mmcv.image.adjust_contrast¶
- mmcv.image.adjust_contrast(img, factor=1.0, backend=None)[源代码]¶
Adjust image contrast.
This function controls the contrast of an image. An enhancement factor of 0.0 gives a solid grey image. A factor of 1.0 gives the original image. It blends the source image and the degenerated mean image:
\[output = img * factor + degenerated * (1 - factor)\]- 参数
img (ndarray) – Image to be contrasted. BGR order.
factor (float) – Same as
mmcv.adjust_brightness()
.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 contrasted image.
- 返回类型
ndarray