did the trick.

cv::Mat leftImage;
cvtColor(leftImage, leftImage, COLOR_BGRA2BGR);

edited Jun 02 '17 at 13:42

answered May 31 '17 at 10:50

SDD123

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That's odd - your code shows a 3-channel `CV_8UC3` which wouldn't have an alpha channel (`BGRA`), just `BGR`. – Mark Setchell May 31 '17 at 11:39

.ppm images saved incorrectly using opencv

1 Answers1