CODEWITHSUNDEEP
c++opencv
Bikoo Naveen
Bikoo Naveen

Reputation: 11

OpenCV imwrite not writing image

I was trying to write an image to a folder using OpenCV imwrite function. The code compiles and runs successfully but the image is not saving in the folder/path.I am getting output from 'imshow' and my image is in CV_8UC1 format.

find the code below

    Mat reflection = function which computes image
    imshow("output image", reflection);
    imwrite("E:/New folder/img.bmp", reflection);

so I checked current folder writing and modified code like this

bool check = imwrite("./img.bmp", reflection);

this 'bool check' status is 'false' and not writing the image.

I've also checked folder permission with guidelines from microsoft help my "E/New Folder/" is permitted to write. still, the image is not saving. I am okay with any image format .jpg, .png and .bmp. I am using windows 7, OpenCV 3.0, visual studio 2017.

Please help me and thanks for reading it

Upvotes: 0

Views: 7880

Answers (2)

Ashantha Lahiru
Ashantha Lahiru

Reputation: 1

OpenCV do support bmp, just use as follows.

bool check = imwrite("img.bmp", reflection);

Upvotes: 0

Javonne Martin
Javonne Martin

Reputation: 86

Opencv doesn't seem to support saving BMP files check the imwrite docs. Changing the filename to img.png should work. Also using ./ in windows is not valid, this is used in unix systems to represent the current working directory see Windows current directory. Updating it to 

bool check = imwrite(".\img.png", reflection);

or 

bool check = imwrite("img.png", reflection);

Should work

Upvotes: 2

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