174 lines
4.9 KiB
C++
174 lines
4.9 KiB
C++
#include <iostream>
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#include <memory>
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#include "cvimagex.h"
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#include "opencv2/opencv.hpp"
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#include <FreeImagePlus.h>
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#include "StopWatch.h"
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#include <iostream>
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#include "iimageencode.h"
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#include "imageencode.h"
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std::vector<double> caculate(const std::vector<double>& points_x, const std::vector<double>& points_y)
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{
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int MaxElement = points_x.size() - 1;
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//计算常数f
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double f = points_y[0];
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//求解
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int n, m;
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//double a[MaxElement][MaxElement+1];
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std::vector<std::vector<double>> a;
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//a.resize(MaxElement);
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for (int i = 0; i < MaxElement; i++)
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{
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std::vector<double> b;
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b.resize(MaxElement + 1);
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a.push_back(b);
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}
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for (int i = 0; i < MaxElement; i++)
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{
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for (int j = 0; j < MaxElement; j++)
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a[i][j] = cv::pow(points_x[i + 1], MaxElement - j);
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a[i][MaxElement] = points_y[i + 1] - f;
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}
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int i, j;
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n = MaxElement;
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for (j = 0; j < n; j++)
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{
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double max = 0;
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double imax = 0;
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for (i = j; i < n; i++)
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if (imax < cv::abs(a[i][j]))
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{
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imax = cv::abs(a[i][j]);
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max = a[i][j];//得到各行中所在列最大元素
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m = i;
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}
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if (cv::abs(a[j][j]) != max)
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{
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double b = 0;
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for (int k = j; k < n + 1; k++)
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{
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b = a[j][k];
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a[j][k] = a[m][k];
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a[m][k] = b;
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}
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}
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for (int r = j; r < n + 1; r++)
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a[j][r] = a[j][r] / max;//让该行的所在列除以所在列的第一个元素，目的是让首元素为1
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for (i = j + 1; i < n; i++)
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{
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double c = a[i][j];
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if (c == 0.0) continue;
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for (int s = j; s < n + 1; s++)
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a[i][s] = a[i][s] - a[j][s] * c;//前后行数相减，使下一行或者上一行的首元素为0
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}
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}
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for (i = n - 2; i >= 0; i--)
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for (j = i + 1; j < n; j++)
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a[i][n] = a[i][n] - a[j][n] * a[i][j];
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std::vector<double> result;
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for (int k = 0; k < n; k++)
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result.push_back(a[k][n]);
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result.push_back(f);
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return result;
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}
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void hsvCorrect_init(uint* table)
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{
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cv::Mat mat_rgbTable(256 * 256, 256, CV_8UC3);
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uchar* ptr_mat_rgbTable = mat_rgbTable.data;
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for (size_t r = 0; r < 256; r++)
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for (size_t g = 0; g < 256; g++)
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for (size_t b = 0; b < 256; b++, ptr_mat_rgbTable += 3)
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{
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ptr_mat_rgbTable[0] = b;
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ptr_mat_rgbTable[1] = g;
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ptr_mat_rgbTable[2] = r;
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}
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cv::cvtColor(mat_rgbTable, mat_rgbTable, cv::COLOR_BGR2HSV_FULL);
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uchar table_data[256];
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cv::Mat tableLUT(256, 1, CV_8UC1, table_data);
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std::vector<double> points_x, points_y, coefficient;
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points_x = { 0, 80, 175, 255 };
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points_y = { 12, 85, 175, 270 };
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coefficient = caculate(points_x, points_y);
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for (int j = 0; j < 256; j++)
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table_data[j] = static_cast<int>(cv::max(0.0, coefficient[0] * j * j * j + coefficient[1] * j * j + coefficient[2] * j + coefficient[3]));
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cv::Mat hsv_ms[3];
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cv::split(mat_rgbTable, hsv_ms);
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cv::LUT(hsv_ms[0], tableLUT, hsv_ms[0]);
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cv::merge(hsv_ms, 3, mat_rgbTable);
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cv::cvtColor(mat_rgbTable, mat_rgbTable, cv::COLOR_HSV2BGR_FULL);
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cv::Mat mat_bgr32(256, 256 * 256, CV_8UC4);
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cv::cvtColor(mat_rgbTable, mat_bgr32, cv::COLOR_BGR2BGRA);
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memcpy(table, mat_bgr32.data, mat_bgr32.total() * sizeof(uint));
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}
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void hsvCorrect(cv::Mat& image, uint* table)
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{
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if (image.channels() != 3)
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return;
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cv::Mat bgra;
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cv::cvtColor(image, bgra, cv::COLOR_BGR2BGRA);
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uint* ptr = bgra.ptr<uint>();
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int rows = bgra.rows, cols = bgra.cols;
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for (int i = 0; i < rows; i++)
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{
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ptr = reinterpret_cast<uint*>(bgra.ptr(i));
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for (int j = 0; j < cols; j++)
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ptr[j] = table[ptr[j] & 0x00ffffff];
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}
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cv::cvtColor(bgra, image, cv::COLOR_BGRA2BGR);
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}
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static std::string read_all_from(std::string path)
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{
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int t;
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FILE* file = fopen(path.c_str(), "rb");
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fseek(file, 0, SEEK_END);
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t = ftell(file);
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std::string buf(t, 0);
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fseek(file, 0, SEEK_SET);
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fread((void*)buf.c_str(), t, 1, file);
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fclose(file);
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return buf;
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}
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int main()
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{
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//std::string straa = read_all_from("/mnt/d/3.tif");
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//fipMemoryIO mio((unsigned char*)straa.c_str(), straa.size());
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//auto filet = mio.getFileType();
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uint *table =new uint[256*256*256];
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hsvCorrect_init(table);
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for(int i =1;i<5;i++){
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//std::string imgpath = "/home/img/Scan"+std::to_string(i)+".jpg";
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std::string imgpath = "/home/scan_0016.jpg";
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cv::Mat mat=cv::imread(imgpath,cv::IMREAD_COLOR);
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StopWatch sw;
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hsvCorrect(mat,table);
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printf("\n hsvCorrect %f ",sw.elapsed_ms());
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cv::imwrite("/home/Scan"+std::to_string(i)+"done.jpg",mat);
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}
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delete []table;
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// ImageEncodePtr encoder(new BmpImageEncode());
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// encoder->encode(mat);
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return 0;
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} |