Add support for visualizing self-attention heatmaps + sequence classi…

…fier outputs w/ attentions (#1117)

* Add support for nearest neighbour interpolation

* Support bigint inputs for `min` and `max` helper functions

* Add min/max/argmin/argmax tensor ops

* Allow sequence classifier outputs with attentions

* Align depth estimation pipeline w/ python version

* Update `min` and `max` types

* Fix qwen2vl processor

* Update depth estimation pipeline unit tests

* Remove old comments

* Update types

* Fix type issues

src/models.js

@@ -4463,6 +4463,7 @@ export class Qwen2VLForConditionalGeneration extends Qwen2VLPreTrainedModel {
                 const image_nums = vision_tokens.filter(x => x == image_token_id).length;
                 const video_nums = vision_tokens.filter(x => x == video_token_id).length;
 
+                /** @type {number[][]} */
                 let llm_pos_ids_list = [];
                 let st = 0;
                 let remain_images = image_nums;
@@ -4532,6 +4533,7 @@ export class Qwen2VLForConditionalGeneration extends Qwen2VLPreTrainedModel {
                 // NOTE: Each item in llm_pos_ids_list is an array of shape (3, text_len),
                 // meaning to perform concatenation along dim=1, we can do the following:
                 const num_items = llm_pos_ids_list.reduce((acc, x) => acc + x.length, 0);
+                /** @type {number[]} */
                 const llm_positions = new Array(num_items);
                 let index = 0;
                 for (let x = 0; x < 3; ++x) {
@@ -4572,9 +4574,10 @@ export class Qwen2VLForConditionalGeneration extends Qwen2VLPreTrainedModel {
                     { length: 3 * data.length },
                     (_, i) => data[i % data.length]
                 );
+                /** @type {bigint[]} */
                 const mrope_position_deltas = Array.from(
                     { length: dims[0] },
-                    (_, i) => max(data.subarray(dims[1] * i, dims[1] * (i + 1)))[0] + 1 + dims[1]
+                    (_, i) => max(data.subarray(dims[1] * i, dims[1] * (i + 1)))[0] + 1n + BigInt(dims[1])
                 );
 
