mmcv.image.adjust_brightness¶
- mmcv.image.adjust_brightness(img, factor=1.0, backend=None)[源代码]¶
Adjust image brightness.
This function controls the brightness of an image. An enhancement factor of 0.0 gives a black image. A factor of 1.0 gives the original image. This function blends the source image and the degenerated black image:
\[output = img * factor + degenerated * (1 - factor)\]- 参数
img (ndarray) – Image to be brightened.
factor (float) – A value controls the enhancement. Factor 1.0 returns the original image, lower factors mean less color (brightness, contrast, etc), and higher values more. Default 1.
backend (str | None) – The image processing backend type. Options are cv2, pillow, None. If backend is None, the global
imread_backend
specified bymmcv.use_backend()
will be used. Defaults to None.
- 返回
The brightened image.
- 返回类型
ndarray