Mirroring labeled images

[matroskin313]

Hi,
I need to mirror horizontally already labeled photos in Labelimg with annotation files to use it in YOLOv4 darknet.
So I could icrease the number of photos and objects.
Could you give me any idea how I could make it fast?
Is there any apps or one way is to write the code?

Thank you for help.

[stephanecharette]

See: https://www.ccoderun.ca/darkmark/DataAugmentationMisc.html#Flip

[matroskin313]

thank you

[matroskin313]

Hello,
Don't you know, does this flip=1 exist in cfg file by default?
I added it, but mAP is the same