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-/*
- * Project: SILX: Data analysis library
- * kernel for maximum and minimum calculation
- *
- *
- * Copyright (C) 2013-2017 European Synchrotron Radiation Facility
- * Grenoble, France
- *
- * Principal authors: J. Kieffer (kieffer@esrf.fr)
- *
- * Permission is hereby granted, free of charge, to any person
- * obtaining a copy of this software and associated documentation
- * files (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use,
- * copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following
- * conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
- * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
- * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
- * OTHER DEALINGS IN THE SOFTWARE.
- *
- *
- */
-
-#ifndef NB_COLOR
- #define NB_COLOR 1
-#endif
-
-
-/**
- * \brief Linear scale of signal in an image (maybe multi-color)
- *
- * :param image: contains the input image
- * :param output: contains the output image after scaling
- * :param max_min_input: 2-floats containing the maximum and the minimum value of image
- * :param minimum: float scalar with the minimum of the output
- * :param maximum: float scalar with the maximum of the output
- * :param width: integer, number of columns the matrices
- * :param height: integer, number of lines of the matrices
- *
- *
- */
-
-
-kernel void normalize_image(global float* image,
- global float* output,
- int width,
- int height,
- global float* max_min_input,
- float minimum,
- float maximum
- )
-{
- //Global memory guard for padding
- if((get_global_id(0) < width) && (get_global_id(1)<height))
- {
- int idx = NB_COLOR* (get_global_id(0) + width * get_global_id(1));
- float mini_in, maxi_in, scale;
- maxi_in = max_min_input[0];
- mini_in = max_min_input[1];
- if (maxi_in == mini_in)
- {
- scale = NAN;
- }
- else
- {
- scale = (maximum - minimum) / (maxi_in - mini_in);
- }
-
- for (int c=0; c<NB_COLOR; c++)
- {
- output[idx+c] = fma(scale, image[idx+c]-mini_in, minimum);
- } // end color loop
- }//end if in IMAGE
-}//end kernel