將圖像分爲幾部分

Question

我將圖像存儲到SD卡中。 我想將圖像分成十六個相等的部分。 如何使用位圖來做到這一點？

Answer 1

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(); 
    } 
} 

Answer 2

給它一個嘗試財產以後這樣的：

DisplayMetrics dm = new DisplayMetrics(); 
getWindowManager().getDefaultDisplay().getMetrics(dm); 

final int width = dm.widthPixels; 
final int height = dm.heightPixels; 

final int pixelByCol = width/4; 
final int pixelByRow = height/4; 

List<Bitmap> bs = new ArrayList<Bitmap>(); 

Bitmap image = <your photo here> 

for (int i = 0; i < 4) { 
    for (int j = 0; j < 4) { 
     int startX = pixelByCol * i; 
     int startY = pixelByRow * j; 
     Bitmap b = Bitmap.createBitmap(image, startX, startY, pixelByCol, pixelByRow); 
     bs.add(b); 
    } 
} 

BS < - 你的位圖

Answer 3

我發現下面的代碼工作的greates。它將圖像分成9個部分。您可以使用此代碼將圖像分成16個部分。這是一個非常簡單的方法。

public Bitmap[] splitBitmap(Bitmap picture) 
{ 
Bitmap scaledBitmap = Bitmap.createScaledBitmap(picture, 240, 240, true); 
Bitmap[] imgs = new Bitmap[9]; 
imgs[0] = Bitmap.createBitmap(scaledBitmap, 0, 0, 80 , 80); 
imgs[1] = Bitmap.createBitmap(scaledBitmap, 80, 0, 80, 80); 
imgs[2] = Bitmap.createBitmap(scaledBitmap,160, 0, 80,80); 
imgs[3] = Bitmap.createBitmap(scaledBitmap, 0, 80, 80, 80); 
imgs[4] = Bitmap.createBitmap(scaledBitmap, 80, 80, 80,80); 
imgs[5] = Bitmap.createBitmap(scaledBitmap, 160, 80,80,80); 
imgs[6] = Bitmap.createBitmap(scaledBitmap, 0, 160, 80,80); 
imgs[7] = Bitmap.createBitmap(scaledBitmap, 80, 160,80,80); 
imgs[8] = Bitmap.createBitmap(scaledBitmap, 160,160,80,80); 
return imgs; 


} 

該函數採用原始位圖作爲參數，然後使用Bitmap.createScaledBitmap（圖片，240，240，TRUE）;我創建了一個尺寸爲240 x 240的縮放圖像，以將圖像分成相等的部分，我創建了一個3 x 3的網格，其中每個圖像的尺寸爲80 x 80.這可以根據您的需要進行更改，但是寬度應該保持爲240，因爲所有正常的Android手機屏幕都是240寬的。

所有位圖都存儲在位圖數組中，最後該函數將數組返回給調用函數。