From a51bc4676de117046cc611998b080f58ddf7c1b4 Mon Sep 17 00:00:00 2001 From: kushalkolar Date: Fri, 15 Nov 2024 23:37:27 -0500 Subject: [PATCH] start video points example --- examples/image_widget/video_roi_points.py | 55 +++++++++++++++++++++++ fastplotlib/graphics/selectors/_linear.py | 8 ++++ 2 files changed, 63 insertions(+) create mode 100644 examples/image_widget/video_roi_points.py diff --git a/examples/image_widget/video_roi_points.py b/examples/image_widget/video_roi_points.py new file mode 100644 index 000000000..dc26436bb --- /dev/null +++ b/examples/image_widget/video_roi_points.py @@ -0,0 +1,55 @@ +""" +Image Widget Pixel Timeseries +============================= + +Use an ImageWidget to view a grayscale video and click on pixels to show their values +over time (timeseries) +""" + +# test_example = true +# sphinx_gallery_pygfx_docs = 'animate 6s 20fps' + +import numpy as np +import fastplotlib as fpl +import imageio.v3 as iio + + +# download and open video file +print("download and reading video file") +url = "https://caiman.flatironinstitute.org/~neuro/caiman_downloadables/demoMovieJ.tif" +url = "/home/kushal/caiman_data/example_movies/demoMovieJ.tif" +video = iio.imread(url) + +iw = fpl.ImageWidget( + video, + cmap="viridis", + figure_kwargs={"size": (700, 600)} +) +iw.show() + +fig = fpl.Figure(size=(700, 400)) + +# add an initial point +row_ix, col_ix = 29, 65 +timeseries = fig[0, 0].add_line(video[:, row_ix, col_ix], thickness=1.0) +point = iw.figure[0, 0].add_scatter(np.column_stack([col_ix, row_ix]), sizes=10, alpha=0.7, colors="magenta") + +time_selector = timeseries.add_linear_selector() + + +@time_selector.add_event_handler("selection") +def set_time_from_selector(ev): + iw.current_index = {"t": ev.get_selected_index()} + + +@iw.managed_graphics[0].add_event_handler("double_click") +def update_pixel(ev): + col, row = ev.pick_info["index"] + + point.data[0, :2] = [col, row] + timeseries.data[:, 1] = video[:, row, col] + fig[0, 0].auto_scale(maintain_aspect=False) + + +fig.show(maintain_aspect=False) +fpl.run() diff --git a/fastplotlib/graphics/selectors/_linear.py b/fastplotlib/graphics/selectors/_linear.py index dfe7aadab..85a7e4c1f 100644 --- a/fastplotlib/graphics/selectors/_linear.py +++ b/fastplotlib/graphics/selectors/_linear.py @@ -47,6 +47,14 @@ def limits(self, values: tuple[float, float]): ) # if values are close to zero things get weird so round them self.selection._limits = self._limits + @property + def end_points(self) -> tuple[float, float]: + pass + + @end_points.setter + def end_points(self, points: tuple[float, float]): + pass + # TODO: make `selection` arg in graphics data space not world space def __init__( self, pFad - Phonifier reborn

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