サンプルコード
[HDR合成]

基本的な使用例

コード

#include "fie.h"
#include "oal_aloc.h"

//linear crf + hood
INT do_hdr_linear_hood() {

    // 画像のパス
    const CHAR* file_names[] = {
        "input_img_files/00.bmp",
        "input_img_files/01.bmp",
        "input_img_files/02.bmp"
    };

    //露光量例
    const DOUBLE exposure_ratios[] = {1.0,2.0,3.0};

    INT status = F_ERR_UNKNOWN;

    INT img_num = -1;
    INT ratios_num = -1;

    FHANDLE imgstack = NULL;
    FHANDLE hdst = NULL;
    FHANDLE hdst_uc8 = NULL;
    FHANDLE hdr_object=NULL;

    FHANDLE himg_temp = NULL;

    INT width, height;
    INT dst_type;
    INT dst_ch;

    INT width_temp, height_temp;
    INT ch_temp, type_temp;

    INT i;

    img_num = sizeof(file_names) / sizeof(file_names[0]);
    ratios_num = sizeof(exposure_ratios) / sizeof(exposure_ratios[0]);

    if (img_num < 2) {
        status = F_ERR_INVALID_IMAGE;
        goto EXIT;
    }

    if (img_num != ratios_num) {
        status = F_ERR_INVALID_PARAM;
        goto EXIT;
    }

    //最初の一枚目の画像読み込み（これを基準にする）
    {
        status = fnFIE_load_img_file(file_names[0], &himg_temp, F_COLOR_IMG_TYPE_UC8);
        if (status != F_ERR_NONE) { goto EXIT; }

        status = fnFIE_img_get_params(himg_temp, &ch_temp, &type_temp, NULL, &width_temp, &height_temp);
        if (status != F_ERR_NONE) { goto EXIT; }

        fnFIE_free_object(himg_temp);
        himg_temp = NULL;

    }

    //入力画像スタック作成
    {
        imgstack = fnFIE_imgstack_alloc(F_IMGSTACK_ROOT_MODE, TRUE);
        if (imgstack == NULL) {
            status = F_ERR_NOMEMORY;
            goto EXIT;
        }

        for (i = 0; i < img_num; i++) {

            status = fnFIE_load_img_file(file_names[i], &himg_temp, F_COLOR_IMG_TYPE_UC8);
            if (status != F_ERR_NONE) { goto EXIT; }

            status = fnFIE_imgstack_push_back(imgstack, himg_temp);
            if (status != F_ERR_NONE) { goto EXIT; }
            fnFIE_free_object(himg_temp);
            himg_temp = NULL;

        }
    }

    //出力画像準備
    {
        width = width_temp;
        height = height_temp;
        dst_ch = ch_temp;
        dst_type = F_IMG_DOUBLE;

        hdst = fnFIE_img_root_alloc(dst_type, dst_ch, width, height);
        if (hdst == NULL) {
            status = F_ERR_NOMEMORY;
            goto EXIT;
        }
    }

    //出力画像(トーンマッピング後のUC8画像)準備
    {
        width = width_temp;
        height = height_temp;
        dst_ch = ch_temp;
        dst_type = F_IMG_UC8;

        hdst_uc8 = fnFIE_img_root_alloc(dst_type, dst_ch, width, height);
        if (hdst_uc8 == NULL) {
            status = F_ERR_NOMEMORY;
            goto EXIT;
        }
    }

    //linear_crf + hood
    {
        //execute(linear_crf):線形の場合はhdr_object==NULLでよい。
        status = fnFIE_hdr_execute(hdr_object, imgstack, hdst, exposure_ratios);
        if (status != F_ERR_NONE) { goto EXIT; }

        //tonemapping(hood)
        status = fnFIE_hdr_tonemap_hood(hdst,hdst_uc8,-1);
        if (status != F_ERR_NONE) { goto EXIT; }

        //executeではtonemapping必要
        //結果画像保存
        status = fnFIE_save_png("hdst_linear_hood.png", hdst_uc8, -1);
        if (status != F_ERR_NONE) { goto EXIT; }
    }

