torchio.visualization.plot_volume() - Code Metrics - Inspection of "Add plot_volume indices parameter" - fepegar/torchio - Measure and Improve Code Quality continuously with Scrutinizer

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Pull Request — master (#682)

unknown

created 2021-10-06 13:07 UTC

torchio.visualization.plot_volume() D

↳ Parent: torchio.visualization

Complexity

Conditions

Size

Total Lines	88
Code Lines	57

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
eloc	57
dl	0
loc	88
rs	4.7672
c	0
b	0
f	0
cc	12
nop	12

How to fix Long Method Complexity Many Parameters

Long Method

Small methods make your code easier to understand, in particular if combined with a good name. Besides, if your method is small, finding a good name is usually much easier.

For example, if you find yourself adding comments to a method's body, this is usually a good sign to extract the commented part to a new method, and use the comment as a starting point when coming up with a good name for this new method.

Commonly applied refactorings include:

If many parameters/temporary variables are present:
- Replace temporary variables with Query
- Introduce parameter object; often combined with preserve whole object
- If the above two are insufficient: Replace method with method object
If you have long conditionals: Decompose Conditional
Otherwise: Extract method

Complexity

Complex classes like torchio.visualization.plot_volume() often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.

Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.

Many Parameters

Methods with many parameters are not only hard to understand, but their parameters also often become inconsistent when you need more, or different data.

There are several approaches to avoid long parameter lists:

If you can get the data from another object that the method knows about already: Replace the parameter with method call
If several parameters are part of another object: Preserve Whole Object
If parameters are not yet connected: Introduce Parameter Object

import warnings

import torch
import numpy as np

from .typing import TypePath
from .data.subject import Subject
from .data.image import Image, LabelMap
from .transforms.preprocessing.spatial.to_canonical import ToCanonical
from .transforms.preprocessing.intensity.rescale import RescaleIntensity


def import_mpl_plt():
    try:
        import matplotlib as mpl
        import matplotlib.pyplot as plt
    except ImportError as e:
        raise ImportError('Install matplotlib for plotting support') from e
    return mpl, plt


def rotate(image, radiological=True, n=-1):
    # Rotate for visualization purposes
    image = np.rot90(image, n)
    if radiological:
        image = np.fliplr(image)
    return image


def plot_volume(
        image: Image,
        radiological=True,
        channel=-1,  # default to foreground for binary maps
        axes=None,
        cmap=None,
        output_path=None,
        show=True,
        xlabels=True,
        percentiles=(0.5, 99.5),
        figsize=None,
        reorient=True,
        indices=None,
        ):
    _, plt = import_mpl_plt()
    fig = None
    if axes is None:
        fig, axes = plt.subplots(1, 3, figsize=figsize)
    sag_axis, cor_axis, axi_axis = axes

    if reorient:
        image = ToCanonical()(image)
    data = image.data[channel]
    if indices is None:
        indices = np.array(data.shape) // 2
    i, j, k = indices
    slice_x = rotate(data[i, :, :], radiological=radiological)
    slice_y = rotate(data[:, j, :], radiological=radiological)
    slice_z = rotate(data[:, :, k], radiological=radiological)
    kwargs = {}
    is_label = isinstance(image, LabelMap)
    if isinstance(cmap, dict):
        slices = slice_x, slice_y, slice_z
        slice_x, slice_y, slice_z = color_labels(slices, cmap)
    else:
        if cmap is None:
            cmap = 'cubehelix' if is_label else 'gray'
        kwargs['cmap'] = cmap
    if is_label:
        kwargs['interpolation'] = 'none'

    sr, sa, ss = image.spacing
    kwargs['origin'] = 'lower'

    if percentiles is not None:
        p1, p2 = np.percentile(data, percentiles)
        kwargs['vmin'] = p1
        kwargs['vmax'] = p2

    sag_aspect = ss / sa
    sag_axis.imshow(slice_x, aspect=sag_aspect, **kwargs)
    '''
    if xlabels:
        sag_axis.set_xlabel('A')
    sag_axis.set_ylabel('S')
    sag_axis.invert_xaxis()
    sag_axis.set_title('Sagittal')
    '''

    cor_aspect = ss / sr
    cor_axis.imshow(slice_y, aspect=cor_aspect, **kwargs)
    '''
    if xlabels:
        cor_axis.set_xlabel('R')
    cor_axis.set_ylabel('S')
    cor_axis.invert_xaxis()
    cor_axis.set_title('Coronal')
    '''

