图像分割成几部分 [英] Divide Image into parts

问题描述

我已经存储到SD卡中的图像。 我想将图像划分为16等份。 如何使用位图办呢？

解决方案

 公共类CropImageManipulator
{
    公共CropImageManipulator（）
    {
    }

    私人字符串_fileNameWithoutExtension;
    私人字符串_fileExtension;
    私人字符串_fileDirectory;

    公共无效裁剪（字符串inputImgPath，诠释cropWidth，INT cropHeight）
    {
        this._fileNameWithoutExtension = System.IO.Path.GetFileNameWithoutExtension（inputImgPath）;
        this._fileExtension = System.IO.Path.GetExtension（inputImgPath）;
        this._fileDirectory = System.IO.Path.GetDirectoryName（inputImgPath）;

        //装载分割图像
         图片inputImg = Image.FromFile（inputImgPath）;
        INT imgWidth = inputImg.Width;
        INT imgHeight = inputImg.Height;

        //划分多少小块
        INT widthCount =（int）的Math.Ceiling（（imgWidth * 1.00）/（cropWidth * 1.00））;
        INT heightCount =（int）的Math.Ceiling（（imgHeight * 1.00）/（cropHeight * 1.00））;
        ArrayList的areaList =新的ArrayList（）;

        INT I = 0;
        对于（INT IHEIGHT = 0; IHEIGHT＆LT; heightCount; IHEIGHT ++）
        {
            对于（INT iWidth = 0; iWidth＆LT; widthCount; iWidth ++）
            {
                INT pointX = iWidth * cropWidth;
                INT尖尖= IHEIGHT * cropHeight;
                INT areaWidth =（（pointX + cropWidth）＆GT; imgWidth）？ （imgWidth  -  pointX）：cropWidth;
                INT areaHeight =（（尖尖+ cropHeight）＆GT; imgHeight）？ （imgHeight  - 尖）：cropHeight;
                字符串s =的String.Format（{0} {1} {2} {3}，pointX，尖尖的，areaWidth，areaHeight）;

                矩形RECT =新的Rectangle（pointX，尖尖的，areaWidth，areaHeight）;
                areaList.Add（RECT）;
                我++;
            }
        }

        对于（INT ILOOP = 0; ILOOP＆LT; areaList.Count; ILOOP ++）
        {
            矩形RECT =（矩形）areaList [ILOOP]
            字符串文件名= this._fileDirectory +\\+ this._fileNameWithoutExtension +_+ iLoop.ToString（）+ this._fileExtension;
            位图newBmp =新位图（rect.Width，rect.Height，PixelFormat.Format24bppRgb）;
            图形newBmpGraphics = Graphics.FromImage（newBmp）;
            newBmpGraphics.DrawImage（inputImg，新的Rectangle（0,0，rect.Width，rect.Height），矩形，GraphicsUnit.Pixel）;
            newBmpGraphics.Save（）;
            开关（this._fileExtension.ToLower（））
            {
                案.JPG：
                案.JPEG：
                    newBmp.Save（文件名，ImageFormat.Jpeg）;
                    打破;
                案GIF：
                    newBmp.Save（文件名，ImageFormat.Gif）;
                    打破;
            }
        }
        inputImg.Dispose（）;
    }
}
 

I have images stored into sd card. I want to divide the image into sixteen equal parts. How to do it using bitmap?

解决方案

public class CropImageManipulator
{
    public CropImageManipulator()
    {
    }

    private string _fileNameWithoutExtension;
    private string _fileExtension;
    private string _fileDirectory;

    public void Cropping(string inputImgPath, int cropWidth, int cropHeight)
    {
        this._fileNameWithoutExtension = System.IO.Path.GetFileNameWithoutExtension(inputImgPath);
        this._fileExtension = System.IO.Path.GetExtension(inputImgPath);
        this._fileDirectory = System.IO.Path.GetDirectoryName(inputImgPath);

        //Load the image divided
         Image inputImg = Image.FromFile(inputImgPath);
        int imgWidth = inputImg.Width;
        int imgHeight = inputImg.Height;

        //Divide how many small blocks
        int widthCount = (int)Math.Ceiling((imgWidth * 1.00) / (cropWidth * 1.00));
        int heightCount = (int)Math.Ceiling((imgHeight * 1.00) / (cropHeight * 1.00));
        ArrayList areaList = new ArrayList();

        int i = 0;
        for (int iHeight = 0; iHeight < heightCount ; iHeight ++)
        {
            for (int iWidth = 0; iWidth < widthCount ; iWidth ++)
            {
                int pointX = iWidth * cropWidth;
                int pointY = iHeight * cropHeight;
                int areaWidth = ((pointX + cropWidth) > imgWidth) ? (imgWidth - pointX) : cropWidth;
                int areaHeight = ((pointY + cropHeight) > imgHeight) ? (imgHeight - pointY) : cropHeight;
                string s = string.Format("{0};{1};{2};{3}",pointX,pointY,areaWidth,areaHeight);

                Rectangle rect = new Rectangle(pointX,pointY,areaWidth,areaHeight);
                areaList.Add(rect);
                i ++;
            }
        }

        for (int iLoop = 0 ; iLoop < areaList.Count ; iLoop ++)
        {
            Rectangle rect = (Rectangle)areaList[iLoop];
            string fileName = this._fileDirectory + "\\" + this._fileNameWithoutExtension + "_" + iLoop.ToString() + this._fileExtension;
            Bitmap newBmp = new Bitmap(rect.Width,rect.Height,PixelFormat.Format24bppRgb);
            Graphics newBmpGraphics = Graphics.FromImage(newBmp);
            newBmpGraphics.DrawImage(inputImg,new Rectangle(0,0,rect.Width,rect.Height),rect,GraphicsUnit.Pixel);
            newBmpGraphics.Save();
            switch (this._fileExtension.ToLower())
            {
                case ".jpg":
                case ".jpeg":
                    newBmp.Save(fileName,ImageFormat.Jpeg);
                    break;
                case "gif":
                    newBmp.Save(fileName,ImageFormat.Gif);
                    break;
            }
        }
        inputImg.Dispose();
    }
}

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