c语言实现根据色度信息(颜色,饱和度)增强其色彩鲜艳程度
时间: 2023-09-14 15:05:55 浏览: 133
调度算法 c语言实现
要实现根据色度信息增强色彩鲜艳程度的效果,可以使用以下步骤:
1. 读取图像数据并获取色度信息。
2. 将色度信息转换为HSV(Hue, Saturation, Value)颜色空间,其中H表示颜色,S表示饱和度,V表示亮度。
3. 对S进行增强,可以通过增加饱和度值来实现。可以使用以下公式进行计算:
newS = S + deltaS
其中,deltaS为饱和度增强量。
4. 将HSV颜色空间转换回RGB(Red, Green, Blue)颜色空间。
5. 将处理后的图像数据保存。
以下是一个简单的C语言代码示例:
```c
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
typedef struct {
unsigned char r, g, b;
} RGB;
typedef struct {
float h, s, v;
} HSV;
void RGBtoHSV(RGB rgb, HSV* hsv) {
float r = rgb.r / 255.0, g = rgb.g / 255.0, b = rgb.b / 255.0;
float max = fmaxf(fmaxf(r, g), b), min = fminf(fminf(r, g), b);
float delta = max - min;
hsv->v = max;
hsv->s = max == 0 ? 0 : delta / max;
if (max == min) {
hsv->h = 0;
} else if (max == r) {
hsv->h = (g - b) / delta + (g < b ? 6 : 0);
} else if (max == g) {
hsv->h = (b - r) / delta + 2;
} else if (max == b) {
hsv->h = (r - g) / delta + 4;
}
hsv->h /= 6;
}
void HSVtoRGB(HSV hsv, RGB* rgb) {
float r, g, b;
int i = hsv.h * 6;
float f = hsv.h * 6 - i;
float p = hsv.v * (1 - hsv.s);
float q = hsv.v * (1 - f * hsv.s);
float t = hsv.v * (1 - (1 - f) * hsv.s);
switch (i % 6) {
case 0: r = hsv.v, g = t, b = p; break;
case 1: r = q, g = hsv.v, b = p; break;
case 2: r = p, g = hsv.v, b = t; break;
case 3: r = p, g = q, b = hsv.v; break;
case 4: r = t, g = p, b = hsv.v; break;
case 5: r = hsv.v, g = p, b = q; break;
}
rgb->r = r * 255.0;
rgb->g = g * 255.0;
rgb->b = b * 255.0;
}
void enhanceColorfulness(RGB* image, int width, int height, float deltaS) {
for (int i = 0; i < width * height; i++) {
HSV hsv;
RGBtoHSV(image[i], &hsv);
hsv.s += deltaS;
if (hsv.s > 1) hsv.s = 1;
HSVtoRGB(hsv, &image[i]);
}
}
int main(int argc, char* argv[]) {
if (argc < 4) {
printf("Usage: %s input output deltaS\n", argv[0]);
return 1;
}
char* inputFileName = argv[1];
char* outputFileName = argv[2];
float deltaS = atof(argv[3]);
FILE* inputFile = fopen(inputFileName, "rb");
if (!inputFile) {
printf("Failed to open input file: %s\n", inputFileName);
return 1;
}
fseek(inputFile, 0, SEEK_END);
int fileSize = ftell(inputFile);
fseek(inputFile, 0, SEEK_SET);
int width, height;
fread(&width, sizeof(int), 1, inputFile);
fread(&height, sizeof(int), 1, inputFile);
RGB* image = (RGB*)malloc(width * height * sizeof(RGB));
fread(image, sizeof(RGB), width * height, inputFile);
fclose(inputFile);
enhanceColorfulness(image, width, height, deltaS);
FILE* outputFile = fopen(outputFileName, "wb");
if (!outputFile) {
printf("Failed to open output file: %s\n", outputFileName);
return 1;
}
fwrite(&width, sizeof(int), 1, outputFile);
fwrite(&height, sizeof(int), 1, outputFile);
fwrite(image, sizeof(RGB), width * height, outputFile);
fclose(outputFile);
free(image);
return 0;
}
```
这个示例代码读取一个RGB图像文件,对其进行色彩增强,并将处理后的图像保存为RGB图像文件。可以通过命令行参数指定输入文件、输出文件和饱和度增强量。
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