9i \SSKrSSKJr SSKJr \R "SS9S SS .S jj5rg) N)_felzenszwalb_cython)utilsF)multichannel_output) channel_axisc~UcURS:a [S5e[R"U5n[ XX#S9$)aComputes Felsenszwalb's efficient graph based image segmentation. Produces an oversegmentation of a multichannel (i.e. RGB) image using a fast, minimum spanning tree based clustering on the image grid. The parameter ``scale`` sets an observation level. Higher scale means less and larger segments. ``sigma`` is the diameter of a Gaussian kernel, used for smoothing the image prior to segmentation. The number of produced segments as well as their size can only be controlled indirectly through ``scale``. Segment size within an image can vary greatly depending on local contrast. For RGB images, the algorithm uses the euclidean distance between pixels in color space. Parameters ---------- image : (M, N[, 3]) ndarray Input image. scale : float Free parameter. Higher means larger clusters. sigma : float Width (standard deviation) of Gaussian kernel used in preprocessing. min_size : int Minimum component size. Enforced using postprocessing. channel_axis : int or None, optional If None, the image is assumed to be a grayscale (single channel) image. Otherwise, this parameter indicates which axis of the array corresponds to channels. .. versionadded:: 0.19 ``channel_axis`` was added in 0.19. Returns ------- segment_mask : (M, N) ndarray Integer mask indicating segment labels. References ---------- .. [1] Efficient graph-based image segmentation, Felzenszwalb, P.F. and Huttenlocher, D.P. International Journal of Computer Vision, 2004 Notes ----- The `k` parameter used in the original paper renamed to `scale` here. Examples -------- >>> from skimage.segmentation import felzenszwalb >>> from skimage.data import coffee >>> img = coffee() >>> segments = felzenszwalb(img, scale=3.0, sigma=0.95, min_size=5) rz@This algorithm works only on single or multi-channel 2d images. )scalesigmamin_size)ndim ValueErrornp atleast_3dr)imager r r r s b/var/www/html/land-doc-ocr/venv/lib/python3.13/site-packages/skimage/segmentation/_felzenszwalb.py felzenszwalbrsBp Q Q   MM% E % SS)rg?)numpyr_felzenszwalb_cyr_sharedrchannel_as_last_axisrrrrs726=T=T7=Tr