EXIT:
    fnFIE_free_object(imgstack);
    fnFIE_free_object(hdr_object);
    fnFIE_free_object(hdst);
    fnFIE_free_object(hdst_uc8);
    fnFIE_free_object(himg_temp);

    return status;
}

//robertson + hood
INT do_hdr_robertson_hood() {

    // 画像のパス
    const CHAR* file_names[] = {
        "input_img_files/00.bmp",
        "input_img_files/01.bmp",
        "input_img_files/02.bmp"
    };

    //露光量例
    const DOUBLE exposure_ratios[] = { 1.0,2.0,3.0 };

    INT status = F_ERR_UNKNOWN;

    INT img_num = -1;
    INT ratios_num = -1;

    FHANDLE imgstack = NULL;
    FHANDLE hdst = NULL;
    FHANDLE hdst_uc8 = NULL;
    FHANDLE hdr_object = NULL;

    FHANDLE himg_temp = NULL;

    INT width, height;
    INT dst_type;
    INT dst_ch;

    INT width_temp, height_temp;
    INT ch_temp, type_temp;

    INT iter_num;
    DOUBLE thresh;

    INT i;

    img_num = sizeof(file_names) / sizeof(file_names[0]);
    ratios_num = sizeof(exposure_ratios) / sizeof(exposure_ratios[0]);

    if (img_num < 2) {
        status = F_ERR_INVALID_IMAGE;
        goto EXIT;
    }

    if (img_num != ratios_num) {
        status = F_ERR_INVALID_PARAM;
        goto EXIT;
    }

    //最初の一枚目の画像読み込み（これを基準にする）
    {
        status = fnFIE_load_img_file(file_names[0], &himg_temp, F_COLOR_IMG_TYPE_UC8);
        if (status != F_ERR_NONE) { goto EXIT; }

        status = fnFIE_img_get_params(himg_temp, &ch_temp, &type_temp, NULL, &width_temp, &height_temp);
        if (status != F_ERR_NONE) { goto EXIT; }

        fnFIE_free_object(himg_temp);
        himg_temp = NULL;

    }

    //入力画像スタック作成
    {
        imgstack = fnFIE_imgstack_alloc(F_IMGSTACK_ROOT_MODE, TRUE);
        if (imgstack == NULL) {
            status = F_ERR_NOMEMORY;
            goto EXIT;
        }

        for (i = 0; i < img_num; i++) {

            status = fnFIE_load_img_file(file_names[i], &himg_temp, F_COLOR_IMG_TYPE_UC8);
            if (status != F_ERR_NONE) { goto EXIT; }

            status = fnFIE_imgstack_push_back(imgstack, himg_temp);
            if (status != F_ERR_NONE) { goto EXIT; }
            fnFIE_free_object(himg_temp);
            himg_temp = NULL;

        }
    }

    //出力画像準備
    {
        width = width_temp;
        height = height_temp;
        dst_ch = ch_temp;
        dst_type = F_IMG_DOUBLE;

        hdst = fnFIE_img_root_alloc(dst_type, dst_ch, width, height);
        if (hdst == NULL) {
            status = F_ERR_NOMEMORY;
            goto EXIT;
        }
    }

    //出力画像(トーンマッピング後のUC8画像)準備
    {
        width = width_temp;
        height = height_temp;
        dst_ch = ch_temp;
        dst_type = F_IMG_UC8;

        hdst_uc8 = fnFIE_img_root_alloc(dst_type, dst_ch, width, height);
        if (hdst_uc8 == NULL) {
            status = F_ERR_NOMEMORY;
            goto EXIT;
        }
    }

    //robertson + hood
    {
        iter_num = 30;
        thresh = 0.01;
        //hdrオブジェクト作成
        hdr_object = fnFIE_hdr_calibrate_robertson(imgstack,exposure_ratios,iter_num,thresh,&status);
        if (status != F_ERR_NONE) { goto EXIT; }

        //execute(robertson)
        status = fnFIE_hdr_execute(hdr_object, imgstack, hdst, exposure_ratios);
        if (status != F_ERR_NONE) { goto EXIT; }

        //tonemapping(hood)
        status = fnFIE_hdr_tonemap_hood(hdst, hdst_uc8, -1);
        if (status != F_ERR_NONE) { goto EXIT; }

        //executeではtonemapping必要
        //結果画像保存
        status = fnFIE_save_png("hdst_robertson_hood.png", hdst_uc8, -1);
        if (status != F_ERR_NONE) { goto EXIT; }
    }

