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Diffstat (limited to 'src/core/CL/cl_kernels/sobel_filter.cl')
-rw-r--r-- | src/core/CL/cl_kernels/sobel_filter.cl | 541 |
1 files changed, 541 insertions, 0 deletions
diff --git a/src/core/CL/cl_kernels/sobel_filter.cl b/src/core/CL/cl_kernels/sobel_filter.cl new file mode 100644 index 0000000000..4eb0eef770 --- /dev/null +++ b/src/core/CL/cl_kernels/sobel_filter.cl @@ -0,0 +1,541 @@ +/* + * Copyright (c) 2016, 2017 ARM Limited. + * + * SPDX-License-Identifier: MIT + * + * 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. + */ +#include "helpers.h" + +/***********************************************/ +/* Begin implementation of Sobel3x3 filter */ +/***********************************************/ + +/** This OpenCL kernel that computes a Sobel3x3 filter. + * + * @attention To enable computation of the X gradient -DGRAD_X must be passed at compile time, while computation of the Y gradient + * is performed when -DGRAD_Y is used. You can use both when computation of both gradients is required. + * + * @param[in] src_ptr Pointer to the source image. Supported data types: U8 + * @param[in] src_stride_x Stride of the source image in X dimension (in bytes) + * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] src_stride_y Stride of the source image in Y dimension (in bytes) + * @param[in] src_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source image + * @param[out] dst_gx_ptr Pointer to the destination image. Supported data types: S16 + * @param[in] dst_gx_stride_x Stride of the destination image in X dimension (in bytes) + * @param[in] dst_gx_step_x dst_gx_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] dst_gx_stride_y Stride of the destination image in Y dimension (in bytes) + * @param[in] dst_gx_step_y dst_gx_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] dst_gx_offset_first_element_in_bytes The offset of the first element in the destination image + * @param[out] dst_gy_ptr Pointer to the destination image. Supported data types: S16 + * @param[in] dst_gy_stride_x Stride of the destination image in X dimension (in bytes) + * @param[in] dst_gy_step_x dst_gy_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] dst_gy_stride_y Stride of the destination image in Y dimension (in bytes) + * @param[in] dst_gy_step_y dst_gy_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] dst_gy_offset_first_element_in_bytes The offset of the first element in the destination image + */ +__kernel void sobel3x3( + IMAGE_DECLARATION(src) +#ifdef GRAD_X + , + IMAGE_DECLARATION(dst_gx) +#endif +#ifdef GRAD_Y + , + IMAGE_DECLARATION(dst_gy) +#endif +) +{ + Image src = CONVERT_TO_IMAGE_STRUCT(src); +#ifdef GRAD_X + Image dst_gx = CONVERT_TO_IMAGE_STRUCT(dst_gx); +#endif +#ifdef GRAD_Y + Image dst_gy = CONVERT_TO_IMAGE_STRUCT(dst_gy); +#endif + + // Output pixels +#ifdef GRAD_X + short8 gx = (short8)0; +#endif +#ifdef GRAD_Y + short8 gy = (short8)0; +#endif + + // Row0 + uchar16 temp = vload16(0, offset(&src, -1, -1)); + short8 left = convert_short8(temp.s01234567); + short8 middle = convert_short8(temp.s12345678); + short8 right = convert_short8(temp.s23456789); +#ifdef GRAD_X + gx += left * (short8)(-1); + gx += right * (short8)(+1); +#endif +#ifdef GRAD_Y + gy += left * (short8)(-1); + gy += middle * (short8)(-2); + gy += right * (short8)(-1); +#endif + + // Row1 + temp = vload16(0, offset(&src, -1, 0)); + left = convert_short8(temp.s01234567); + right = convert_short8(temp.s23456789); +#ifdef GRAD_X + gx += left * (short8)(-2); + gx += right * (short8)(+2); +#endif + + // Row2 + temp = vload16(0, offset(&src, -1, 1)); + left = convert_short8(temp.s01234567); + middle = convert_short8(temp.s12345678); + right = convert_short8(temp.s23456789); +#ifdef GRAD_X + gx += left * (short8)(-1); + gx += right * (short8)(+1); +#endif +#ifdef GRAD_Y + gy += left * (short8)(+1); + gy += middle * (short8)(+2); + gy += right * (short8)(+1); +#endif + + // Store results +#ifdef GRAD_X + vstore8(gx, 0, ((__global short *)dst_gx.ptr)); +#endif +#ifdef GRAD_Y + vstore8(gy, 0, ((__global short *)dst_gy.ptr)); +#endif +} + +/**********************************************/ +/* End implementation of Sobel3x3 filter */ +/**********************************************/ + +/***********************************************/ +/* Begin implementation of Sobel5x5 filter */ +/***********************************************/ + +/** Compute a 1D horizontal sobel filter 1x5 for 8 bytes assuming the input is made of 1 channel of 1 byte (i.e 8 pixels). + * + * @param[in] src Pointer to source image. + * @param[in] left1_coeff_gx Weight of the most left pixel for gx + * @param[in] left2_coeff_gx Weight of the left pixel for gx + * @param[in] middle_coeff_gx Weight of the middle pixel for gx + * @param[in] right1_coeff_gx Weight of the right pixel for gx + * @param[in] right2_coeff_gx Weight of the most right pixel for gx + * @param[in] left1_coeff_gy Weight of the most left pixel for gy + * @param[in] left2_coeff_gy Weight of the left pixel for gy + * @param[in] middle_coeff_gy Weight of the middle pixel for gy + * @param[in] right1_coeff_gy Weight of the right pixel for gy + * @param[in] right2_coeff_gy Weight of the most right pixel for gy + * + * @return a short16 containing short8 gx and short8 gy values. + */ +short16 sobel1x5( + Image *src, + const short left1_coeff_gx, + const short left2_coeff_gx, + const short middle_coeff_gx, + const short right1_coeff_gx, + const short right2_coeff_gx, + const short left1_coeff_gy, + const short left2_coeff_gy, + const short middle_coeff_gy, + const short right1_coeff_gy, + const short right2_coeff_gy) +{ + uchar16 temp = vload16(0, offset(src, -2, 0)); + short8 gx = 0; + short8 gy = 0; + short8 val; + + val = convert_short8(temp.s01234567); + gx += val * (short8)left1_coeff_gx; + gy += val * (short8)left1_coeff_gy; + + val = convert_short8(temp.s12345678); + gx += val * (short8)left2_coeff_gx; + gy += val * (short8)left2_coeff_gy; + + val = convert_short8(temp.s23456789); + gx += val * (short8)middle_coeff_gx; + gy += val * (short8)middle_coeff_gy; + + val = convert_short8(temp.s3456789a); + gx += val * (short8)right1_coeff_gx; + gy += val * (short8)right1_coeff_gy; + + val = convert_short8(temp.s456789ab); + gx += val * (short8)right2_coeff_gx; + gy += val * (short8)right2_coeff_gy; + + return (short16)(gx, gy); +} + +/** Compute a 1D vertical sobel filter 5x1 for 8 bytes assuming the input is made of 1 channel of 1 byte (i.e 8 pixels). + * + * @param[in] src Pointer to source image. + * @param[in] up1_coeff Weight of the most up pixel + * @param[in] up2_coeff Weight of the up pixel + * @param[in] middle_coeff Weight of the middle pixel + * @param[in] down1_coeff Weight of the down pixel + * @param[in] down2_coeff Weight of the most down pixel + * + * @return a short8 containing 8 convoluted values. + */ +short8 sobel5x1( + Image *src, + const short up1_coeff, + const short up2_coeff, + const short middle_coeff, + const short down1_coeff, + const short down2_coeff) +{ + short8 val; + short8 out = (short8)0; + + val = vload8(0, (__global short *)offset(src, 0, -2)); + out += val * (short8)up1_coeff; + + val = vload8(0, (__global short *)offset(src, 0, -1)); + out += val * (short8)up2_coeff; + + val = vload8(0, (__global short *)offset(src, 0, 0)); + out += val * (short8)middle_coeff; + + val = vload8(0, (__global short *)offset(src, 0, 1)); + out += val * (short8)down1_coeff; + + val = vload8(0, (__global short *)offset(src, 0, 2)); + out += val * (short8)down2_coeff; + + return (short8)(out); +} + +/** Apply a 1x5 sobel matrix to a single channel U8 input image and output two temporary channel S16 images. + * + * @attention To enable computation of the X gradient -DGRAD_X must be passed at compile time, while computation of the Y gradient + * is performed when -DGRAD_Y is used. You can use both when computation of both gradients is required. + * + * @param[in] src_ptr Pointer to the source image.. Supported data types: U8 + * @param[in] src_stride_x Stride of the source image in X dimension (in bytes) + * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] src_stride_y Stride of the source image in Y dimension (in bytes) + * @param[in] src_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source image + * @param[out] dst_gx_ptr