116 lines
3.2 KiB
C
116 lines
3.2 KiB
C
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/*******************************************************************************
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* Copyright (c) 2015-2018 Skymind, Inc.
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*
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* This program and the accompanying materials are made available under the
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* terms of the Apache License, Version 2.0 which is available at
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* https://www.apache.org/licenses/LICENSE-2.0.
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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* SPDX-License-Identifier: Apache-2.0
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******************************************************************************/
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//
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// @author raver119@gmail.com
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//
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#include <op_boilerplate.h>
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#include <templatemath.h>
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#include <NDArray.h>
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namespace nd4j {
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namespace ops {
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namespace helpers {
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template <typename T>
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static FORCEINLINE void rgb_to_hsv(nd4j::LaunchContext * context, T r, T g, T b, T* h, T* s, T* v) {
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T vv = nd4j::math::nd4j_max<T>(r, nd4j::math::nd4j_max<T>(g, b));
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T range = vv - nd4j::math::nd4j_min<T>(r, nd4j::math::nd4j_min<T>(g, b));
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if (vv > 0) {
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*s = range / vv;
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} else {
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*s = 0;
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}
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T norm = 1.0f / (6.0f * range);
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T hh;
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if (r == vv) {
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hh = norm * (g - b);
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} else if (g == vv) {
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hh = norm * (b - r) + 2.0 / 6.0;
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} else {
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hh = norm * (r - g) + 4.0 / 6.0;
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}
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if (range <= (T) 0.0) {
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hh = 0;
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}
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if (hh < (T) 0.0) {
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hh = hh + 1.;
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}
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*v = vv;
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*h = hh;
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}
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template <typename T>
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static FORCEINLINE void hsv_to_rgb(nd4j::LaunchContext * context, T h, T s, T v, T* r, T* g, T* b) {
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T c = s * v;
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T m = v - c;
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T dh = h * 6;
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T rr, gg, bb;
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int h_category = static_cast<int>(dh);
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T fmodu = dh;
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while (fmodu <= (T) 0)
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fmodu += (T) 2.0f;
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while (fmodu >= (T) 2.0f)
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fmodu -= (T) 2.0f;
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T x = c * (1. - nd4j::math::nd4j_abs<T>(fmodu - 1.));
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switch (h_category) {
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case 0:
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rr = c;
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gg = x;
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bb = 0;
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break;
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case 1:
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rr = x;
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gg = c;
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bb = 0;
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break;
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case 2:
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rr = 0;
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gg = c;
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bb = x;
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break;
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case 3:
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rr = 0;
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gg = x;
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bb = c;
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break;
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case 4:
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rr = x;
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gg = 0;
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bb = c;
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break;
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case 5:
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rr = c;
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gg = 0;
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bb = x;
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break;
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default:
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rr = 0;
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gg = 0;
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bb = 0;
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}
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*r = rr + m;
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*g = gg + m;
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*b = bb + m;
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}
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void adjust_saturation(nd4j::LaunchContext * context, NDArray *input, NDArray *output, NDArray *delta, bool isNHWC);
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}
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}
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}
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