Displaying local images inside a streamlit dataframe

Hi @Christian8, welcome to the forum!

If you check out the example from st.column_config.ImageColumn - Streamlit Docs, you’ll see that for base64 images, you need to include data:image/png;base64, before the actual base64 contents. If you modify your image_to_base64 function to do that, it should work fine

def image_to_base64(img):
    if img:
        with BytesIO() as buffer:
            img.save(buffer, "png")
            raw_base64 = base64.b64encode(buffer.getvalue()).decode()
            return f"data:image/png;base64,{raw_base64}"