In this post i m sharing a couple of very simple tricks to perform an efficient rotate or flip mirror operation on opencv mat images.
Image flipped when converted to mat.
Android image bitmap mat.
The jpg images converted to mat files are used to plot labelled temperature contours.
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And it has been observed that when the conversion produces a single field the labelled temperatures are inaccurate whereas when 5 fields are produced as is the case when using the load filename mat command the temperatures are correct.
Output array that has the same size and type as the input array.
Obviously you ll start by reading an image from disk or grab it from a video frame and so on similar to this.
Bitwise not dst cv bitwise not src dst mask inverts every bit of an array.
Finally be sure to always consider the fact that a mat will add to the final dimensions of your finished piece so if you re artwork is 11x14 you final framed piece with a mat could be around 17x20 depending on your mat size and make sure that the space in which you are hanging your artwork can accommodate the size increase.
Now i want to load the images from the data to use them but its a struct so i tried converting using struct2cell and that didn t get me anywhere.
I know that i can pass by the bitmap class but i don t know how to convert an image into bitmap too.
Share improve this question follow edited jun 17 15 at 16 06.
After that depending on the required transformation use any of the continue reading how to rotate and or flip mirror images in opencv.
I have this function which i used to save a folder of images into a mat file as a database.