Pointer to the destination image.. Supported data types: S16 + * @param[in] dst_gx_stride_x Stride of the destination image in X dimension (in bytes) + * @param[in] dst_gx_step_x dst_gx_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] dst_gx_stride_y Stride of the destination image in Y dimension (in bytes) + * @param[in] dst_gx_step_y dst_gx_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] dst_gx_offset_first_element_in_bytes The offset of the first element in the destination image + * @param[out] dst_gy_ptr Pointer to the destination image. Supported data types: S16 + * @param[in] dst_gy_stride_x Stride of the destination image in X dimension (in bytes) + * @param[in] dst_gy_step_x dst_gy_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] dst_gy_stride_y Stride of the destination image in Y dimension (in bytes) + * @param[in] dst_gy_step_y dst_gy_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] dst_gy_offset_first_element_in_bytes The offset of the first element in the destination image + */ +__kernel void sobel_separable1x5( + IMAGE_DECLARATION(src) +#ifdef GRAD_X + , + IMAGE_DECLARATION(dst_gx) +#endif +#ifdef GRAD_Y + , + IMAGE_DECLARATION(dst_gy) +#endif +) +{ + Image src = CONVERT_TO_IMAGE_STRUCT(src); +#ifdef GRAD_X + Image dst_gx = CONVERT_TO_IMAGE_STRUCT(dst_gx); +#endif +#ifdef GRAD_Y + Image dst_gy = CONVERT_TO_IMAGE_STRUCT(dst_gy); +#endif + + // Output pixels + short16 gx_gy = sobel1x5(&src, + -1, -2, 0, 2, 1, + 1, 4, 6, 4, 1); + + // Store result in dst +#ifdef GRAD_X + vstore8(gx_gy.s01234567, 0, ((__global short *)dst_gx.ptr)); +#endif +#ifdef GRAD_Y + vstore8(gx_gy.s89ABCDEF, 0, ((__global short *)dst_gy.ptr)); +#endif +} + +/** Apply a 5x1 convolution matrix to two single channel S16 input temporary images + * and output two single channel S16 images. + * + * @attention To enable computation of the X gradient -DGRAD_X must be passed at compile time, while computation of the Y gradient + * is performed when -DGRAD_Y is used. You can use both when computation of both gradients is required. + * + * @param[in] src_x_ptr Pointer to the source image.. Supported data types: S16 + * @param[in] src_x_stride_x Stride of the source image in X dimension (in bytes) + * @param[in] src_x_step_x src_x_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] src_x_stride_y Stride of the source image in Y dimension (in bytes) + * @param[in] src_x_step_y src_x_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] src_x_offset_first_element_in_bytes The offset of the first element in the source image + * @param[out] dst_gx_ptr Pointer to the destination image. Supported data types: S16 + * @param[in] dst_gx_stride_x Stride of the destination image in X dimension (in bytes) + * @param[in] dst_gx_step_x dst_gx_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] dst_gx_stride_y Stride of the destination image in Y dimension (in bytes) + * @param[in] dst_gx_step_y dst_gx_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] dst_gx_offset_first_element_in_bytes The offset of the first element in the destination image + * @param[in] src_y_ptr Pointer to the source image. Supported data types: S16 + * @param[in] src_y_stride_x Stride of the source image in X dimension (in bytes) + * @param[in] src_y_step_x src_y_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] src_y_stride_y Stride of the source image in Y dimension (in bytes) + * @param[in] src_y_step_y src_y_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] src_y_offset_first_element_in_bytes The offset of the first element in the source image + * @param[out] dst_gy_ptr Pointer to the destination image. Supported data types: S16 + * @param[in] dst_gy_stride_x Stride of the destination image in X dimension (in bytes) + * @param[in] dst_gy_step_x dst_gy_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] dst_gy_stride_y Stride of the destination image in Y dimension (in bytes) + * @param[in] dst_gy_step_y dst_gy_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] dst_gy_offset_first_element_in_bytes The offset of the first element in the destination image + * @param[in] dummy Dummy parameter to easy