Trender — AI 트렌드 자동 수집

Token Classification • 1B • Updated • 239k • 1.45k

Published April 27, 2026

: drop in a PDF or DOCX, read the document back with every PII span highlighted in place.Document Privacy Explorer
: upload an image, get it back with redacted black bars over names, emails, and account numbers. The image is also editable on a canvas so you can make your own annotations before downloading.Image Anonymizer
: paste sensitive text, share a public URL that serves the redacted version, keep a private reveal link for yourself.SmartRedact Paste

All three are built on gradio.Server, which lets you pair custom HTML/JS frontends with Gradio's queueing, ZeroGPU allocation, and

gradio_client

SDK. In all these apps, gradio.Server plays the same backend role, and that consistency is exactly what makes it really powerful.

Privacy Filter is a 1.5B-parameter model with 50M active parameters, permissively licensed under Apache 2.0. PII categories are

private_person

private_address

private_email

private_phone

private_url

private_date

account_number

secret

. Context is 128,000 tokens. Achieves state-of-the-art performance on the PII-Masking-300k benchmark. Full numbers and methodology are in the official release blog.

Try it at ysharma/OPF-Document-PII-Explorer.

User problem. You want to read a PII-heavy document (a contract, a resume, an exported chat log) with every detected span highlighted by category, a filter in the sidebar, and a summary dashboard up top. The reading experience should feel like a normal document, not a form.

What Privacy Filter does here. The whole file goes through in a single 128k-context forward pass, so there's no chunking, no stitching, and span offsets line up directly with the rendered text. BIOES decoding keeps span boundaries clean through long ambiguous runs.

What gr.Server does here. You could wire this up in Blocks with

gr.HighlightedText

and a sidebar, and it would work. The reading experience we wanted (serif body, category filters that toggle CSS classes client-side instead of re-running the model, a summary dashboard that doesn't force a page re-render) was easier to hand-author than to compose.

gr.Server

lets us serve the reader view as a single HTML file and expose the model behind one queued endpoint:

import gradio as gr
from fastapi.responses import HTMLResponse
from gradio.data_classes import FileData

server = gr.Server()

@server.get("/", response_class=HTMLResponse)
async def homepage():
    return FRONTEND_HTML                           # reader view; see app.py

@server.api(name="analyze_document")
def analyze_document(file: FileData) -> dict:
    text = extract_text(file["path"])              # PyMuPDF / python-docx
    source_text, spans = run_privacy_filter(text)  # single 128k pass
    return {
        "text":  source_text,
        "spans": spans,                            # [{start, end, label}, ...]
        "stats": compute_stats(source_text, spans),
    }

Note the decorator:

@server.api(name="analyze_document")

, not a plain

@server.post

. That's the piece that plugs the handler into Gradio's queue, so concurrent uploads are serialized,

@spaces.GPU

composes correctly on ZeroGPU, and the same endpoint is reachable from both the browser and

gradio_client

with no duplicated code. The browser calls it with the Gradio JS client:

<script type="module">
import { Client, handle_file } from "https://cdn.jsdelivr.net/npm/@gradio/client/dist/index.min.js";
const client = await Client.connect(window.location.origin);

async function uploadFile(file) {
  const result = await client.predict("/analyze_document", { file: handle_file(file) });
  renderResults(result.data[0]);                   // { text, spans, stats }
}
</script>

Try it at ysharma/OPF-Image-Anonymizer.

User problem. You want to share an image or any screenshot (a Slack thread, a receipt, a Stripe dashboard) with black bars over the PII. You want to toggle bars on and off, drag them to reposition, or draw one by hand for anything the model missed, then export the result.

What Privacy Filter does here. Tesseract runs OCR and returns per-word bounding boxes. The backend reconstructs the full text with a char-offset to box map, then runs Privacy Filter once over the whole text. Detected character spans are looked up against the word map and joined into pixel rectangles per line.

What gr.Server does here.

gr.ImageEditor

supports layered annotation and is a reasonable starting point for image redaction. The workflow we wanted (per-bar category metadata, toggle all bars in a category at once, client-side PNG export at natural resolution with no server round-trip) was cleaner to build on a custom

<canvas>

frontend.

gr.Server

hands back pixel rectangles from one queued endpoint and lets the canvas own everything else:

@server.api(name="anonymize_screenshot")
def anonymize_screenshot(image: FileData) -> dict:
    img = Image.open(image["path"]).convert("RGB")
    full_text, char_to_box = ocr_image(img)        # per-word boxes + char map
    spans = run_privacy_filter(full_text)
    boxes = spans_to_pixel_boxes(spans, char_to_box)
    return {
        "image_data_url": pil_to_base64(img),
        "width":  img.width,
        "height": img.height,
        "boxes":  boxes,                           # [{x, y, w, h, label, text}, ...]
    }

The frontend invokes it with

client.predict("/anonymize_screenshot", { image: handle_file(file) })

, the same pattern as above. Toggles, drags, new-bar drawing, and PNG export all happen in the browser; edits never round-trip to the server.