    axi_aspect = sa / sr
    axi_axis.imshow(slice_z, aspect=axi_aspect, **kwargs)
    '''
    if xlabels:
        axi_axis.set_xlabel('R')
    axi_axis.set_ylabel('A')
    axi_axis.invert_xaxis()
    axi_axis.set_title('Axial')
    '''
    
    sag_axis.axis('off')
    cor_axis.axis('off')
    axi_axis.axis('off')

    plt.tight_layout()
    if output_path is not None and fig is not None:
        fig.savefig(output_path, transparent=True)
    if show:
        plt.show()


def plot_subject(
        subject: Subject,
        cmap_dict=None,
        show=True,
        output_path=None,
        figsize=None,
        clear_axes=True,
        **kwargs,
        ):
    _, plt = import_mpl_plt()
    num_images = len(subject)
    many_images = num_images > 2
    subplots_kwargs = {'figsize': figsize}
    try:
        if clear_axes:
            subject.check_consistent_spatial_shape()
            subplots_kwargs['sharex'] = 'row' if many_images else 'col'
            subplots_kwargs['sharey'] = 'row' if many_images else 'col'
    except RuntimeError:  # different shapes in subject
        pass
    args = (3, num_images) if many_images else (num_images, 3)
    fig, axes = plt.subplots(*args, **subplots_kwargs)
    # The array of axes must be 2D so that it can be indexed correctly within
    # the plot_volume() function
    axes = axes.T if many_images else axes.reshape(-1, 3)
    iterable = enumerate(subject.get_images_dict(intensity_only=False).items())
    axes_names = 'sagittal', 'coronal', 'axial'
    for image_index, (name, image) in iterable:
        image_axes = axes[image_index]
        cmap = None
        if cmap_dict is not None and name in cmap_dict:
            cmap = cmap_dict[name]
        last_row = image_index == len(axes) - 1
        plot_volume(
            image,
            axes=image_axes,
            show=False,
            cmap=cmap,
            xlabels=last_row,
            **kwargs,
        )
        for axis, axis_name in zip(image_axes, axes_names):
            axis.set_title(f'{name} ({axis_name})')
    plt.tight_layout()
    if output_path is not None:
        fig.savefig(output_path)
    if show:
        plt.show()
    plt.close(fig) 


def color_labels(arrays, cmap_dict):
    results = []
    for array in arrays:
        si, sj = array.shape
        rgb = np.zeros((si, sj, 3), dtype=np.uint8)
        for label, color in cmap_dict.items():
            if isinstance(color, str):
                mpl, _ = import_mpl_plt()
                color = mpl.colors.to_rgb(color)
                color = [255 * n for n in color]
            rgb[array == label] = color
        results.append(rgb)
    return results


def make_gif(
        tensor: torch.Tensor,
        axis: int,
        duration: float,  # of full gif
        output_path: TypePath,
        loop: int = 0,
        optimize: bool = True,
        rescale: bool = True,
        reverse: bool = False,
        ) -> None:
    try:
        from PIL import Image as ImagePIL
    except ModuleNotFoundError as e:
        message = (
            'Please install Pillow to use Image.to_gif():'
            ' pip install Pillow'
        )
        raise RuntimeError(message) from e
    tensor = RescaleIntensity((0, 255))(tensor) if rescale else tensor
    single_channel = len(tensor) == 1

    # Move channels dimension to the end and bring selected axis to 0
    axes = np.roll(range(1, 4), -axis)
    tensor = tensor.permute(*axes, 0)

    if single_channel:
        mode = 'P'
        tensor = tensor[..., 0]
    else:
        mode = 'RGB'
    array = tensor.byte().numpy()
    n = 2 if axis == 1 else 1
    images = [ImagePIL.fromarray(rotate(i, n=n)).convert(mode) for i in array]
    num_images = len(images)
    images = list(reversed(images)) if reverse else images
    frame_duration_ms = duration / num_images * 1000
    if frame_duration_ms < 10:
        fps = round(1000 / frame_duration_ms)
        frame_duration_ms = 10
        new_duration = frame_duration_ms * num_images / 1000
        message = (
            'The computed frame rate from the given duration is too high'
            f' ({fps} fps). The highest possible frame rate in the GIF'
            ' file format specification is 100 fps. The duration has been set'
            f' to {new_duration:.1f} seconds, instead of {duration:.1f}'
        )
        warnings.warn(message)
    images[0].save(
        output_path,
        save_all=True,
        append_images=images[1:],
        optimize=optimize,
        duration=frame_duration_ms,
        loop=loop,
    )


