gx优化

chenyc

2025-05-29 92f69c57b920cf62ecc9f15f9ed196fa26dbf2ac

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/**
 * @license
 * Copyright 2020 Google LLC. All Rights Reserved.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * =============================================================================
 */
import { ENGINE } from '../../engine';
import { ResizeBilinear } from '../../kernel_names';
import { convertToTensor } from '../../tensor_util_env';
import * as util from '../../util';
import { op } from '../operation';
import { reshape } from '../reshape';
/**
 * Bilinear resize a single 3D image or a batch of 3D images to a new shape.
 *
 * @param images The images, of rank 4 or rank 3, of shape
 *     `[batch, height, width, inChannels]`. If rank 3, batch of 1 is assumed.
 * @param size The new shape `[newHeight, newWidth]` to resize the
 *     images to. Each channel is resized individually.
 * @param alignCorners Defaults to `false`. If true, rescale
 *     input by `(new_height - 1) / (height - 1)`, which exactly aligns the 4
 *     corners of images and resized images. If false, rescale by
 *     `new_height / height`. Treat similarly the width dimension.
 * @param halfPixelCenters Defaults to `false`. Whether to assume pixel centers
 *     are at 0.5, which would make the floating point coordinates of the top
 *     left pixel 0.5, 0.5.
 *
 * @doc {heading: 'Operations', subheading: 'Images', namespace: 'image'}
 */
function resizeBilinear_(images, size, alignCorners = false, halfPixelCenters = false) {
    const $images = convertToTensor(images, 'images', 'resizeBilinear');
    util.assert($images.rank === 3 || $images.rank === 4, () => `Error in resizeBilinear: x must be rank 3 or 4, but got ` +
        `rank ${$images.rank}.`);
    util.assert(size.length === 2, () => `Error in resizeBilinear: new shape must 2D, but got shape ` +
        `${size}.`);
    util.assert(halfPixelCenters === false || alignCorners === false, () => `Error in resizeBilinear: If halfPixelCenters is true, ` +
        `alignCorners must be false.`);
    let batchImages = $images;
    let reshapedTo4D = false;
    if ($images.rank === 3) {
        reshapedTo4D = true;
        batchImages = reshape($images, [1, $images.shape[0], $images.shape[1], $images.shape[2]]);
    }
    const [] = size;
    const inputs = { images: batchImages };
    const attrs = { alignCorners, halfPixelCenters, size };
    // tslint:disable-next-line: no-unnecessary-type-assertion
    const res = ENGINE.runKernel(ResizeBilinear, inputs, attrs);
    if (reshapedTo4D) {
        return reshape(res, [res.shape[1], res.shape[2], res.shape[3]]);
    }
    return res;
}
export const resizeBilinear = /* @__PURE__ */ op({ resizeBilinear_ });
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