conditional inclusion + */ +__kernel void sobel_separable5x1( +#ifdef GRAD_X + IMAGE_DECLARATION(src_x), + IMAGE_DECLARATION(dst_gx), +#endif +#ifdef GRAD_Y + IMAGE_DECLARATION(src_y), + IMAGE_DECLARATION(dst_gy), +#endif + int dummy) +{ +#ifdef GRAD_X + Image src_x = CONVERT_TO_IMAGE_STRUCT(src_x); + Image dst_gx = CONVERT_TO_IMAGE_STRUCT(dst_gx); +#endif +#ifdef GRAD_Y + Image src_y = CONVERT_TO_IMAGE_STRUCT(src_y); + Image dst_gy = CONVERT_TO_IMAGE_STRUCT(dst_gy); +#endif + +#ifdef GRAD_X + short8 gx = sobel5x1(&src_x, + 1, 4, 6, 4, 1); + vstore8(gx, 0, ((__global short *)dst_gx.ptr)); +#endif +#ifdef GRAD_Y + short8 gy = sobel5x1(&src_y, + -1, -2, 0, 2, 1); + vstore8(gy, 0, ((__global short *)dst_gy.ptr)); +#endif +} + +/**********************************************/ +/* End implementation of Sobel5x5 filter */ +/**********************************************/ + +/***********************************************/ +/* Begin implementation of Sobel7x7 filter */ +/***********************************************/ + +/* Sobel 1x7 horizontal X / 7x1 vertical Y coefficients */ +#define X0 -1 +#define X1 -4 +#define X2 -5 +#define X3 0 +#define X4 5 +#define X5 4 +#define X6 1 + +/* Sobel 1x7 vertical X / 7x1 horizontal Y coefficients */ +#define Y0 1 +#define Y1 6 +#define Y2 15 +#define Y3 20 +#define Y4 15 +#define Y5 6 +#define Y6 1 + +/* Calculates single horizontal iteration. */ +#define SOBEL1x1_HOR(src, gx, gy, idx) \ + { \ + int8 val = convert_int8(vload8(0, offset(src, idx - 3, 0))); \ + gx += val * X##idx; \ + gy += val * Y##idx; \ + } + +/* Calculates single vertical iteration. */ +#define SOBEL1x1_VERT(src, g, direction, idx) \ + { \ + int8 val = vload8(0, (__global int *)offset(src, 0, idx - 3)); \ + g += val * (int8)direction##idx; \ + } + +/* Calculates a 1x7 horizontal iteration. */ +#define SOBEL1x7(ptr, gx, gy) \ + SOBEL1x1_HOR(ptr, gx, gy, 0) \ + SOBEL1x1_HOR(ptr, gx, gy, 1) \ + SOBEL1x1_HOR(ptr, gx, gy, 2) \ + SOBEL1x1_HOR(ptr, gx, gy, 3) \ + SOBEL1x1_HOR(ptr, gx, gy, 4) \ + SOBEL1x1_HOR(ptr, gx, gy, 5) \ + SOBEL1x1_HOR(ptr, gx, gy, 6) + +/* Calculates a 7x1 vertical iteration. */ +#define SOBEL7x1(ptr, g, direction) \ + SOBEL1x1_VERT(ptr, g, direction, 0) \ + SOBEL1x1_VERT(ptr, g, direction, 1) \ + SOBEL1x1_VERT(ptr, g, direction, 2) \ + SOBEL1x1_VERT(ptr, g, direction, 3) \ + SOBEL1x1_VERT(ptr, g, direction, 4) \ + SOBEL1x1_VERT(ptr, g, direction, 5) \ + SOBEL1x1_VERT(ptr, g, direction, 6) + +/** Apply a 1x7 sobel matrix to a single channel U8 input image and output two temporary channel S16 images and leave the borders undefined. + * + * @attention To enable computation of the X gradient -DGRAD_X must be passed at compile time, while computation of the Y gradient + * is performed when -DGRAD_Y is used. You can use both when computation of both gradients is required. + * + * @param[in] src_ptr Pointer to the source image. Supported data types: U8 + * @param[in] src_stride_x Stride of the source image in X dimension (in bytes) + * @param[in] src_step_x src_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] src_stride_y Stride of the source image in Y dimension (in bytes) + * @param[in] src_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] src_offset_first_element_in_bytes The offset of the first element in the source image + * @param[out] dst_gx_ptr Pointer to the destination image. Supported data types: S32 + * @param[in] dst_gx_stride_x Stride of the destination image in X dimension (in bytes) + * @param[in] dst_gx_step_x dst_gx_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] dst_gx_stride_y Stride of the destination image in Y dimension (in bytes) + * @param[in] dst_gx_step_y dst_gx_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] dst_gx_offset_first_element_in_bytes The offset of the first element in the destination image + * @param[out] dst_gy_ptr Pointer to the destination image. Supported data types: S32 + * @param[in] dst_gy_stride_x Stride of the destination image in X dimension (in bytes) + * @param[in] dst_gy_step_x dst_gy_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] dst_gy_stride_y Stride of the destination image in Y dimension (in