                 return [
@@ -5145,7 +5148,7 @@ export class DPTModel extends DPTPreTrainedModel { }
  * 
  * **Example:** Depth estimation w/ `Xenova/dpt-hybrid-midas`.
  * ```javascript
- * import { DPTForDepthEstimation, AutoProcessor, RawImage, interpolate, max } from '@huggingface/transformers';
+ * import { DPTForDepthEstimation, AutoProcessor, RawImage, interpolate_4d } from '@huggingface/transformers';
  * 
  * // Load model and processor
  * const model_id = 'Xenova/dpt-hybrid-midas';
@@ -5154,7 +5157,7 @@ export class DPTModel extends DPTPreTrainedModel { }
  * 
  * // Load image from URL
  * const url = 'http://images.cocodataset.org/val2017/000000039769.jpg';
- * const image = await RawImage.fromURL(url);
+ * const image = await RawImage.read(url);
  * 
  * // Prepare image for the model
  * const inputs = await processor(image);
@@ -5163,10 +5166,15 @@ export class DPTModel extends DPTPreTrainedModel { }
  * const { predicted_depth } = await model(inputs);
  * 
  * // Interpolate to original size
- * const prediction = interpolate(predicted_depth, image.size.reverse(), 'bilinear', false);
+ * const prediction = (await interpolate_4d(predicted_depth.unsqueeze(1), {
+     * size: image.size.reverse(),
+     * mode: 'bilinear',
+ * })).squeeze(1);
  * 
  * // Visualize the prediction
- * const formatted = prediction.mul_(255 / max(prediction.data)[0]).to('uint8');
+ * const min = prediction.min().item();
+ * const max = prediction.max().item();
+ * const formatted = prediction.sub_(min).div_(max - min).mul_(255).to('uint8');
  * const depth = RawImage.fromTensor(formatted);
  * // RawImage {
  * //   data: Uint8Array(307200) [ 85, 85, 84, ... ],
@@ -5216,11 +5224,7 @@ export class GLPNPreTrainedModel extends PreTrainedModel { }
 export class GLPNModel extends GLPNPreTrainedModel { }
 
 /**
- * GLPN Model transformer with a lightweight depth estimation head on top e.g. for KITTI, NYUv2.
- * 
- * **Example:** Depth estimation w/ `Xenova/glpn-kitti`.
- * ```javascript
- * import { GLPNForDepthEstimation, AutoProcessor, RawImage, interpolate, max } from '@huggingface/transformers';
+ * import { GLPNForDepthEstimation, AutoProcessor, RawImage, interpolate_4d } from '@huggingface/transformers';
  * 
  * // Load model and processor
  * const model_id = 'Xenova/glpn-kitti';
@@ -5229,7 +5233,7 @@ export class GLPNModel extends GLPNPreTrainedModel { }
  * 
  * // Load image from URL
  * const url = 'http://images.cocodataset.org/val2017/000000039769.jpg';
- * const image = await RawImage.fromURL(url);
+ * const image = await RawImage.read(url);
  * 
  * // Prepare image for the model
  * const inputs = await processor(image);
@@ -5238,13 +5242,18 @@ export class GLPNModel extends GLPNPreTrainedModel { }
  * const { predicted_depth } = await model(inputs);
  * 
  * // Interpolate to original size
- * const prediction = interpolate(predicted_depth, image.size.reverse(), 'bilinear', false);
+ * const prediction = (await interpolate_4d(predicted_depth.unsqueeze(1), {
+     * size: image.size.reverse(),
+     * mode: 'bilinear',
+ * })).squeeze(1);
  * 
  * // Visualize the prediction
- * const formatted = prediction.mul_(255 / max(prediction.data)[0]).to('uint8');
+ * const min = prediction.min().item();
+ * const max = prediction.max().item();
+ * const formatted = prediction.sub_(min).div_(max - min).mul_(255).to('uint8');
  * const depth = RawImage.fromTensor(formatted);
  * // RawImage {
- * //   data: Uint8Array(307200) [ 207, 169, 154, ... ],
+ * //   data: Uint8Array(307200) [ 85, 85, 84, ... ],
  * //   width: 640,
  * //   height: 480,
  * //   channels: 1
@@ -7747,10 +7756,17 @@ export class SequenceClassifierOutput extends ModelOutput {
     /**
      * @param {Object} output The output of the model.
      * @param {Tensor} output.logits classification (or regression if config.num_labels==1) scores (before SoftMax).