1			import warnings
2
3			import torch
4			import numpy as np
5
6			from .typing import TypePath
7			from .data.subject import Subject
8			from .data.image import Image, LabelMap
9			from .transforms.preprocessing.spatial.to_canonical import ToCanonical
10			from .transforms.preprocessing.intensity.rescale import RescaleIntensity
11
12
13			def import_mpl_plt():
14			try:
15			import matplotlib as mpl
16			import matplotlib.pyplot as plt
17			except ImportError as e:
18			raise ImportError('Install matplotlib for plotting support') from e
19			return mpl, plt
20
21
22			def rotate(image, radiological=True, n=-1):
23			# Rotate for visualization purposes
24			image = np.rot90(image, n)
25			if radiological:
26			image = np.fliplr(image)
27			return image
28
29
30			def plot_volume(
31			image: Image,
32			radiological=True,
33			channel=-1, # default to foreground for binary maps
34			axes=None,
35			cmap=None,
36			output_path=None,
37			show=True,
38			xlabels=True,
39			percentiles=(0.5, 99.5),
40			figsize=None,
41			reorient=True,
42			indices=None,
43			):
44			_, plt = import_mpl_plt()
45			fig = None
46			if axes is None:
47			fig, axes = plt.subplots(1, 3, figsize=figsize)
48			sag_axis, cor_axis, axi_axis = axes
49
50			if reorient:
51			image = ToCanonical()(image)
52			data = image.data[channel]
53			if indices is None:
54			indices = np.array(data.shape) // 2
55			i, j, k = indices
56			slice_x = rotate(data[i, :, :], radiological=radiological)
57			slice_y = rotate(data[:, j, :], radiological=radiological)
58			slice_z = rotate(data[:, :, k], radiological=radiological)
59			kwargs = {}
60			is_label = isinstance(image, LabelMap)
61			if isinstance(cmap, dict):
62			slices = slice_x, slice_y, slice_z
63			slice_x, slice_y, slice_z = color_labels(slices, cmap)
64			else:
65			if cmap is None:
66			cmap = 'cubehelix' if is_label else 'gray'
67			kwargs['cmap'] = cmap
68			if is_label:
69			kwargs['interpolation'] = 'none'
70
71			sr, sa, ss = image.spacing
72			kwargs['origin'] = 'lower'
73
74			if percentiles is not None:
75			p1, p2 = np.percentile(data, percentiles)
76			kwargs['vmin'] = p1
77			kwargs['vmax'] = p2
78
79			sag_aspect = ss / sa
80			sag_axis.imshow(slice_x, aspect=sag_aspect, **kwargs)
81			'''
82			if xlabels:
83			sag_axis.set_xlabel('A')
84			sag_axis.set_ylabel('S')
85			sag_axis.invert_xaxis()
86			sag_axis.set_title('Sagittal')
87			'''
88
89			cor_aspect = ss / sr
90			cor_axis.imshow(slice_y, aspect=cor_aspect, **kwargs)
91			'''
92			if xlabels:
93			cor_axis.set_xlabel('R')
94			cor_axis.set_ylabel('S')
95			cor_axis.invert_xaxis()
96			cor_axis.set_title('Coronal')
97			'''
98
99			axi_aspect = sa / sr
100			axi_axis.imshow(slice_z, aspect=axi_aspect, **kwargs)
101			'''
102			if xlabels:
103			axi_axis.set_xlabel('R')
104			axi_axis.set_ylabel('A')
105			axi_axis.invert_xaxis()
106			axi_axis.set_title('Axial')
107			'''
108
109			sag_axis.axis('off')
110			cor_axis.axis('off')
111			axi_axis.axis('off')
112
113			plt.tight_layout()
114			if output_path is not None and fig is not None:
115			fig.savefig(output_path, transparent=True)
116			if show:
117			plt.show()
118
119
120			def plot_subject(
121			subject: Subject,
122			cmap_dict=None,
123			show=True,
124			output_path=None,
125			figsize=None,
126			clear_axes=True,
127			**kwargs,
128			):
129			_, plt = import_mpl_plt()
130			num_images = len(subject)
131			many_images = num_images > 2
132			subplots_kwargs = {'figsize': figsize}
133			try:
134			if clear_axes:
135			subject.check_consistent_spatial_shape()
136			subplots_kwargs['sharex'] = 'row' if many_images else 'col'
137			subplots_kwargs['sharey'] = 'row' if many_images else 'col'
