c＃中的图像处理 [英] image manipulation in c#

问题描述

我在一个项目中工作，我已经进行了图像处理工作，当图像上传到我的软件时，它必须要求新的图像高度，宽度以及它的大小（以kb为单位）。当我给出这个数据时，软件转换图像并制作具有给定高度，宽度和尺寸的新图像（尺寸小于给定尺寸）。



i必须设置三图像属性。



1.身高

2.宽度

3.尺寸

I work on one project in which i have do image manipulation means when image upload to my software it have to ask for new image height,width and as well as it size in kb . when i gave this data that software convert image and make new image with given height,width and it size (size is less than given size).

i have to set three image attributes.

1. height
2. Width
3. It size

public Image resizeImage(int newWidth, int newHeight, string stPhotoPath)
 {
     Image imgPhoto = Image.FromFile(stPhotoPath); 

     int sourceWidth = imgPhoto.Width;
     int sourceHeight = imgPhoto.Height;

     //Consider vertical pics
    if (sourceWidth < sourceHeight)
    {
        int buff = newWidth;

        newWidth = newHeight;
        newHeight = buff;
    }

    int sourceX = 0, sourceY = 0, destX = 0, destY = 0;
    float nPercent = 0, nPercentW = 0, nPercentH = 0;

    nPercentW = ((float)newWidth / (float)sourceWidth);
    nPercentH = ((float)newHeight / (float)sourceHeight);
    if (nPercentH < nPercentW)
    {
        nPercent = nPercentH;
        destX = System.Convert.ToInt16((newWidth -
                  (sourceWidth * nPercent)) / 2);
    }
    else
    {
        nPercent = nPercentW;
        destY = System.Convert.ToInt16((newHeight -
                  (sourceHeight * nPercent)) / 2);
    }

    int destWidth = (int)(sourceWidth * nPercent);
    int destHeight = (int)(sourceHeight * nPercent);


  Bitmap bmPhoto = new Bitmap(newWidth, newHeight,
                  PixelFormat.Format24bppRgb);

    bmPhoto.SetResolution(imgPhoto.HorizontalResolution,
                 imgPhoto.VerticalResolution);

    Graphics grPhoto = Graphics.FromImage(bmPhoto);
    grPhoto.Clear(Color.Black);
    grPhoto.InterpolationMode =
        InterpolationMode.HighQualityBicubic;

    grPhoto.DrawImage(imgPhoto,
        new Rectangle(destX, destY, destWidth, destHeight),
        new Rectangle(sourceX, sourceY, sourceWidth, sourceHeight),
        GraphicsUnit.Pixel);

    grPhoto.Dispose();
    imgPhoto.Dispose();
    return bmPhoto;
}

i尝试此表单调整图像大小C＃ [ ^ ]

推荐答案

最好使用重新取样。为此，您可以链接到OpenCV（更准确地说是 Emgu CV [ ^ ]）例如： http://docs.opencv.org/modules/imgproc/doc/geometric_transformations.html [ ^ ]

You better use resampling. And for that, you can link to OpenCV (more precisely Emgu CV[^]) for example: http://docs.opencv.org/modules/imgproc/doc/geometric_transformations.html[^]

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