C++ Image::modifyImage方法代码示例

int AlgorithmShiftNoise::DoYourJob(Magick::Image& image)
{
    srand(time(NULL));

    image.modifyImage();
    Magick::Pixels pixelCache(image);

    Magick::PixelPacket* pixels=pixelCache.get(0,0,image.columns(), image.rows());

    for (int fromX=0; fromX<image.columns(); fromX++)
        for(int fromY=0; fromY<image.rows(); fromY++)
        {
            int luck=rand()%100;
            if (luck>Percent)
                continue;

            int toX=rand()%image.columns();
            int toY=rand()%image.rows();

            Magick::PixelPacket tmp=pixels[fromX+fromY*image.columns()];
            pixels[fromX+fromY*image.columns()]=pixels[toX+toY*image.columns()];
            pixels[toX+toY*image.columns()]=tmp;
        }

    pixelCache.sync();

    return 0;
}

int DetailedAlgorithm::DoYourJob(Magick::Image& image)
{
  image.modifyImage();
  Magick::Pixels pixelCache(image);
  for(int x=0;x<image.columns();x++)
    for(int y=0;y<image.rows();y++)
      OperationPerPixel(pixelCache.get(x,y,1,1),x,y);
  pixelCache.sync();
  return 0;
}

/*----------------------------------------------------------------------------
 Reads image data from a file into the raw data with dimensions
----------------------------------------------------------------------------*/
void read_img( string filename, Magick::Blob &blob, int &width, int &height )
{
    Magick::Image *magick;  /* ImageMagick object */

    /* load the file into an ImageMagick object */
    magick = new Magick::Image( filename.c_str() );

    /* get image dimensions from ImageMagick */
    width = magick->columns();
    height = magick->rows();

    /* convert image to grayscale, 8-bit depth and get raw data */
    magick->modifyImage();
    magick->write( &blob, "GRAY", 8 );

    /* enough magick for now */
    delete magick;
}

void scan_image (const char *filename)
{
    scanner.reset();
    // normally scanner would reset associated decoder,
    // but this debug program connects them manually
    // (to make intermediate state more readily available)
    // so decoder must also be reset manually
    decoder.reset();

    Magick::Image image;
    image.read(filename);
    string file = image.baseFilename();
    size_t baseidx = file.rfind('/');
    if(baseidx != string::npos)
        file = file.substr(baseidx + 1, file.length() - baseidx - 1);
    ofstream svg((file + ".svg").c_str());

    unsigned inwidth = image.columns();
    unsigned flush1 = inwidth / 32;
    unsigned flush0 = 2;
    unsigned width = inwidth + flush1 + flush0;
    unsigned height = image.rows();
    unsigned midy = (height + 1) / 2 + 2;
    image.crop(Magick::Geometry(inwidth, 1, 0, midy));
    image.size(Magick::Geometry(width, 1, 0, 0));

    svg << "<?xml version='1.0'?>" << endl
        << "<!DOCTYPE svg PUBLIC '-//W3C//DTD SVG 1.1//EN'"
        << " 'http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd'>" << endl
        << "<svg version='1.1' id='top'"
        << " width='10in' height='6in' preserveAspectRatio='xMinYMid slice'"
        << " overflow='visible' viewBox='0,0 " << width * 2 << ",384'"
        << " xmlns:xlink='http://www.w3.org/1999/xlink'"
        << " xmlns='http://www.w3.org/2000/svg'>" << endl
        << "<defs><style type='text/css'><![CDATA[" << endl
        << "  * { stroke-linejoin: round; stroke-linecap: round;"
        <<      " stroke-width: .1; text-anchor: middle;"
        <<      " image-rendering: optimizeSpeed;"
        <<      " font-size: 6; font-weight: bold }" << endl
        << "  path { fill: none }" << endl
        << "  #zero { stroke: #00f }" << endl
        << "  #edges { stroke: #f00 }" << endl
        << "  #cur-edge { stroke: #f44 }" << endl
        << "  #raw { stroke: orange }" << endl
        << "  #y0 { stroke: yellow }" << endl
        << "  #y1 { stroke: #0c0 }" << endl
        << "  #y2 { stroke: #0aa }" << endl
        << "  .y1thr { stroke: #f0f }" << endl
        << "  rect.bar { fill: black }" << endl
        << "  text.bar { fill: white }" << endl
        << "  rect.space { fill: white }" << endl
        << "  text.space { fill: black }" << endl
        << "  text.data { fill: #44f; font-size: 16 }" << endl
        << "]]></style></defs>" << endl
        << "<image width='" << width * 2 << "' height='384'"
        << " preserveAspectRatio='none'"
        << " xlink:href='" << file << ".png'/>" << endl
        << "<g transform='translate(1,384) scale(2,-.5)'>" << endl;

    // brute force
    unsigned raw[width];
    {
        // extract scan from image pixels
        image.modifyImage();
        Magick::Pixels view(image);
        Magick::PixelPacket *pxp = view.get(0, 0, width, 1);
        Magick::ColorYUV y;
        double max = 0;
        svg << "<path id='raw' d='M";
        unsigned i;
        for(i = 0; i < inwidth; i++, pxp++) {
            y = *pxp;
            if(max < y.y())
                max = y.y();
            raw[i] = (unsigned)(y.y() * 0x100);
            svg << ((i != 1) ? " " : " L ") << i << "," << raw[i];
            y.u(0);
            y.v(0);
            *pxp = y;
        }
        y.y(max); /* flush scan FIXME? */
        for(; i < inwidth + flush1; i++) {
            raw[i] = (unsigned)(y.y() * 0x100);
            svg << " " << i << "," << raw[i];
            *pxp++ = y;
        }
        y.y(0);
        for(; i < width; i++) {
            raw[i] = (unsigned)(y.y() * 0x100);
            svg << " " << i << "," << raw[i];
            *pxp++ = y;
        }
        view.sync();
        svg << "'/>" << endl
            << "</g>" << endl;
    }
    image.depth(8);
    image.write(file + ".png");

    // process scan and capture calculated values
//.........这里部分代码省略.........