138			except RuntimeError: # different shapes in subject
139			pass
140			args = (3, num_images) if many_images else (num_images, 3)
141			fig, axes = plt.subplots(args, *subplots_kwargs)
142			# The array of axes must be 2D so that it can be indexed correctly within
143			# the plot_volume() function
144			axes = axes.T if many_images else axes.reshape(-1, 3)
145			iterable = enumerate(subject.get_images_dict(intensity_only=False).items())
146			axes_names = 'sagittal', 'coronal', 'axial'
147			for image_index, (name, image) in iterable:
148			image_axes = axes[image_index]
149			cmap = None
150			if cmap_dict is not None and name in cmap_dict:
151			cmap = cmap_dict[name]
152			last_row = image_index == len(axes) - 1
153			plot_volume(
154			image,
155			axes=image_axes,
156			show=False,
157			cmap=cmap,
158			xlabels=last_row,
159			**kwargs,
160			)
161			for axis, axis_name in zip(image_axes, axes_names):
162			axis.set_title(f'{name} ({axis_name})')
163			plt.tight_layout()
164			if output_path is not None:
165			fig.savefig(output_path)
166			if show:
167			plt.show()
168			plt.close(fig)
169
170
171			def color_labels(arrays, cmap_dict):
172			results = []
173			for array in arrays:
174			si, sj = array.shape
175			rgb = np.zeros((si, sj, 3), dtype=np.uint8)
176			for label, color in cmap_dict.items():
177			if isinstance(color, str):
178			mpl, _ = import_mpl_plt()
179			color = mpl.colors.to_rgb(color)
180			color = [255 * n for n in color]
181			rgb[array == label] = color
182			results.append(rgb)
183			return results
184
185
186			def make_gif(
187			tensor: torch.Tensor,
188			axis: int,
189			duration: float, # of full gif
190			output_path: TypePath,
191			loop: int = 0,
192			optimize: bool = True,
193			rescale: bool = True,
194			reverse: bool = False,
195			) -> None:
196			try:
197			from PIL import Image as ImagePIL
198			except ModuleNotFoundError as e:
199			message = (
200			'Please install Pillow to use Image.to_gif():'
201			' pip install Pillow'
202			)
203			raise RuntimeError(message) from e
204			tensor = RescaleIntensity((0, 255))(tensor) if rescale else tensor
205			single_channel = len(tensor) == 1
206
207			# Move channels dimension to the end and bring selected axis to 0
208			axes = np.roll(range(1, 4), -axis)
209			tensor = tensor.permute(*axes, 0)
210
211			if single_channel:
212			mode = 'P'
213			tensor = tensor[..., 0]
214			else:
215			mode = 'RGB'
216			array = tensor.byte().numpy()
217			n = 2 if axis == 1 else 1
218			images = [ImagePIL.fromarray(rotate(i, n=n)).convert(mode) for i in array]
219			num_images = len(images)
220			images = list(reversed(images)) if reverse else images
221			frame_duration_ms = duration / num_images * 1000
222			if frame_duration_ms < 10:
223			fps = round(1000 / frame_duration_ms)
224			frame_duration_ms = 10
225			new_duration = frame_duration_ms * num_images / 1000
226			message = (
227			'The computed frame rate from the given duration is too high'
228			f' ({fps} fps). The highest possible frame rate in the GIF'
229			' file format specification is 100 fps. The duration has been set'
230			f' to {new_duration:.1f} seconds, instead of {duration:.1f}'
231			)
232			warnings.warn(message)
233			images[0].save(
234			output_path,
235			save_all=True,
236			append_images=images[1:],
237			optimize=optimize,
238			duration=frame_duration_ms,
239			loop=loop,
240			)
241

fepegar / torchio

Pull Request — master (#682)

torchio.visualization.plot_volume() D

Complexity

Size

Duplication

Importance

How to fix Long Method Complexity Many Parameters

Long Method

Complexity

Many Parameters

Duplication Side-by-Side

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