kolena.workflow.visualization#
Legacy Warning
Content in this section reflects outdated practices or deprecated features. It's recommended to avoid using these in new developments.
While existing implementations using these features will continue to receive support, we strongly advise adopting the latest standards and tools for new projects to ensure optimal performance and compatibility. For more information and up-to-date practices, please refer to our newest documentation at docs.kolena.io.
Colormap(fade_low_activation=True)
#
Bases: ABC
A Colormap maps a pixel intensity to RGBA.
fade_low_activation: bool = fade_low_activation
instance-attribute
#
Fades out the regions with low activation by applying zero alpha value if set
True; otherwise, activation map is shown as is without any fading applied. By default, it's set to True.
This option makes the overlay visualization better by highlighting only the important regions.
red(intensity)
abstractmethod
#
Maps a grayscale pixel intensity to color red: [0, 255]
green(intensity)
abstractmethod
#
Maps a grayscale pixel intensity to color green: [0, 255]
blue(intensity)
abstractmethod
#
Maps a grayscale pixel intensity to color blue: [0, 255]
alpha(intensity)
#
Maps the grayscale pixel intensity to alpha: [0, 255]. If fade_low_activation
is False, then it returns the maximum alpha value.
ColormapJet(fade_low_activation=True)
#
Bases: Colormap
The MATLAB "Jet" color palette is a standard palette used for scientific and mathematical data.
It is defined as a linear ramp between the following colours: "#00007F", "blue", "#007FFF", "cyan", "#7FFF7F", "yellow", "#FF7F00", "red", "#7F0000"
colorize_activation_map(activation_map, colormap=ColormapJet())
#
Applies the specified colormap to the activation map.
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
activation_map
|
ndarray
|
A 2D numpy array, shaped (h, w) or (h, w, 1), of the activation map in |
required |
colormap
|
Optional[Colormap]
|
The colormap used to colorize the input activation map. Defaults to the MATLAB "Jet" colormap. |
ColormapJet()
|
Returns:
| Type | Description |
|---|---|
ndarray
|
The colorized activation map in RGBA format, in (h, w, 4) shape. |
encode_png(image, mode)
#
Encodes an image into an in-memory PNG file that is represented as binary data. It is used when you want to upload a 2 or 3-dimensional image in a NumPy array format to cloud.
It can be used in conjunction with
colorized_activation_map when uploading an
activation map.
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
image
|
ndarray
|
A 2D or 3D NumPy array, shaped either |
required |
mode
|
str
|
A PIL mode |
required |
Returns:
| Type | Description |
|---|---|
BytesIO
|
The in-memory PNG file represented as binary data. |