skimage¶
Image Processing SciKit (Toolbox for SciPy)
scikits-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
- Image drawing primitives (lines, text, etc.).
- exposure
- Image intensity adjustment (e.g., histogram equalization).
- feature
- Feature detection (e.g. texture analysis, corners, etc.).
- filter
- Sharpening, edge finding, denoising, etc.
- graph
- Graph-theoretic operations, e.g. dynamic programming (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.
- segmentation
- Splitting an image into self-similar regions.
- transform
- Geometric and other transforms, e.g. rotation or the Radon transform.
- util
- Generic utilities.
Utility Functions¶
- get_log
- Returns the skimage log. Use this to print debug output.
- 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.get_log([name]) | Return a console logger. |
| 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. |
get_log¶
- skimage.get_log(name=None)¶
Return a console logger.
Output may be sent to the logger using the debug, info, warning, error and critical methods.
Parameters : name : str
Name of the log.
References
[R2] Logging facility for Python, http://docs.python.org/library/logging.html
img_as_float¶
- skimage.img_as_float(image, force_copy=False)¶
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, 1]. Negative input values will be shifted to the positive domain.
img_as_int¶
- skimage.img_as_int(image, force_copy=False)¶
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
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)¶
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
If the input data-type is positive-only (e.g., uint16), then the output image will still only have positive values.
img_as_uint¶
- skimage.img_as_uint(image, force_copy=False)¶
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 shifted to the positive domain.