fil/docs/snippets/c/ocr/image_preprocessing.md

#include "kreuzberg.h"
#include <stdio.h>

int main(void) {
    const char *config_json =
        "{"
        "\"images\": {"
        "\"extract_images\": true,"
        "\"target_dpi\": 300,"
        "\"max_image_dimension\": 4096,"
        "\"auto_adjust_dpi\": true,"
        "\"min_dpi\": 150,"
        "\"max_dpi\": 600"
        "}"
        "}";

    KREUZBERGExtractionConfig *config = kreuzberg_extraction_config_from_json(config_json);
    if (!config) {
        fprintf(stderr, "config parse failed (code %d): %s\n",
                kreuzberg_last_error_code(),
                kreuzberg_last_error_context());
        return 1;
    }

    KREUZBERGExtractionResult *result =
        kreuzberg_extract_file_sync("document.pdf", NULL, config);
    if (!result) {
        fprintf(stderr, "extraction failed (code %d): %s\n",
                kreuzberg_last_error_code(),
                kreuzberg_last_error_context());
        kreuzberg_extraction_config_free(config);
        return 1;
    }

    char *content = kreuzberg_extraction_result_content(result);
    printf("%s\n", content ? content : "(empty)");
    kreuzberg_free_string(content);

    kreuzberg_extraction_result_free(result);
    kreuzberg_extraction_config_free(config);
    return 0;
}