| <!DOCTYPE html> |
| <html lang="en"> |
| <head> |
| <meta charset="UTF-8" /> |
| <meta name="viewport" content="width=device-width, initial-scale=1.0" /> |
| <title>Camera Interaction App</title> |
| <style> |
| body { |
| font-family: sans-serif; |
| display: flex; |
| flex-direction: column; |
| align-items: center; |
| gap: 20px; |
| padding: 20px; |
| background-color: #f0f0f0; |
| } |
| .controls, |
| .io-areas { |
| display: flex; |
| gap: 10px; |
| align-items: center; |
| background-color: #fff; |
| padding: 15px; |
| border-radius: 8px; |
| box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1); |
| } |
| .io-areas { |
| flex-direction: column; |
| align-items: stretch; |
| } |
| textarea { |
| width: 300px; |
| height: 80px; |
| padding: 8px; |
| border: 1px solid #ccc; |
| border-radius: 4px; |
| font-size: 14px; |
| } |
| #videoFeed { |
| display: block; |
| width: 100%; |
| height: 100%; |
| border-radius: 6px; |
| object-fit: cover; |
| } |
| #videoContainer { |
| position: relative; |
| width: 480px; |
| height: 360px; |
| border: 2px solid #333; |
| background-color: #000; |
| border-radius: 8px; |
| margin: 0 auto; |
| } |
| #loadingOverlay { |
| position: absolute; |
| top: 0; |
| left: 0; |
| width: 100%; |
| height: 100%; |
| display: none; |
| justify-content: center; |
| align-items: center; |
| background-color: rgba(0, 0, 0, 0.7); |
| z-index: 10; |
| border-radius: 6px; |
| color: #ffffff; |
| font-size: 1.5em; |
| font-weight: bold; |
| } |
| #startButton { |
| padding: 10px 20px; |
| font-size: 16px; |
| cursor: pointer; |
| border: none; |
| border-radius: 4px; |
| color: white; |
| } |
| #startButton.start { |
| background-color: #28a745; |
| } |
| #startButton.stop { |
| background-color: #dc3545; |
| } |
| label { |
| font-weight: bold; |
| } |
| select { |
| padding: 8px; |
| border-radius: 4px; |
| border: 1px solid #ccc; |
| } |
| .hidden { |
| display: none; |
| } |
| </style> |
| </head> |
| <body> |
| <h1>Camera Interaction App</h1> |
|
|
| <div id="videoContainer"> |
| <video id="videoFeed" autoplay playsinline></video> |
| <div id="loadingOverlay">Loading...</div> |
| </div> |
| <canvas id="canvas" class="hidden"></canvas> |
| |
|
|
| <div class="io-areas"> |
| <div> |
| <label for="instructionText">Instruction:</label><br /> |
| <textarea |
| id="instructionText" |
| style="height: 2em; width: 40em" |
| name="Instruction" |
| ></textarea> |
| </div> |
| <div> |
| <label for="responseText">Response:</label><br /> |
| <textarea |
| id="responseText" |
| style="height: 2em; width: 40em" |
| name="Response" |
| readonly |
| placeholder="Server response will appear here..." |
| ></textarea> |
| </div> |
| </div> |
|
|
| <div class="controls"> |
| <label for="intervalSelect">Interval between 2 requests:</label> |
| <select id="intervalSelect" name="Interval between 2 requests"> |
| <option value="0" selected>0ms</option> |
| <option value="100">100ms</option> |
| <option value="250">250ms</option> |
| <option value="500">500ms</option> |
| <option value="1000">1s</option> |
| <option value="2000">2s</option> |
| </select> |
| <button id="startButton" class="start">Start</button> |
| </div> |
|
|
| <script type="module"> |
| import { |
| AutoProcessor, |
| AutoModelForVision2Seq, |
| RawImage, |
| } from "https://cdn.jsdelivr.net/npm/@huggingface/transformers/dist/transformers.min.js"; |
| |
| const video = document.getElementById("videoFeed"); |
| const canvas = document.getElementById("canvas"); |
| const instructionText = document.getElementById("instructionText"); |
| const responseText = document.getElementById("responseText"); |
| const intervalSelect = document.getElementById("intervalSelect"); |
| const startButton = document.getElementById("startButton"); |
| const loadingOverlay = document.getElementById("loadingOverlay"); |
| |
| instructionText.value = "What do you see?"; |
| |
| let stream; |
| let isProcessing = false; |
| |
| let processor, model; |
| |
| async function initModel() { |
| const modelId = "HuggingFaceTB/SmolVLM-500M-Instruct"; |
| loadingOverlay.style.display = "flex"; |
| responseText.value = "Loading processor..."; |
| processor = await AutoProcessor.from_pretrained(modelId); |
| responseText.value = "Processor loaded. Loading model..."; |
| model = await AutoModelForVision2Seq.from_pretrained(modelId, { |
| dtype: { |
| embed_tokens: "fp16", |
| vision_encoder: "q4", |
| decoder_model_merged: "q4", |
