| 1 | /**
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| 2 | * @license
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| 3 | * Copyright 2020 Google LLC. All Rights Reserved.
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| 4 | * Licensed under the Apache License, Version 2.0 (the "License");
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| 5 | * you may not use this file except in compliance with the License.
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| 6 | * You may obtain a copy of the License at
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| 7 | *
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| 8 | * http://www.apache.org/licenses/LICENSE-2.0
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| 9 | *
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| 10 | * Unless required by applicable law or agreed to in writing, software
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| 11 | * distributed under the License is distributed on an "AS IS" BASIS,
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| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 13 | * See the License for the specific language governing permissions and
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| 14 | * limitations under the License.
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| 15 | * =============================================================================
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| 16 | */
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| 17 | import { ENGINE } from '../../engine';
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| 18 | import { RotateWithOffset } from '../../kernel_names';
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| 19 | import { convertToTensor } from '../../tensor_util_env';
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| 20 | import * as util from '../../util';
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| 21 | import { op } from '../operation';
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| 22 | /**
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| 23 | * Rotates the input image tensor counter-clockwise with an optional offset
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| 24 | * center of rotation. Currently available in the CPU, WebGL, and WASM backends.
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| 25 | *
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| 26 | * @param image 4d tensor of shape `[batch, imageHeight, imageWidth, depth]`.
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| 27 | * @param radians The amount of rotation.
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| 28 | * @param fillValue The value to fill in the empty space leftover
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| 29 | * after rotation. Can be either a single grayscale value (0-255), or an
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| 30 | * array of three numbers `[red, green, blue]` specifying the red, green,
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| 31 | * and blue channels. Defaults to `0` (black).
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| 32 | * @param center The center of rotation. Can be either a single value (0-1), or
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| 33 | * an array of two numbers `[centerX, centerY]`. Defaults to `0.5` (rotates
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| 34 | * the image around its center).
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| 35 | *
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| 36 | * @doc {heading: 'Operations', subheading: 'Images', namespace: 'image'}
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| 37 | */
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| 38 | function rotateWithOffset_(image, radians, fillValue = 0, center = 0.5) {
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| 39 | const $image = convertToTensor(image, 'image', 'rotateWithOffset', 'float32');
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| 40 | util.assert($image.rank === 4, () => 'Error in rotateWithOffset: image must be rank 4,' +
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| 41 | `but got rank ${$image.rank}.`);
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| 42 | const inputs = { image: $image };
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| 43 | const attrs = { radians, fillValue, center };
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| 44 | const res = ENGINE.runKernel(RotateWithOffset, inputs, attrs);
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| 45 | return res;
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| 46 | }
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| 47 | export const rotateWithOffset = op({ rotateWithOffset_ });
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| 48 | //# 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