Update app.py
Browse files
app.py
CHANGED
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@@ -3,35 +3,33 @@ from pdf2image import convert_from_bytes
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from PIL import Image
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import io
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import zipfile
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def convert_pdf_to_images(pdf_byte_data, dpi_value):
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"""
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Convert a PDF file in bytes to a list of PIL images using pdf2image.
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This function requires pdf2image and poppler installed on the system.
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Args:
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pdf_byte_data (bytes): PDF file in memory
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dpi_value (int): DPI setting for the conversion
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Returns:
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list: A list of PIL Image objects
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"""
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images_list = convert_from_bytes(
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return images_list
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def create_zip_from_images(images_list):
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"""
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Create an in-memory ZIP file from a list of PIL images.
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Each image is saved as a PNG in the ZIP file.
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Args:
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images_list (list): A list of PIL Image objects
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Returns:
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BytesIO: A BytesIO object representing the in-memory ZIP file
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"""
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zip_buf = io.BytesIO()
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with zipfile.ZipFile(zip_buf,
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for idx, single_image in enumerate(images_list):
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img_buf = io.BytesIO()
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single_image.save(img_buf, format='PNG')
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@@ -41,29 +39,43 @@ def create_zip_from_images(images_list):
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return zip_buf
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# Streamlit App
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st.title("PDFを高画質PNG画像に変換
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st.write(
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"""
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このアプリケーションでは、アップロードしたPDF
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"""
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)
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uploaded_file = st.file_uploader("PDFファイルをアップロードしてください", type=["pdf"])
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if uploaded_file is not None:
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if st.button("変換開始"):
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try:
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with st.spinner("PDFを画像に変換中..."):
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#
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images_converted = convert_pdf_to_images(
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#
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zip_file_bytes = create_zip_from_images(images_converted)
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# Download button
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st.success("変換が完了しました!")
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st.download_button(
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label="ZIPファイルをダウンロード",
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@@ -72,10 +84,10 @@ if uploaded_file is not None:
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mime="application/zip"
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)
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#
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st.write("
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for
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st.image(
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except Exception as e:
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st.error(f"変換中にエラーが発生しました: {e}")
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from PIL import Image
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import io
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import zipfile
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import sys
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import os
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def convert_pdf_to_images(pdf_byte_data, dpi_value, poppler_path_value):
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"""
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Convert a PDF file in bytes to a list of PIL images using pdf2image.
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Args:
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pdf_byte_data (bytes): PDF file in memory
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dpi_value (int): DPI setting for the conversion
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poppler_path_value (str): poppler path (Windows user only)
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Returns:
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list: A list of PIL Image objects
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"""
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images_list = convert_from_bytes(
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pdf_byte_data,
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dpi=dpi_value,
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poppler_path=poppler_path_value if poppler_path_value else None
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)
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return images_list
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def create_zip_from_images(images_list):
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"""
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Create an in-memory ZIP file from a list of PIL images.
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Each image is saved as a PNG in the ZIP file.
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"""
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zip_buf = io.BytesIO()
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with zipfile.ZipFile(zip_buf, "w", zipfile.ZIP_DEFLATED) as zf:
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for idx, single_image in enumerate(images_list):
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img_buf = io.BytesIO()
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single_image.save(img_buf, format='PNG')
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return zip_buf
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# Streamlit App
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st.title("PDFを高画質PNG画像に変換")
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st.write(
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"""
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このアプリケーションでは、アップロードしたPDFファイルを高解像度(例:1000 dpi)のPNG画像に変換します。
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変換後、各ページの画像をダウンロード可能なZIPファイルとして提供します。
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"""
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)
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uploaded_file = st.file_uploader("PDFファイルをアップロードしてください", type=["pdf"])
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if uploaded_file is not None:
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# DPIの設定
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dpi = st.slider("解像度(dpi)を選択してください", min_value=100, max_value=3000, value=1000, step=100)
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# Windows向けのPopplerパス入力 (Mac/LinuxなどPOPPLERがPATHに通っている環境なら不要)
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poppler_path_input = None
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if sys.platform.startswith("win"):
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poppler_path_input = st.text_input(
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"Popplerのパスを入力してください(Windowsユーザーのみ)",
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value="" # 例: "C:\\poppler-xx\\bin"
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)
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if poppler_path_input and not os.path.exists(poppler_path_input):
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st.warning("指定されたPopplerのパスが存在しません。正しいパスを入力してください。")
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if st.button("変換開始"):
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try:
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with st.spinner("PDFを画像に変換中..."):
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# PDF→画像へ変換
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images_converted = convert_pdf_to_images(
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uploaded_file.read(),
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dpi_value=dpi,
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poppler_path_value=poppler_path_input
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)
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# ZIPファイル作成
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zip_file_bytes = create_zip_from_images(images_converted)
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st.success("変換が完了しました!")
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st.download_button(
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label="ZIPファイルをダウンロード",
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mime="application/zip"
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)
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# 各ページの画像を表示(オプション)
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st.write("変換された画像:")
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for i, image in enumerate(images_converted):
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st.image(image, caption=f"ページ {i+1}", use_column_width=True)
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except Exception as e:
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st.error(f"変換中にエラーが発生しました: {e}")
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