| }, |
| device: "webgpu", |
| }); |
| responseText.value = "Model loaded. Initializing camera..."; |
| loadingOverlay.style.display = "none"; |
| } |
| |
| async function initCamera() { |
| try { |
| stream = await navigator.mediaDevices.getUserMedia({ |
| video: true, |
| audio: false, |
| }); |
| video.srcObject = stream; |
| responseText.value = "Camera access granted. Ready to start."; |
| } catch (err) { |
| console.error("Error accessing camera:", err); |
| responseText.value = `Error accessing camera: ${err.name} - ${err.message}. Please ensure permissions are granted and you are on HTTPS or localhost.`; |
| alert( |
| `Error accessing camera: ${err.name}. Make sure you've granted permission and are on HTTPS or localhost.` |
| ); |
| } |
| } |
| |
| function captureImage() { |
| if (!stream || !video.videoWidth) { |
| console.warn("Video stream not ready for capture."); |
| return null; |
| } |
| canvas.width = video.videoWidth; |
| canvas.height = video.videoHeight; |
| const context = canvas.getContext("2d", { willReadFrequently: true }); |
| context.drawImage(video, 0, 0, canvas.width, canvas.height); |
| const frame = context.getImageData(0, 0, canvas.width, canvas.height); |
| return new RawImage(frame.data, frame.width, frame.height, 4); |
| } |
| |
| async function runLocalVisionInference(imgElement, instruction) { |
| const messages = [ |
| { |
| role: "user", |
| content: [{ type: "image" }, { type: "text", text: instruction }], |
| }, |
| ]; |
| const text = processor.apply_chat_template(messages, { |
| add_generation_prompt: true, |
| }); |
| const inputs = await processor(text, [imgElement], { |
| do_image_splitting: false, |
| }); |
| const generatedIds = await model.generate({ |
| ...inputs, |
| max_new_tokens: 100, |
| }); |
| const output = processor.batch_decode( |
| generatedIds.slice(null, [inputs.input_ids.dims.at(-1), null]), |
| { skip_special_tokens: true } |
| ); |
| return output[0].trim(); |
| } |
| |
| async function sendData() { |
| if (!isProcessing) return; |
| const instruction = instructionText.value; |
| const rawImg = captureImage(); |
| if (!rawImg) { |
| responseText.value = "Capture failed"; |
| return; |
| } |
| try { |
| const reply = await runLocalVisionInference(rawImg, instruction); |
| responseText.value = reply; |
| } catch (e) { |
| console.error(e); |
| responseText.value = `Error: ${e.message}`; |
| } |
| } |
| |
| function sleep(ms) { |
| return new Promise((resolve) => setTimeout(resolve, ms)); |
| } |
| |
| async function processingLoop() { |
| const intervalMs = parseInt(intervalSelect.value, 10); |
| while (isProcessing) { |
| await sendData(); |
| if (!isProcessing) break; |
| await sleep(intervalMs); |
| } |
| } |
| |
| function handleStart() { |
| if (!stream) { |
| responseText.value = "Camera not available. Cannot start."; |
| alert("Camera not available. Please grant permission first."); |
| return; |
| } |
| isProcessing = true; |
| startButton.textContent = "Stop"; |
| startButton.classList.replace("start", "stop"); |
| |
| instructionText.disabled = true; |
| intervalSelect.disabled = true; |
| |
| responseText.value = "Processing started..."; |
| |
| processingLoop(); |
| } |
| |
| function handleStop() { |
| isProcessing = false; |
| startButton.textContent = "Start"; |
| startButton.classList.replace("stop", "start"); |
| |
| instructionText.disabled = false; |
| intervalSelect.disabled = false; |
| if (responseText.value.startsWith("Processing started...")) { |
| responseText.value = "Processing stopped."; |
| } |
| } |
| |
| startButton.addEventListener("click", () => { |
| if (isProcessing) { |
| handleStop(); |
| } else { |
| handleStart(); |
| } |
| }); |
| |
| window.addEventListener("DOMContentLoaded", async () => { |
| |
| if (!navigator.gpu) { |
| const videoElement = document.getElementById("videoFeed"); |
| const warningElement = document.createElement("p"); |
| warningElement.textContent = |
| "WebGPU is not available in this browser."; |
| warningElement.style.color = "red"; |
| warningElement.style.textAlign = "center"; |
| videoElement.parentNode.insertBefore( |
| warningElement, |
| videoElement.nextSibling |
| ); |
| } |
| |
| await initModel(); |
| await initCamera(); |
| }); |
| |
| window.addEventListener("beforeunload", () => { |
| if (stream) { |
| stream.getTracks().forEach((track) => track.stop()); |
| } |
| }); |
| </script> |
| </body> |
| </html> |
|
|
