[Olena-patches] olena: olena-2.0-571-g929c08c Create blured copies of original image

--- milena/sandbox/anthony/Makefile | 11 ++- milena/sandbox/anthony/src/scale_space.cc | 114 ++++++++++++++++++++++++----- 2 files changed, 103 insertions(+), 22 deletions(-) diff --git a/milena/sandbox/anthony/Makefile b/milena/sandbox/anthony/Makefile index 7f990da..81f788e 100644 --- a/milena/sandbox/anthony/Makefile +++ b/milena/sandbox/anthony/Makefile @@ -1,8 +1,8 @@ CCACHE=ccache CC=g++ -CFLAGS=-Wall -Werror -O3 -DNDEBUG -CLIBS=-I../../../scribo/ -I../../ -CLEAN=*.o output/* log final.xml *.pgm +CFLAGS=-Wall -Werror +CLIBS=-I../../ +CLEAN=*.o output/* log SRC=src/scale_space.cc OUTPUT=a.out @@ -10,7 +10,10 @@ OUTPUT=a.out all: scale scale: - $(CCACHE) $(CC) $(CFLAGS) $(CLIBS) $(SRC) -o $(OUTPUT) + $(CCACHE) $(CC) $(CFLAGS) -O2 -DNDEBUG $(CLIBS) $(SRC) -o $(OUTPUT) + +debug: + $(CCACHE) $(CC) $(CFLAGS) -g -ggdb $(CLIBS) $(SRC) -o $(OUTPUT) clean: rm -rf $(CLEAN) diff --git a/milena/sandbox/anthony/src/scale_space.cc b/milena/sandbox/anthony/src/scale_space.cc index 9e452a3..31180af 100644 --- a/milena/sandbox/anthony/src/scale_space.cc +++ b/milena/sandbox/anthony/src/scale_space.cc @@ -1,36 +1,114 @@ -#include <mln/binarization/all.hh> - #include <mln/core/image/image2d.hh> - +#include <mln/core/alias/neighb2d.hh> #include <mln/data/all.hh> -#include <mln/draw/line.hh> +#include <mln/io/pgm/all.hh> +#include <mln/literal/all.hh> +#include <mln/value/all.hh> +#include <mln/make/w_window2d.hh> +#include <mln/core/alias/w_window2d_int.hh> -#include <mln/fun/v2v/rgb_to_luma.hh> +#include <cmath> -#include <mln/io/pgm/all.hh> +using namespace mln; -#include <mln/labeling/all.hh> -#include <mln/literal/all.hh> -#include <mln/logical/and.hh> +// Set the gaussian kernel of size (6 * t + 1) +double *gaussian_kernel(unsigned t) +{ + int size = 6 * t + 1; + unsigned index = 0; + double *kernel = new double[size * size]; + static const double pi = 4.0 * atan(1.0); + double div = (2.0 * pi * t * t); -#include <mln/value/all.hh> + for (int i = -(size / 2); i < (size / 2) + 1; ++i) + { + for (int j = -(size / 2); j < (size / 2) + 1; ++j) + { + double e = exp(- (i * i + j * j) / (2.0 * t * t) ); + kernel[index++] = e / div; + } + } -#include <tesseract/baseapi.h> + return kernel; +} -#include <scribo/binarization/sauvola.hh> -#include <scribo/core/component_set.hh> -#include <scribo/preprocessing/denoise_fg.hh> -#include <scribo/primitive/extract/all.hh> +// Apply the convolution of the image by the kernel +template<typename I> +void convolve(const I& original, I& filtered, double *kernel, unsigned t) +{ + mln_piter(I) p(filtered.domain()); + int size = 6 * t + 1; + window2d win; -using namespace mln; + for (int i = -(size / 2); i < (size / 2) + 1; ++i) + { + for (int j = -(size / 2); j < (size / 2) + 1; ++j) + { + win.insert(i, j); + } + } + + + // Iterate through all image sites + for_all(p) + { + // Create the window around the site + mln_qiter(window2d) q(win, p); + float sum = 0; + int index = 0; + // Iterate through all window image sites + for_all(q) + { + if (filtered.has(q)) + sum += original(q) * kernel[index++]; + else + sum += 127 * kernel[index++]; + } + + filtered(p) = static_cast<int>(sum); + } +} + +// Blur the image thanks to a convolution matrix +template<typename I> +image2d<value::int_u8> blur(const I& original, unsigned t) +{ + I filtered; + double *kernel = gaussian_kernel(t); + + initialize(filtered, original); + convolve(original, filtered, kernel, t); + + return filtered; +} + +template<typename I> +void downscaleResolution(const I& original, I& toReduce) +{ +} + +// MAIN ENTRY POINT int main(int argc, char** argv) { image2d<value::int_u8> original; + io::pgm::load(original, "images/flower.pgm"); + + image2d<value::int_u8> blur1, blur2, blur4; + initialize(blur1, original); + initialize(blur2, original); + initialize(blur4, original); + + io::pgm::save(original, "output/original.pgm"); + + blur1 = blur(original, 1); + io::pgm::save(blur1, "output/blur1.pgm"); - io::pgm::load(original, "images/keith.pgm"); + blur2 = blur(original, 2); + io::pgm::save(blur2, "output/blur2.pgm"); - io::pgm::save(original, "final.pgm"); + blur4 = blur(original, 4); + io::pgm::save(blur4, "output/blur4.pgm"); return 0; } -- 1.7.2.5