Question

我想比较两张图片，其中只有＆＃34;打印日期＆＃34;不同的是，我想裁剪＆＃39; date＆＃39;仅限地区。但我想显示没有裁剪区域的完整图像（不仅仅是裁剪区域）

我用于裁剪的代码

static void Main(string[] args)
    {
        Bitmap bmp = new Bitmap(@"C:\Users\Public\Pictures\Sample Pictures\1546.jpg");
        Rectangle rect = new Rectangle(0, 0, bmp.Width, bmp.Height);
        BitmapData rawOriginal = bmp.LockBits(new Rectangle(0, 0, bmp.Width, bmp.Height), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);

        int origByteCount = rawOriginal.Stride * rawOriginal.Height;
        byte[] origBytes = new Byte[origByteCount];
        System.Runtime.InteropServices.Marshal.Copy(rawOriginal.Scan0, origBytes, 0, origByteCount);

        //I want to crop a 100x100 section starting at 15, 15.
        int startX = 15;
        int startY = 15;
        int width = 100;
        int height = 100;
        int BPP = 4;        //4 Bpp = 32 bits, 3 = 24, etc.

        byte[] croppedBytes = new Byte[width * height * BPP];

        //Iterate the selected area of the original image, and the full area of the new image
        for (int i = 0; i < height; i++)
        {
            for (int j = 0; j < width * BPP; j += BPP)
            {
                int origIndex = (startX * rawOriginal.Stride) + (i * rawOriginal.Stride) + (startY * BPP) + (j);
                int croppedIndex = (i * width * BPP) + (j);

                //copy data: once for each channel
                for (int k = 0; k < BPP; k++)
                {
                    croppedBytes[croppedIndex + k] = origBytes[origIndex + k];
                }
            }
        }

        //copy new data into a bitmap
        Bitmap croppedBitmap = new Bitmap(width, height);
        BitmapData croppedData = croppedBitmap.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);
        System.Runtime.InteropServices.Marshal.Copy(croppedBytes, 0, croppedData.Scan0, croppedBytes.Length);

        bmp.UnlockBits(rawOriginal);
        croppedBitmap.UnlockBits(croppedData);

        croppedBitmap.Save(@"C:\Users\Public\Pictures\Sample Pictures\AFTERCROP_CROP.jpg");
        bmp.Save(@"C:\Users\Public\Pictures\Sample Pictures\AFTERCROP-ORIG.jpg");
    }

Answer 1

您的代码有点过于复杂，您似乎对裁剪的内容感到困惑 - 裁剪意味着占据原始图片的一部分。你似乎想要的是将原始图片的某些部分涂黑：

Blackout versus cropping

实现此目的的最简单方法是在原始图像上绘制一个简单的填充矩形：

var React = require('react'),
    Router = require('react-router');

var Searchbar = React.createClass({

  mixins : [Router.Navigation],

  searchTerm: function(e) {
    if (e.keyCode !== 13) {
      return;
    }

    this.context.router.transitionTo('/someRoute/search?term=' + e.currentTarget.value)
  },

  render: function() {
    return (
      <div className="searchbar-container">
        <input type="search" placeholder="Search..." onKeyDown={this.searchTerm} />
      </div>
    )
  }
});

module.exports = Searchbar;

如果您还想保留原始位图，可以将其复制过来。

显示完整图像，无需剪切零件C＃

1 个答案: