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C++ CByteImage::ReAllocate方法代码示例

本文整理汇总了C++中CByteImage::ReAllocate方法的典型用法代码示例。如果您正苦于以下问题:C++ CByteImage::ReAllocate方法的具体用法?C++ CByteImage::ReAllocate怎么用?C++ CByteImage::ReAllocate使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在CByteImage的用法示例。


在下文中一共展示了CByteImage::ReAllocate方法的7个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: float2color

// convert float disparity image into a color image using jet colormap
void float2color(CFloatImage fimg, CByteImage &img, float dmin, float dmax)
{
    CShape sh = fimg.Shape();
    int width = sh.width, height = sh.height;
    sh.nBands = 3;
    img.ReAllocate(sh);

    float scale = 1.0 / (dmax - dmin);

    for (int y = 0; y < height; y++) {
    for (int x = 0; x < width; x++) {
        float f = fimg.Pixel(x, y, 0);
        int r = 0;
        int g = 0;
        int b = 0;
        
        if (f != INFINITY) {
        float val = scale * (f - dmin);
        jet(val, r, g, b);
        }

        img.Pixel(x, y, 0) = b;
        img.Pixel(x, y, 1) = g;
        img.Pixel(x, y, 2) = r;
    }
    }
}
开发者ID:mzhang94,项目名称:stereo,代码行数:28,代码来源:pfm2png.cpp

示例2: getDisparities

void getDisparities(MRF *mrf, int width, int height, CByteImage &disp)
{
    CShape sh(width, height, 1);
    disp.ReAllocate(sh);

    int n = 0;
    for (int y = 0; y < height; y++) {
    uchar *row = &disp.Pixel(0, y, 0);
    for (int x = 0; x < width; x++) {
        row[x] = mrf->getLabel(n++);
    }
    }
}
开发者ID:clusty,项目名称:vision,代码行数:13,代码来源:mrfstereo.cpp

示例3: MotionToColor

void MotionToColor(CFloatImage motim, CByteImage &colim, float maxmotion)
{
    CShape sh = motim.Shape();
    int width = sh.width, height = sh.height;
    colim.ReAllocate(CShape(width, height, 3));
    int x, y;
    // determine motion range:
    float maxx = -999, maxy = -999;
    float minx =  999, miny =  999;
    float maxrad = -1;
    for (y = 0; y < height; y++) {
    for (x = 0; x < width; x++) {
        float fx = motim.Pixel(x, y, 0);
        float fy = motim.Pixel(x, y, 1);
        if (unknown_flow(fx, fy))
        continue;
        maxx = __max(maxx, fx);
        maxy = __max(maxy, fy);
        minx = __min(minx, fx);
        miny = __min(miny, fy);
        float rad = sqrt(fx * fx + fy * fy);
        maxrad = __max(maxrad, rad);
    }
    }
    printf("max motion: %.4f  motion range: u = %.3f .. %.3f;  v = %.3f .. %.3f\n",
       maxrad, minx, maxx, miny, maxy);


    if (maxmotion > 0) // i.e., specified on commandline
    maxrad = maxmotion;

    if (maxrad == 0) // if flow == 0 everywhere
    maxrad = 1;

    if (verbose)
    fprintf(stderr, "normalizing by %g\n", maxrad);

    for (y = 0; y < height; y++) {
    for (x = 0; x < width; x++) {
        float fx = motim.Pixel(x, y, 0);
        float fy = motim.Pixel(x, y, 1);
        uchar *pix = &colim.Pixel(x, y, 0);
        if (unknown_flow(fx, fy)) {
        pix[0] = pix[1] = pix[2] = 0;
        } else {
        computeColor(fx/maxrad, fy/maxrad, pix);
        }
    }
    }
}
开发者ID:angusforbes,项目名称:optiflow,代码行数:50,代码来源:color_flow.cpp

示例4: WTA

void WTA(MRF::CostVal *dsi, int width, int height, int nD, CByteImage &disp)
{
    CShape sh(width, height, 1);
    disp.ReAllocate(sh);
    int n = 0;
    for (int y = 0; y < height; y++) {
    uchar *row = &disp.Pixel(0, y, 0);
    for (int x = 0; x < width; x++) {
        int minval = dsi[n++]; // dsi(x,y,0)
        int mind = 0;
        for (int d = 1; d < nD; d++) {
        int val = dsi[n++]; // dsi(x,y,d)
        if (val < minval) {
            minval = val;
            mind = d;
        }
        }
        row[x] = mind;
    }
    }
}
开发者ID:ccppjava,项目名称:random-codes,代码行数:21,代码来源:binary.cpp

示例5: makeNonoccMask

void makeNonoccMask(CFloatImage disp0, CFloatImage disp0y, CFloatImage disp1,
            int dir, float thresh, CByteImage &mask)
{
    CShape sh = disp0.Shape();
    int width = sh.width, height = sh.height;

    if (sh != disp1.Shape())
    throw CError("shapes differ");

    int ydisps = (sh == disp0y.Shape());

    mask.ReAllocate(sh);
    mask.ClearPixels();
    int x, y;
    for (y = 0; y < height; y++) {
    for (x = 0; x < width; x++) {
        float dx = disp0.Pixel(x, y, 0);
        float dy = (ydisps ? disp0y.Pixel(x, y, 0) : 0.0);
        if (dx == INFINITY) // unknown
        continue;
        mask.Pixel(x, y, 0) = 128; // occluded

        // find nonocc
        int x1 = (int)round(x + dir * dx);
        int y1 = (int)round(y + dy);
        if (x1 < 0 || x1 >= width || y1 < 0 || y1 >= height)
        continue;
        float dx1 = disp1.Pixel(x1, y1, 0);

        float diff = dx - dx1;
        if (fabs(diff) > thresh)
        continue; // fails cross checking -- occluded

        mask.Pixel(x, y, 0) = 255; // cross-checking OK
    }
    }
}
开发者ID:mzhang94,项目名称:stereo,代码行数:37,代码来源:computemask.cpp

示例6: ReadFileTGA

void ReadFileTGA(CByteImage& img, const char* filename)
{
    // Open the file and read the header
    FILE *stream = fopen(filename, "rb");
    if (stream == 0)
        throw CError("ReadFileTGA: could not open %s", filename);
    CTargaHead h;
    if (fread(&h, sizeof(CTargaHead), 1, stream) != 1)
        throw CError("ReadFileTGA(%s): file is too short", filename);

    // Throw away the image descriptor
    if (h.idLength > 0)
    {
        char* tmp = new char[h.idLength];
        int nread = fread(tmp, sizeof(uchar), h.idLength, stream);
        delete tmp;   // throw away this data
        if (nread != h.idLength)
            throw CError("ReadFileTGA(%s): file is too short", filename);
    }
    bool isRun = (h.imageType & 8) != 0;
    bool reverseRows = (h.descriptor & TargaScreenOrigin) != 0;
    int fileBytes = (h.pixelSize + 7) / 8;

    // Read the colormap
    uchar colormap[TargaCMapSize][TargaCMapBands];
    int cMapSize = 0;
    bool grayRamp = false;
    if (h.colorMapType == 1)
    {
        cMapSize = (h.cMapLength[1] << 8) + h.cMapLength[0];
        if (h.cMapBits != 24)
            throw CError("ReadFileTGA(%s): only 24-bit colormap currently supported", filename);
        int l = fileBytes * cMapSize;
        if (l > TargaCMapSize * TargaCMapBands)
            throw CError("ReadFileTGA(%s): colormap is too large", filename);
        if (fread(colormap, sizeof(uchar), l, stream) != l)
            throw CError("ReadFileTGA(%s): could not read the colormap", filename);

        // Check if it's just a standard gray ramp
    int i;
        for (i = 0; i < cMapSize; i++) {
            for (int j = 0; j < TargaCMapBands; j++)
                if (colormap[i][j] != i)
                    break;
        }
        grayRamp = (i == cMapSize);    // didn't break out too soon
    }
    bool isGray = 
        h.imageType == TargaRawBW || h.imageType == TargaRunBW ||
        grayRamp &&
        (h.imageType == TargaRawColormap || h.imageType == TargaRunColormap);
    bool isRaw = h.imageType == TargaRawBW || h.imageType == TargaRawRGB ||
        h.imageType == TargaRawRGB && isGray;

    // Determine the image shape
    CShape sh(h.width, h.height, (isGray) ? 1 : 4);
    
    // Allocate the image if necessary
    img.ReAllocate(sh, false);

    // Construct a run-length code reader
    CTargaRLC rlc(! isRaw);

    // Read in the rows
    for (int y = 0; y < sh.height; y++)
    {
        int yr = reverseRows ? sh.height-1-y : y;
        uchar* ptr = (uchar *) img.PixelAddress(0, yr, 0);
        if (fileBytes == sh.nBands && isRaw)
        {
            // Special case for raw image, same as destination
            int n = sh.width*sh.nBands;
    	    if (fread(ptr, sizeof(uchar), n, stream) != n)
    	        throw CError("ReadFileTGA(%s): file is too short", filename);
        }
        else
        {
            // Read one pixel at a time
            for (int x = 0; x < sh.width; x++, ptr += sh.nBands)
            {
                uchar* buf = rlc.getBytes(fileBytes, stream);
                if (fileBytes == 1 && sh.nBands == 1)
                {
                    ptr[0] = buf[0];
                }
                else if (fileBytes == 1 && sh.nBands == 4)
                {
                    for (int i = 0; i < 3; i++)
                        ptr[i] = (isGray) ? buf[0] : colormap[buf[0]][i];
                    ptr[3] = 255;   // full alpha;
                }
                else if ((fileBytes == 3 || fileBytes == 4) && sh.nBands == 4)
                {
                    int i;
                    for (i = 0; i < fileBytes; i++)
                        ptr[i] = buf[i];
                    if (i == 3) // missing alpha channel
                        ptr[3] = 255;   // full alpha;
                }
                else
//.........这里部分代码省略.........
开发者ID:Nikash,项目名称:cs5670proj4,代码行数:101,代码来源:FileIO.cpp