EXIT:
    fnFIE_free_object(imgstack);
    fnFIE_free_object(hdr_object);
    fnFIE_free_object(hdst);
    fnFIE_free_object(hdst_uc8);
    fnFIE_free_object(himg_temp);

    return status;
}

//Mertens
INT do_hdr_mertens() {

    // 画像のパス
    const CHAR* file_names[] = {
        "input_img_files/00.bmp",
        "input_img_files/01.bmp",
        "input_img_files/02.bmp"
    };

    INT status = F_ERR_UNKNOWN;

    INT img_num = -1;

    FHANDLE imgstack = NULL;
    FHANDLE hdst = NULL;
    FHANDLE himg_temp = NULL;

    INT width, height;
    INT dst_type;
    INT dst_ch;

    INT width_temp, height_temp;
    INT ch_temp, type_temp;

    INT py_level;

    INT i;

    img_num = sizeof(file_names) / sizeof(file_names[0]);

    if (img_num < 2) {
        status = F_ERR_INVALID_IMAGE;
        goto EXIT;
    }

    //最初の一枚目の画像読み込み（これを基準にする）
    {
        status = fnFIE_load_img_file(file_names[0], &himg_temp, F_COLOR_IMG_TYPE_UC8);
        if (status != F_ERR_NONE) { goto EXIT; }

        status = fnFIE_img_get_params(himg_temp, &ch_temp, &type_temp, NULL, &width_temp, &height_temp);
        if (status != F_ERR_NONE) { goto EXIT; }

        fnFIE_free_object(himg_temp);
        himg_temp = NULL;

    }

    //入力画像スタック作成
    {
        imgstack = fnFIE_imgstack_alloc(F_IMGSTACK_ROOT_MODE, TRUE);
        if (imgstack == NULL) {
            status = F_ERR_NOMEMORY;
            goto EXIT;
        }

        for (i = 0; i < img_num; i++) {

            status = fnFIE_load_img_file(file_names[i], &himg_temp, F_COLOR_IMG_TYPE_UC8);
            if (status != F_ERR_NONE) { goto EXIT; }

            status = fnFIE_imgstack_push_back(imgstack, himg_temp);
            if (status != F_ERR_NONE) { goto EXIT; }
            fnFIE_free_object(himg_temp);
            himg_temp = NULL;

        }
    }

    //出力画像準備
    {
        width = width_temp;
        height = height_temp;
        dst_ch = ch_temp;
        dst_type = F_IMG_UC8;

        hdst = fnFIE_img_root_alloc(dst_type, dst_ch, width, height);
        if (hdst == NULL) {
            status = F_ERR_NOMEMORY;
            goto EXIT;
        }
    }

    //Mertens法実行
    {
        py_level = -1;//デフォルト

        status = fnFIE_hdr_mertens(imgstack, hdst, py_level);
        if (status != F_ERR_NONE) { goto EXIT; }

        //Mertensではtonemapping不要
        //結果画像保存
        status = fnFIE_save_png("hdst_mertens.png", hdst, -1);
        if (status != F_ERR_NONE) { goto EXIT; }
    }

EXIT:
    fnFIE_free_object(imgstack);
    fnFIE_free_object(hdst);
    fnFIE_free_object(himg_temp);

    return status;
}

INT main()
{
    INT status = F_ERR_UNKNOWN;

    // FIEライブラリのセットアップ
    fnFIE_setup();

    // HDR:linear_crf + hood
    status = do_hdr_linear_hood();

    // HDR:robertson + hood
    //status = do_hdr_robertson_hood();

    // HDR:mertens
    //status = do_hdr_mertens();

    // ライブラリの終了処理
    fnFIE_teardown();

    return status;
}

入出力画像

fie_hdr_sample_img_01.png

入力画像1枚目

fie_hdr_sample_img_06.png

入力画像2枚目

fie_hdr_sample_img_15.png

入力画像3枚目

fie_hdr_mertens_pylevel10.png

出力画像（Mertens法）

fie_hdr_linear_hood35.png

出力画像（liner_crf,tonemappingはhood）

fie_hdr_robertson_hood35.png

出力画像（Robertson,tonemappingはhood）

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