skimage
skimage
Image Processing SciKit (Toolbox for SciPy)
scikit-image
(a.k.a. skimage
) is a collection of algorithms for image processing and computer vision.
The main package of skimage
only provides a few utilities for converting between image data types; for most features, you need to import one of the following subpackages:
Subpackages
- color
- Color space conversion.
- data
- Test images and example data.
- draw
- Drawing primitives (lines, text, etc.) that operate on NumPy arrays.
- exposure
- Image intensity adjustment, e.g., histogram equalization, etc.
- feature
- Feature detection and extraction, e.g., texture analysis corners, etc.
- filters
- Sharpening, edge finding, rank filters, thresholding, etc.
- graph
- Graph-theoretic operations, e.g., shortest paths.
- io
- Reading, saving, and displaying images and video.
- measure
- Measurement of image properties, e.g., similarity and contours.
- morphology
- Morphological operations, e.g., opening or skeletonization.
- novice
- Simplified interface for teaching purposes.
- restoration
- Restoration algorithms, e.g., deconvolution algorithms, denoising, etc.
- segmentation
- Partitioning an image into multiple regions.
- transform
- Geometric and other transforms, e.g., rotation or the Radon transform.
- util
- Generic utilities.
- viewer
- A simple graphical user interface for visualizing results and exploring parameters.
Utility Functions
- img_as_float
- Convert an image to floating point format, with values in [0, 1].
- img_as_uint
- Convert an image to unsigned integer format, with values in [0, 65535].
- img_as_int
- Convert an image to signed integer format, with values in [-32768, 32767].
- img_as_ubyte
- Convert an image to unsigned byte format, with values in [0, 255].
skimage.dtype_limits (image[, clip_negative]) | Return intensity limits, i.e. |
skimage.img_as_bool (image[, force_copy]) | Convert an image to boolean format. |
skimage.img_as_float (image[, force_copy]) | Convert an image to double-precision floating point format. |
skimage.img_as_int (image[, force_copy]) | Convert an image to 16-bit signed integer format. |
skimage.img_as_ubyte (image[, force_copy]) | Convert an image to 8-bit unsigned integer format. |
skimage.img_as_uint (image[, force_copy]) | Convert an image to 16-bit unsigned integer format. |
skimage.test ([doctest, verbose]) | Run all unit tests. |
dtype_limits
-
skimage.dtype_limits(image, clip_negative=True)
[source] -
Return intensity limits, i.e. (min, max) tuple, of the image’s dtype.
Parameters: image : ndarray
Input image.
clip_negative : bool
If True, clip the negative range (i.e. return 0 for min intensity) even if the image dtype allows negative values.
img_as_bool
-
skimage.img_as_bool(image, force_copy=False)
[source] -
Convert an image to boolean format.
Parameters: image : ndarray
Input image.
force_copy : bool
Force a copy of the data, irrespective of its current dtype.
Returns: out : ndarray of bool (
bool_
)Output image.
Notes
The upper half of the input dtype’s positive range is True, and the lower half is False. All negative values (if present) are False.
img_as_float
-
skimage.img_as_float(image, force_copy=False)
[source] -
Convert an image to double-precision floating point format.
Parameters: image : ndarray
Input image.
force_copy : bool
Force a copy of the data, irrespective of its current dtype.
Returns: out : ndarray of float64
Output image.
Notes
The range of a floating point image is [0.0, 1.0] or [-1.0, 1.0] when converting from unsigned or signed datatypes, respectively.
img_as_int
-
skimage.img_as_int(image, force_copy=False)
[source] -
Convert an image to 16-bit signed integer format.
Parameters: image : ndarray
Input image.
force_copy : bool
Force a copy of the data, irrespective of its current dtype.
Returns: out : ndarray of uint16
Output image.
Notes
The values are scaled between -32768 and 32767. If the input data-type is positive-only (e.g., uint8), then the output image will still only have positive values.
img_as_ubyte
-
skimage.img_as_ubyte(image, force_copy=False)
[source] -
Convert an image to 8-bit unsigned integer format.
Parameters: image : ndarray
Input image.
force_copy : bool
Force a copy of the data, irrespective of its current dtype.
Returns: out : ndarray of ubyte (uint8)
Output image.
Notes
Negative input values will be clipped. Positive values are scaled between 0 and 255.
img_as_uint
-
skimage.img_as_uint(image, force_copy=False)
[source] -
Convert an image to 16-bit unsigned integer format.
Parameters: image : ndarray
Input image.
force_copy : bool
Force a copy of the data, irrespective of its current dtype.
Returns: out : ndarray of uint16
Output image.
Notes
Negative input values will be clipped. Positive values are scaled between 0 and 65535.
test
-
skimage.test(doctest=False, verbose=False)
[source] -
Run all unit tests.
© 2011 the scikit-image team
Licensed under the BSD 3-clause License.
http://scikit-image.org/docs/0.12.x/api/skimage.html