@tensorflow/tfjs-core
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Hardware-accelerated JavaScript library for machine intelligence
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JavaScript
/**
* @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 { RotateWithOffset } from '../../kernel_names';
import { convertToTensor } from '../../tensor_util_env';
import * as util from '../../util';
import { op } from '../operation';
/**
* Rotates the input image tensor counter-clockwise with an optional offset
* center of rotation. Currently available in the CPU, WebGL, and WASM backends.
*
* @param image 4d tensor of shape `[batch, imageHeight, imageWidth, depth]`.
* @param radians The amount of rotation.
* @param fillValue The value to fill in the empty space leftover
* after rotation. Can be either a single grayscale value (0-255), or an
* array of three numbers `[red, green, blue]` specifying the red, green,
* and blue channels. Defaults to `0` (black).
* @param center The center of rotation. Can be either a single value (0-1), or
* an array of two numbers `[centerX, centerY]`. Defaults to `0.5` (rotates
* the image around its center).
*
* @doc {heading: 'Operations', subheading: 'Images', namespace: 'image'}
*/
function rotateWithOffset_(image, radians, fillValue = 0, center = 0.5) {
const $image = convertToTensor(image, 'image', 'rotateWithOffset', 'float32');
util.assert($image.rank === 4, () => 'Error in rotateWithOffset: image must be rank 4,' +
`but got rank ${$image.rank}.`);
const inputs = { image: $image };
const attrs = { radians, fillValue, center };
const res = ENGINE.runKernel(RotateWithOffset, inputs, attrs);
return res;
}
export const rotateWithOffset = op({ rotateWithOffset_ });
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