+     * @param {Record<string, Tensor>} [output.attentions] Object of `torch.FloatTensor` (one for each layer) of shape `(batch_size, num_heads, sequence_length, sequence_length)`.
+     * Attentions weights after the attention softmax, used to compute the weighted average in the self-attention heads.
      */
-    constructor({ logits }) {
+    constructor({ logits, ...attentions }) {
         super();
         this.logits = logits;
+        const attentions_list = Object.values(attentions);
+        if (attentions_list.length > 0) {
+            // Only set attentions if they are not empty
+            this.attentions = attentions_list;
+        }
     }
 }
 

src/models/idefics3/image_processing_idefics3.js

@@ -146,6 +146,8 @@ export class Idefics3ImageProcessor extends ImageProcessor {
 
                     const start_offset = i * pixel_attention_mask_stride + num_patches * h * w;
                     const end_offset = (i + 1) * pixel_attention_mask_stride;
+
+                    // @ts-expect-error
                     pixel_attention_mask_data.fill(false, start_offset, end_offset);
                 }
             }

src/models/pyannote/feature_extraction_pyannote.js

@@ -52,6 +52,7 @@ export class PyAnnoteFeatureExtractor extends FeatureExtractor {
 
             let current_speaker = -1;
             for (let i = 0; i < scores.length; ++i) {
+                /** @type {number[]} */
                 const probabilities = softmax(scores[i]);
                 const [score, id] = max(probabilities);
                 const [start, end] = [i, i + 1];

src/models/seamless_m4t/feature_extraction_seamless_m4t.js

@@ -133,8 +133,8 @@ export class SeamlessM4TFeatureExtractor extends FeatureExtractor {
                         'int64',
                         new BigInt64Array(numPaddedFrames),
                         [1, numPaddedFrames],
-                    )
-                    padded_attention_mask.data.fill(1n, 0, num_frames);
+                    );
+                    /** @type {BigInt64Array} */ (padded_attention_mask.data).fill(1n, 0, num_frames);
                 }
             }
         }

src/models/whisper/feature_extraction_whisper.js

@@ -44,7 +44,7 @@ export class WhisperFeatureExtractor extends FeatureExtractor {
         )
 
         const data = features.data;
-        const maxValue = max(data)[0];
+        const maxValue = max(/** @type {Float32Array} */(data))[0];
 
         for (let i = 0; i < data.length; ++i) {
             data[i] = (Math.max(data[i], maxValue - 8.0) + 4.0) / 4.0;

src/ops/registry.js

@@ -36,6 +36,16 @@ export class TensorOpRegistry {
         // executionProviders: ['webgpu'],
     };
 
+    static get nearest_interpolate_4d() {
+        if (!this._nearest_interpolate_4d) {
+            this._nearest_interpolate_4d = wrap(
+                [8, 10, 18, 0, 58, 129, 1, 10, 41, 10, 1, 120, 10, 0, 10, 0, 10, 1, 115, 18, 1, 121, 34, 6, 82, 101, 115, 105, 122, 101, 42, 18, 10, 4, 109, 111, 100, 101, 34, 7, 110, 101, 97, 114, 101, 115, 116, 160, 1, 3, 18, 1, 114, 90, 31, 10, 1, 120, 18, 26, 10, 24, 8, 1, 18, 20, 10, 3, 18, 1, 98, 10, 3, 18, 1, 99, 10, 3, 18, 1, 104, 10, 3, 18, 1, 119, 90, 15, 10, 1, 115, 18, 10, 10, 8, 8, 7, 18, 4, 10, 2, 8, 4, 98, 31, 10, 1, 121, 18, 26, 10, 24, 8, 1, 18, 20, 10, 3, 18, 1, 98, 10, 3, 18, 1, 99, 10, 3, 18, 1, 104, 10, 3, 18, 1, 119, 66, 2, 16, 21],
+                this.session_options,
+                'y',
+            );
+        }
+        return this._nearest_interpolate_4d;
+    }
     static get bilinear_interpolate_4d() {
         if (!this._bilinear_interpolate_4d) {
             this._bilinear_interpolate_4d = wrap(

src/pipelines.js

@@ -69,7 +69,7 @@ import {
 import {
     Tensor,
     mean_pooling,
-    interpolate,
+    interpolate_4d,
     quantize_embeddings,
     topk,
 } from './utils/tensor.js';
@@ -2901,11 +2901,23 @@ export class DepthEstimationPipeline extends (/** @type {new (options: ImagePipe
 
         const toReturn = [];
         for (let i = 0; i < preparedImages.length; ++i) {
