Why is it reverse to convert from other formats to BMP

Why switch from other formats to BMP It's the opposite

Often from RGB、Raw、YUV Format data to BMP picture , But it is often found that the picture is reversed
reason ：BMP The image data starts from the lower left corner , Subjective general image data starts from the upper left corner , So up and down is the opposite , and BMP yes BGR Sort , It often leads me to doubt whether the channel is wrong