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Merge pull request #828 from thewtex/dicom-image-package
Dicom image package
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| # itkwasm-compress-stringify | ||
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| [](https://badge.fury.io/py/itkwasm-compress-stringify) | ||
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| > API Demo: Zstandard compression and decompression and base64 encoding and decoding in WebAssembly. | ||
| This is a simple web browser app built with Python, HTML, and CSS that demonstrates the [itkwasm-compress-stringify](https://badge.fury.io/py/itkwasm-compress-stringify) Python package. | ||
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| ## Development | ||
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| The app uses the Python package published on pypi.org and the corresponding JavaScript package published npmjs.com. | ||
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| The web app can be developed locally with any http server that serves static files. For example: | ||
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| ```sh | ||
| python -m http.server | ||
| ``` |
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112
packages/compress-stringify/python-web-demo/compress_stringify_controller.py
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| # Generated file. To retain edits, remove this comment. | ||
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| from dataclasses import dataclass | ||
| from typing import Any, Dict | ||
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| import numpy as np | ||
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| import js | ||
| from pyodide.ffi.wrappers import add_event_listener | ||
| import pyodide | ||
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| from itkwasm_compress_stringify import compress_stringify_async | ||
| from compress_stringify_load_sample_inputs import load_sample_inputs | ||
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| @dataclass | ||
| class CompressStringifyModel: | ||
| inputs: Dict['str', Any] | ||
| options: Dict['str', Any] | ||
| outputs: Dict['str', Any] | ||
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| class CompressStringifyController: | ||
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| def __init__(self, load_sample_inputs): | ||
| self.model = CompressStringifyModel({}, {}, {}) | ||
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| self.load_sample_inputs = load_sample_inputs | ||
| if load_sample_inputs is not None: | ||
| load_sample_inputs_button = js.document.querySelector("#compress_stringify-inputs [name=load-sample-inputs]") | ||
| load_sample_inputs_button.setAttribute('style', 'display: block-inline;') | ||
| add_event_listener(load_sample_inputs_button, 'click', self.on_load_sample_inputs_click) | ||
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| # Inputs | ||
| input_element = js.document.querySelector('#compress_stringify-inputs input[name=input-file]') | ||
| add_event_listener(input_element, 'change', self.on_input_change) | ||
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| # Options | ||
| stringify_element = js.document.querySelector('#compress_stringify-inputs sl-checkbox[name=stringify]') | ||
| self.stringify_element = stringify_element | ||
| add_event_listener(stringify_element, 'sl-change', self.on_stringify_change) | ||
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| compression_level_element = js.document.querySelector('#compress_stringify-inputs sl-input[name=compression-level]') | ||
| self.compression_level_element = compression_level_element | ||
| add_event_listener(compression_level_element, 'sl-change', self.on_compression_level_change) | ||
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| data_url_prefix_element = js.document.querySelector('#compress_stringify-inputs sl-input[name=data-url-prefix]') | ||
| self.data_url_prefix_element = data_url_prefix_element | ||
| add_event_listener(data_url_prefix_element, 'sl-change', self.on_data_url_prefix_change) | ||
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| # Outputs | ||
| output_download_element = js.document.querySelector('#compress_stringify-outputs sl-button[name=output-download]') | ||
| self.output_download_element = output_download_element | ||
| add_event_listener(output_download_element, 'click', self.on_output_click) | ||
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| # Run | ||
| run_button = js.document.querySelector('#compress_stringify-inputs sl-button[name="run"]') | ||
| self.run_button = run_button | ||
| add_event_listener(run_button, 'click', self.on_run) | ||
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| def on_load_sample_inputs_click(self, event): | ||
| self.model = self.load_sample_inputs(self.model) | ||
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| async def on_input_change(self, event): | ||
| files = event.target.files | ||
| array_buffer = await files.item(0).arrayBuffer() | ||
| input_bytes = array_buffer.to_bytes() | ||
| self.model.inputs['input'] = input_bytes | ||
| input_element = js.document.querySelector("#compress_stringify-inputs sl-input[name=input]") | ||
| input_element.value = str(np.frombuffer(input_bytes[:50], dtype=np.uint8)) + ' ...' | ||
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| def on_stringify_change(self, event): | ||
| self.model.options['stringify'] = self.stringify_element.checked | ||
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| def on_compression_level_change(self, event): | ||
| self.model.options['compression_level'] = int(self.compression_level_element.value) | ||
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| def on_data_url_prefix_change(self, event): | ||
| self.model.options['data_url_prefix'] = self.data_url_prefix_element.value | ||
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| def on_output_click(self, event): | ||
| if 'output' not in self.model.outputs: | ||
| return | ||
| output = pyodide.ffi.to_js(self.model.outputs['output']) | ||
| js.globalThis.downloadFile(output, 'output.bin') | ||
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| async def on_run(self, event): | ||
| event.preventDefault() | ||
| event.stopPropagation() | ||
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| if 'input' not in self.model.inputs: | ||
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| js.globalThis.notify("Error while running pipeline", "Missing input 'input'", "danger", "exclamation-octagon") | ||
| return | ||
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| self.run_button.loading = True | ||
| try: | ||
| t0 = js.performance.now() | ||
| output = await compress_stringify_async(self.model.inputs['input'], **self.model.options) | ||
| t1 = js.performance.now() | ||
| js.globalThis.notify("compress_stringify successfully completed", f"in {t1 - t0} milliseconds.", "success", "rocket-fill") | ||
| self.model.outputs["output"] = output | ||
| self.output_download_element.variant = "success" | ||
| self.output_download_element.disabled = False | ||
| output_element = js.document.querySelector('#compress_stringify-outputs sl-textarea[name=output]') | ||
| output_element.value = str(np.frombuffer(output[:200], dtype=np.uint8)) + ' ...' | ||
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| except Exception as error: | ||
| js.globalThis.notify("Error while running pipeline", str(error), "danger", "exclamation-octagon") | ||
| raise error | ||
| finally: | ||
| self.run_button.loading = False | ||
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| compress_stringify_controller = CompressStringifyController(load_sample_inputs) |
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26
packages/compress-stringify/python-web-demo/compress_stringify_load_sample_inputs.py
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| import js | ||
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| # load_sample_inputs = None | ||
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| def load_sample_inputs(model): | ||
| sample_input = bytes([222, 173, 190, 239]) | ||
| model.inputs['input'] = sample_input | ||
| input_element = js.document.querySelector('#compress_stringify-inputs sl-input[name=input]') | ||
| input_element.value = str(sample_input) | ||
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| stringify = True | ||
| model.options['stringify'] = stringify | ||
| stringify_element = js.document.querySelector('#compress_stringify-inputs sl-checkbox[name=stringify]') | ||
| stringify_element.checked = stringify | ||
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| compression_level = 5 | ||
| model.options['compression_level'] = compression_level | ||
| compression_level_element = js.document.querySelector('#compress_stringify-inputs sl-input[name=compression-level]') | ||
| compression_level_element.value = compression_level | ||
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| data_url_prefix = 'data:application/iwi+cbor+zstd;base64,' | ||
| model.options['data_url_prefix'] = data_url_prefix | ||
| data_url_prefix_element = js.document.querySelector('#compress_stringify-inputs sl-input[name=data-url-prefix]') | ||
| data_url_prefix_element.value = data_url_prefix | ||
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| return model |
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