示例7: ReadFilePNG


//.........这里部分代码省略.........

    // get rid of lower-order byte in 16-bit images
    // TODO: could allow this and read in IntImage in this case...
    if (bits == 16)
        png_set_strip_16(png_ptr);

    // change palette color into RGB
    if (colorType == PNG_COLOR_TYPE_PALETTE)
        png_set_expand(png_ptr);

    // want at least 8 bits
    if (bits < 8)
        png_set_expand(png_ptr);

    // if there is a transparent palette entry, create alpha channel
    if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))
        png_set_expand(png_ptr);

    // make gray images with alpha channel into RGBA -- TODO: or just ignore alpha?
    if (colorType == PNG_COLOR_TYPE_GRAY_ALPHA)
        // colorType == PNG_COLOR_TYPE_GRAY       // but leave gray images alone
        png_set_gray_to_rgb(png_ptr);

    // set the background color to draw transparent and alpha images over.
    // only needed for gray images with alpha 
    if (colorType == PNG_COLOR_TYPE_GRAY_ALPHA ||
        colorType == PNG_COLOR_TYPE_GRAY) {
        png_color_16 *pBackground;
        if (png_get_bKGD(png_ptr, info_ptr, &pBackground))
            png_set_background(png_ptr, pBackground, PNG_BACKGROUND_GAMMA_FILE, 1, 1.0);
        }

    // if required set gamma conversion
    // this seems to cause problems, so let's just leave gamma alone.
    //double gamma;
    //if (png_get_gAMA(png_ptr, info_ptr, &gamma)) {
    // //fprintf(stderr, "\n reading gamma %lf\n", gamma);
    //png_set_gamma(png_ptr, 1.0, gamma);
    //}

    // we need colors in BGR order, not RGB
    png_set_bgr(png_ptr);

    // always convert 3-band to 4-band images (add alpha):
    if (colorType == PNG_COLOR_TYPE_RGB)
        png_set_add_alpha(png_ptr, 255, PNG_FILLER_AFTER);

    // after the transformations have been registered update info_ptr data
    png_read_update_info(png_ptr, info_ptr);

    // get again width, height and the new bit-depth and color-type

    png_get_IHDR(png_ptr, info_ptr, 
             &pwidth, &pheight,
             //(png_uint_32 *)&width, (png_uint_32 *)&height,
             &bits, &colorType, NULL, NULL, NULL);
    
    width = pwidth;
    height = pheight;

    nBands = (int)png_get_channels(png_ptr, info_ptr);

    if (DEBUG_ImageIOpng)
    fprintf(stderr, "  -> w=%d, h=%d, %2d bits, %s, nB=%d\n",
        width, height, bits,
        colorType == PNG_COLOR_TYPE_GRAY ? "gray" :
        colorType == PNG_COLOR_TYPE_PALETTE ? "plt " :
        colorType == PNG_COLOR_TYPE_RGB ? "rgb " :
        colorType == PNG_COLOR_TYPE_RGB_ALPHA ? "rgba" :
        colorType == PNG_COLOR_TYPE_GRAY_ALPHA ? "gr-a" : "??? ",
        nBands);
    

    if (! (nBands==1 || nBands==3 || nBands==4)) {
        fclose(stream);
        throw CError("ReadFilePNG: Can't handle nBands=%d", nBands);
    }

    // Set the image shape
    CShape sh(width, height, nBands);

    // Allocate the image if necessary
    img.ReAllocate(sh);

    //  allocate a vector of row pointers
    std::vector<uchar *> rowPtrs;
    rowPtrs.resize(height);
    for (int y = 0; y<height; y++)
        rowPtrs[y] = &img.Pixel(0, y, 0);

    // read the whole image
    png_read_image(png_ptr, &rowPtrs[0]);

 	// read the additional chunks in the PNG file (not really needed)
    png_read_end(png_ptr, NULL);

    png_destroy_read_struct(&png_ptr, &info_ptr, NULL);

    fclose(stream);
}
开发者ID:TPeterW,项目名称:Ascii-Art,代码行数:101,代码来源:ImageIOpng.cpp


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