Try it at ysharma/OPF-SmartRedact-Paste.

User problem. You want a pastebin that redacts before sharing. You paste a log line, an email, a support ticket. You get two URLs back. The public one serves the redacted version with

<PRIVATE_PERSON>

<PRIVATE_EMAIL>

<ACCOUNT_NUMBER>

placeholders, following the redaction convention from the official blog examples. The private one is gated by a token you keep and shows the original with spans highlighted.

What Privacy Filter does here. Swap each detected span with a

<CATEGORY>

placeholder on the stored paste. That's the entire redaction step. Multilingual text (Spanish, French, Chinese, Hindi, and others in the model-card examples) routes through the same call with no change.

What gr.Server does here. This app needs two distinct GET routes for the same paste ID, one public and one token-gated, and the URL shape matters because the reveal URL is the thing you keep.

gr.Server

works here because it's a FastAPI app underneath — which is also why

@server.api

and plain

@server.get

can sit side by side in the same process. Note: this can also be built with

gr.Blocks()

# Model call → queued endpoint. Hit from the browser via
# client.predict("/create_paste", { text, ttl }).
@server.api(name="create_paste")
def create_paste(text: str, ttl: str = "never") -> dict:
    source_text, spans = run_privacy_filter(text)
    redacted = redact(source_text, spans)          # <CATEGORY> placeholders
    pid, reveal_token = secrets.token_urlsafe(6), secrets.token_urlsafe(22)
    PASTES[pid] = Paste(pid, reveal_token, source_text, redacted, spans,
                        expires_at=_ttl(ttl))      # see app.py
    return {
        "view_path":   f"/view/{pid}",
        "reveal_path": f"/view/{pid}?token={reveal_token}",
    }

# View page → plain FastAPI GET. No model, no queue needed, and we
# actually want the bespoke URL shape `/view/{pid}?token=...` that a
# queued endpoint couldn't give us.
@server.get("/view/{pid}", response_class=HTMLResponse)
async def view_paste(pid: str, token: str | None = None):
    p = _store_get(pid)                            # see app.py for store
    if p is None:
        return HTMLResponse(_not_found(), status_code=404)
    revealed = bool(token) and secrets.compare_digest(token, p.reveal_token)
    return HTMLResponse(_render_view(p, revealed))

A daemon thread evicts expired pastes every 30 seconds. The whole service, including storage, is about 200 lines of application code because everything lives in one process.

gradio.Server

provides

The split across all three apps is the same — anything that touches the model goes through

@server.api

, everything else stays on plain FastAPI routes:

App	Queued compute ( @server.api )	Plain FastAPI routes
Document Privacy Explorer	analyze_document — extract, detect, stats	GET / serves the custom reader view
Image Anonymizer	anonymize_screenshot — OCR, detect, spans → pixel boxes	GET / + GET /examples/* serve the canvas UI and preloaded examples
SmartRedact Paste	create_paste — detect, redact, mint IDs	GET / compose page, GET /view/{pid}?token=... public + token-gated views, GET /api/paste/{pid} JSON lookup

App

Queued compute (

@server.api

)

Plain FastAPI routes

Document Privacy Explorer

analyze_document

— extract, detect, stats

GET /

serves the custom reader view

Image Anonymizer

anonymize_screenshot

— OCR, detect, spans → pixel boxes

GET /

GET /examples/*

serve the canvas UI and preloaded examples

SmartRedact Paste

create_paste

— detect, redact, mint IDs

GET /

compose page,

GET /view/{pid}?token=...

public + token-gated views,

GET /api/paste/{pid}

JSON lookup

@server.api

gives you Gradio's queue (serialized requests, correct

@spaces.GPU

composition on ZeroGPU, progress events) and it's what the browser hits through @gradio/client. The same endpoint is also what

gradio_client

users hit from Python — one function, two SDKs, no duplicated code. Plain

@server.get

@server.post

are reserved for the static surfaces: HTML pages, file lookups, cheap dict reads. That's the rule of thumb from the

Drop in a resume, a screenshot of a Slack thread, a log line with a token in it. The fun part is seeing what Privacy Filter catches (and occasionally misses) on text you actually care about.

OpenAI's release post: Introducing OpenAI Privacy Filter
Model card: openai/privacy-filter on Hugging Face
Redaction examples and taxonomy on Model card

Token Classification • 1B • Updated • 239k • 1.45k

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