gx

chenyc

2025-06-12 7b72ac13a83764a662159d4a49b7fffb90476ecb

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/**
 * @license
 * Copyright 2022 CodeSmith LLC
 *
 * Use of this source code is governed by an MIT-style
 * license that can be found in the LICENSE file or at
 * https://opensource.org/licenses/MIT.
 * =============================================================================
 */
import { Layer } from '../../engine/topology';
import { serialization, mul, add, tidy } from '@tensorflow/tfjs-core';
import { getExactlyOneTensor } from '../../utils/types_utils';
import * as K from '../../backend/tfjs_backend';
/**
 * Preprocessing Rescaling Layer
 *
 * This rescales images by a scaling and offset factor
 */
class Rescaling extends Layer {
    constructor(args) {
        super(args);
        this.scale = args.scale;
        if (args.offset) {
            this.offset = args.offset;
        }
        else {
            this.offset = 0;
        }
    }
    getConfig() {
        const config = {
            'scale': this.scale,
            'offset': this.offset
        };
        const baseConfig = super.getConfig();
        Object.assign(config, baseConfig);
        return config;
    }
    call(inputs, kwargs) {
        return tidy(() => {
            inputs = getExactlyOneTensor(inputs);
            if (inputs.dtype !== 'float32') {
                inputs = K.cast(inputs, 'float32');
            }
            return add(mul(inputs, this.scale), this.offset);
        });
    }
}
/** @nocollapse */
Rescaling.className = 'Rescaling';
export { Rescaling };
serialization.registerClass(Rescaling);
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