Film Noir Example

#include <stdio.h>
#include <stdlib.h>
 
#define STB_IMAGE_IMPLEMENTATION
#include "stb_image/stb_image.h"
#define STB_IMAGE_WRITE_IMPLEMENTATION
#include "stb_image/stb_image_write.h"
 
int main(void) {  
    int width, height, channels;  
    unsigned char* inputImage = stbi_load("test.jpg", &width, &height, &channels, 0);  
    if (inputImage) {  
        unsigned char* outputImage = (unsigned char*)calloc(width * channels * height * sizeof(unsigned char), 1);  
        if (outputImage) {  
  
            int stride = width * channels;  
    
            int shadowCutoff = 10;
            int highlightCutoff = 90;
            int contrastBoost = 10;
            int contrastMidpoint = 50;
            int grainPercentage = 50;
            OC_STATUS status = ocularFilmNoirEffect(inputImage, outputImage, width, height, channels, stride, 
                            shadowCutoff, highlightCutoff, contrastBoost, contrastMidpoint, grainPercentage);
            if (status == OC_STATUS_OK) {
                stbi_write_jpg("test_out.jpg", width, height, channels, outputImage, 100);  
            }
        }  
        free(outputImage);  
    }  
  
    stbi_image_free(inputImage);  
}

Before

After