Skip to content

enable assignment of "Download plot as a png" value to variable #2889

Open
@yasirroni

Description

@yasirroni

Bug (or Feature Request?):

I want to get the annotated image after I used drawrect. The only possible way, for now, is using the Download plot as a png button, save it on pc, read it. Is there a straightforward way to do that?

I mark it as a bug (or maybe it's the intended behavior by the developer) because fig.to_image(format="png", engine="kaleido") return the original image, not the annotated one.

Note: I'm using a jupyter notebook

import plotly.graph_objects as go
fig = go.Figure(data=go.Bar(y=[2, 3, 1]))
config = dict({    
    'modeBarButtonsToAdd':[
        'drawrect',
        'eraseshape',
    ],
    'modeBarButtonsToRemove':[
        'toggleSpikelines','hoverCompareCartesian'
    ]
})
fig.show(config=config)

original)

do some annotations...

annotated

then run:

import numpy as np
import cv2
import matplotlib.pyplot as plt
annotate_image = fig.to_image(format="png", engine="kaleido")
nparr = np.frombuffer(annotate_image, np.uint8)
img_numpy = cv2.imdecode(nparr, cv2.IMREAD_COLOR)
plt.imshow(img_numpy[...,::-1])

saved_image

The plt.imshow(img_numpy[...,::-1]) will show the original image, not the annotated image. How to use fig.to_image(format="png", engine="kaleido") to include the annotation of drawrect? Or any workaourd?

Metadata

Metadata

Assignees

No one assigned

    Labels

    P3backlogfeaturesomething new

    Type

    No type

    Projects

    No projects

    Milestone

    No milestone

    Relationships

    None yet

    Development

    No branches or pull requests

    Issue actions