-            const prediction = interpolate(predicted_depth[i], preparedImages[i].size.reverse(), 'bilinear', false);
-            const formatted = prediction.mul_(255 / max(prediction.data)[0]).to('uint8');
+            const batch = predicted_depth[i];
+            const [height, width] = batch.dims.slice(-2);
+            const [new_width, new_height] = preparedImages[i].size;
+
+            // Interpolate to original size
+            const prediction = (await interpolate_4d(batch.view(1, 1, height, width), {
+                size: [new_height, new_width],
+                mode: 'bilinear',
+            })).view(new_height, new_width);
+
+            const minval = /** @type {number} */(prediction.min().item());
+            const maxval = /** @type {number} */(prediction.max().item());
+            const formatted = prediction.sub(minval).div_(maxval - minval).mul_(255).to('uint8').unsqueeze(0);
+            const depth = RawImage.fromTensor(formatted);
             toReturn.push({
-                predicted_depth: predicted_depth[i],
-                depth: RawImage.fromTensor(formatted),
+                predicted_depth: prediction,
+                depth,
             });
         }
 

src/tokenizers.js

@@ -533,19 +533,18 @@ class Unigram extends TokenizerModel {
      * Create a new Unigram tokenizer model.
      * @param {Object} config The configuration object for the Unigram model.
      * @param {number} config.unk_id The ID of the unknown token
-     * @param {any[][]} config.vocab A 2D array representing a mapping of tokens to scores.
+     * @param {[string, number][]} config.vocab A 2D array representing a mapping of tokens to scores.
      * @param {Object} moreConfig Additional configuration object for the Unigram model.
      */
     constructor(config, moreConfig) {
         super(config);
 
         const vocabSize = config.vocab.length;
         this.vocab = new Array(vocabSize);
+        /** @type {number[]} */
         this.scores = new Array(vocabSize);
         for (let i = 0; i < vocabSize; ++i) {
-            const piece = config.vocab[i];
-            this.vocab[i] = piece[0];
-            this.scores[i] = piece[1];
+            [this.vocab[i], this.scores[i]] = config.vocab[i];
         }
 
         this.unk_token_id = config.unk_id;

src/utils/maths.js

@@ -225,8 +225,9 @@ export function magnitude(arr) {
 
 /**
  * Returns the value and index of the minimum element in an array.
- * @param {number[]|TypedArray} arr array of numbers.
- * @returns {[number, number]} the value and index of the minimum element, of the form: [valueOfMin, indexOfMin]
+ * @template {number[]|bigint[]|AnyTypedArray} T
+ * @param {T} arr array of numbers.
+ * @returns {T extends bigint[]|BigTypedArray ? [bigint, number] : [number, number]} the value and index of the minimum element, of the form: [valueOfMin, indexOfMin]
  * @throws {Error} If array is empty.
  */
 export function min(arr) {
@@ -239,14 +240,15 @@ export function min(arr) {
             indexOfMin = i;
         }
     }
-    return [min, indexOfMin];
+    return /** @type {T extends bigint[]|BigTypedArray ? [bigint, number] : [number, number]} */([min, indexOfMin]);
 }
 
 
 /**
  * Returns the value and index of the maximum element in an array.
- * @param {number[]|AnyTypedArray} arr array of numbers.
- * @returns {[number, number]} the value and index of the maximum element, of the form: [valueOfMax, indexOfMax]
+ * @template {number[]|bigint[]|AnyTypedArray} T
+ * @param {T} arr array of numbers.
+ * @returns {T extends bigint[]|BigTypedArray ? [bigint, number] : [number, number]} the value and index of the maximum element, of the form: [valueOfMax, indexOfMax]
  * @throws {Error} If array is empty.
  */
 export function max(arr) {
@@ -259,7 +261,7 @@ export function max(arr) {
             indexOfMax = i;
         }
     }
-    return [Number(max), indexOfMax];
+    return /** @type {T extends bigint[]|BigTypedArray ? [bigint, number] : [number, number]} */([max, indexOfMax]);
