public ArrayList <BufferedImage> splitImage(BufferedImage originalImage, int size)
{
ArrayList <BufferedImage> imgArray = new ArrayList <BufferedImage>();
for (int x = 0; x < originalImage.getWidth(); x += size)
{
for (int y = 0; y < originalImage.getHeight(); y += size)
{
imgArray.Add(originalImage.getSubimage(x, y, size, size));
}
}
return(imgArray);
}
/// <summary>
/// Crop the part of an image with a white rectangle
/// </summary>
/// <returns> A cropped image File </returns>
public virtual File crop(BufferedImage image)
{
// this will be coordinates of the upper left white pixel
int upperLeftCornerx = int.MaxValue;
int upperLeftCornery = int.MaxValue;
//this will be coordinates of the lower right white pixel
int lowerRightCornerx = int.MinValue;
int lowerRightCornery = int.MinValue;
//find the minimum and maximum white pixel coordinates
for (int i = 0; i < image.Width; i++)
{
for (int j = 0; j < image.Height; j++)
{
if (image.getRGB(i, j) == WHITE.RGB && (i < upperLeftCornerx && j < upperLeftCornery) || (i <= upperLeftCornerx && j < upperLeftCornery) || (i < upperLeftCornerx && j <= upperLeftCornery))
{
upperLeftCornerx = i;
upperLeftCornery = j;
}
if (image.getRGB(i, j) == WHITE.RGB && ((i > lowerRightCornerx && j >= lowerRightCornery) || (i >= lowerRightCornerx && j > lowerRightCornery) || (i > lowerRightCornerx && j >= lowerRightCornery)))
{
lowerRightCornerx = i;
lowerRightCornery = j;
}
}
}
//crop the image to the white rectangle size
BufferedImage croppedImage = image.getSubimage(upperLeftCornerx, upperLeftCornery, lowerRightCornerx - upperLeftCornerx, lowerRightCornery - upperLeftCornery);
//make a file from that cropped image
File cropFile = new File("croppedimage.png");
try
{
ImageIO.write(croppedImage, "png", cropFile);
}
catch (IOException ex)
{
//JAVA TO C# CONVERTER WARNING: The .NET Type.FullName property will not always yield results identical to the Java Class.getName method:
Logger.getLogger(typeof(OcrDemo).FullName).log(Level.SEVERE, null, ex);
}
return(cropFile);
}
/// <summary>
/// Crops (returns subimage) of specified input image at specified points.
/// </summary>
/// <param name="image"> image to crop </param>
/// <param name="x1"> top left x coordinate </param>
/// <param name="y1"> top left y coordinate </param>
/// <param name="x2"> bottom right x coordinate </param>
/// <param name="y2"> bottom right y coordinate
/// </param>
/// <returns> image croped at specified points </returns>
public static BufferedImage cropImage(BufferedImage image, int x1, int y1, int x2, int y2)
{
return(image.getSubimage(x1, y1, x2 - x1, y2 - y1));
}