bytes) + * @param[in] dst_gy_step_y dst_gy_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] dst_gy_offset_first_element_in_bytes The offset of the first element in the destination image + */ +__kernel void sobel_separable1x7( + IMAGE_DECLARATION(src) +#ifdef GRAD_X + , + IMAGE_DECLARATION(dst_gx) +#endif +#ifdef GRAD_Y + , + IMAGE_DECLARATION(dst_gy) +#endif +) +{ + Image src = CONVERT_TO_IMAGE_STRUCT(src); +#ifdef GRAD_X + Image dst_gx = CONVERT_TO_IMAGE_STRUCT(dst_gx); +#endif +#ifdef GRAD_Y + Image dst_gy = CONVERT_TO_IMAGE_STRUCT(dst_gy); +#endif + int8 gx = (int8)0; + int8 gy = (int8)0; + + SOBEL1x7(&src, gx, gy); + + // Store result in dst +#ifdef GRAD_X + vstore8(gx, 0, ((__global int *)dst_gx.ptr)); +#endif +#ifdef GRAD_Y + vstore8(gy, 0, ((__global int *)dst_gy.ptr)); +#endif +} + +/** Apply a 7x1 convolution matrix to two single channel S16 input temporary images and output two single channel S16 images and leave the borders undefined. + * + * @attention To enable computation of the X gradient -DGRAD_X must be passed at compile time, while computation of the Y gradient + * is performed when -DGRAD_Y is used. You can use both when computation of both gradients is required. + * + * @param[in] src_x_ptr Pointer to the source image. Supported data types: S32 + * @param[in] src_x_stride_x Stride of the source image in X dimension (in bytes) + * @param[in] src_x_step_x src_x_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] src_x_stride_y Stride of the source image in Y dimension (in bytes) + * @param[in] src_x_step_y src_x_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] src_x_offset_first_element_in_bytes The offset of the first element in the source image + * @param[out] dst_gx_ptr Pointer to the destination image. Supported data types: S16 + * @param[in] dst_gx_stride_x Stride of the destination image in X dimension (in bytes) + * @param[in] dst_gx_step_x dst_gx_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] dst_gx_stride_y Stride of the destination image in Y dimension (in bytes) + * @param[in] dst_gx_step_y dst_gx_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] dst_gx_offset_first_element_in_bytes The offset of the first element in the destination image + * @param[in] src_y_ptr Pointer to the source image. Supported data types: S32 + * @param[in] src_y_stride_x Stride of the source image in X dimension (in bytes) + * @param[in] src_y_step_x src_y_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] src_y_stride_y Stride of the source image in Y dimension (in bytes) + * @param[in] src_y_step_y src_y_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] src_y_offset_first_element_in_bytes The offset of the first element in the source image + * @param[out] dst_gy_ptr Pointer to the destination image. Supported data types: S16 + * @param[in] dst_gy_stride_x Stride of the destination image in X dimension (in bytes) + * @param[in] dst_gy_step_x dst_gy_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] dst_gy_stride_y Stride of the destination image in Y dimension (in bytes) + * @param[in] dst_gy_step_y dst_gy_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] dst_gy_offset_first_element_in_bytes The offset of the first element in the destination image + * @param[in] dummy Dummy parameter to easy conditional inclusion + */ +__kernel void sobel_separable7x1( +#ifdef GRAD_X + IMAGE_DECLARATION(src_x), + IMAGE_DECLARATION(dst_gx), +#endif +#ifdef GRAD_Y + IMAGE_DECLARATION(src_y), + IMAGE_DECLARATION(dst_gy), +#endif + int dummy) +{ +#ifdef GRAD_X + Image src_x = CONVERT_TO_IMAGE_STRUCT(src_x); + Image dst_gx = CONVERT_TO_IMAGE_STRUCT(dst_gx); +#endif +#ifdef GRAD_Y + Image src_y = CONVERT_TO_IMAGE_STRUCT(src_y); + Image dst_gy = CONVERT_TO_IMAGE_STRUCT(dst_gy); +#endif + + // Output pixels +#ifdef GRAD_X + int8 gx = 0; + SOBEL7x1(&src_x, gx, Y); + vstore8(gx, 0, (__global int *)dst_gx.ptr); +#endif +#ifdef GRAD_Y + int8 gy = 0; + SOBEL7x1(&src_y, gy, X); + vstore8(gy, 0, (__global int *)dst_gy.ptr); +#endif +} + +/**********************************************/ +/* End implementation of Sobel7x7 filter */ +/**********************************************/ |