 }
 
 function isPowerOfTwo(number) {

src/utils/tensor.js

@@ -9,6 +9,8 @@
 
 import {
     interpolate_data,
+    max,
+    min,
     permute_data
 } from './maths.js';
 
@@ -464,8 +466,6 @@ export class Tensor {
         return this.permute(...dims);
     }
 
-    // TODO add .max() and .min() methods
-
     /**
      * Returns the sum of each row of the input tensor in the given dimension dim.
      *
@@ -759,6 +759,36 @@ export class Tensor {
         return mean(this, dim, keepdim);
     }
 
+    min(dim = null, keepdim = false) {
+        if (dim !== null) {
+            throw new Error("`dim !== null` not yet implemented.");
+        }
+        const value = min(this.data)[0];
+        return new Tensor(this.type, [value], []);
+    }
+    max(dim = null, keepdim = false) {
+        if (dim !== null) {
+            throw new Error("`dim !== null` not yet implemented.");
+        }
+        const value = max(this.data)[0];
+        return new Tensor(this.type, [value], []);
+    }
+
+    argmin(dim = null, keepdim = false) {
+        if (dim !== null) {
+            throw new Error("`dim !== null` not yet implemented.");
+        }
+        const index = min(this.data)[1];
+        return new Tensor('int64', [BigInt(index)], []);
+    }
+    argmax(dim = null, keepdim = false) {
+        if (dim !== null) {
+            throw new Error("`dim !== null` not yet implemented.");
+        }
+        const index = max(this.data)[1];
+        return new Tensor('int64', [BigInt(index)], []);
+    }
+
     /**
      * Performs Tensor dtype conversion.
      * @param {DataType} type The desired data type.
@@ -892,7 +922,7 @@ export function interpolate(input, [out_height, out_width], mode = 'bilinear', a
  * @param {Tensor} input the input tensor
  * @param {Object} options the options for the interpolation
  * @param {[number, number]|[number, number, number]|[number, number, number, number]} [options.size=null] output spatial size.
- * @param {"bilinear"|"bicubic"} [options.mode='bilinear'] algorithm used for upsampling
+ * @param {"nearest"|"bilinear"|"bicubic"} [options.mode='bilinear'] algorithm used for upsampling
  * @returns {Promise<Tensor>} The interpolated tensor.
  */
 export async function interpolate_4d(input, {
@@ -922,7 +952,9 @@ export async function interpolate_4d(input, {
     }
 
     let op;
-    if (mode === 'bilinear') {
+    if (mode === 'nearest') {
+        op = await TensorOpRegistry.nearest_interpolate_4d;
+    } else if (mode === 'bilinear') {
         op = await TensorOpRegistry.bilinear_interpolate_4d;
     } else if (mode === 'bicubic') {
         op = await TensorOpRegistry.bicubic_interpolate_4d;
@@ -963,13 +995,13 @@ export async function rfft(x, a) {
  * Returns the k largest elements of the given input tensor.
  * Inspired by https://pytorch.org/docs/stable/generated/torch.topk.html
  * @param {Tensor} x the input tensor
- * @param {number} k the k in "top-k"
+ * @param {number} [k] the k in "top-k"
  * @returns {Promise<[Tensor, Tensor]>} the output tuple of (Tensor, LongTensor) of top-k elements and their indices.
  */
 export async function topk(x, k) {
     const op = await TensorOpRegistry.top_k;
 
-    if (k === null) {
+    if (k == null) {
         k = x.dims.at(-1);
     } else {
         k = Math.min(k, x.dims.at(-1));
@@ -998,10 +1030,10 @@ const arrayToIndexTensor = (array) => new Tensor('int64', array, [array.length])
 export async function slice(data, starts, ends, axes, steps) {
     const op = await TensorOpRegistry.slice;
     return await op({
-        x: data, 
-        s: arrayToIndexTensor(starts), 
-        e: arrayToIndexTensor(ends), 
-        a: arrayToIndexTensor(axes), 
+        x: data,
+        s: arrayToIndexTensor(starts),
+        e: arrayToIndexTensor(ends),
+        a: arrayToIndexTensor(axes),
         t: arrayToIndexTensor(steps ?? new Array(axes.length).fill(1)),
     });
 }