private void load_image()
{
var fs = new FileStream(openFileDialog1.FileName, FileMode.Open, FileAccess.Read);
var buf = new byte[fs.Length];
fs.Read(buf, 0, buf.Length);
fs.Close();
var ms = new MemoryStream(buf);
var img = Image.FromStream(ms);
img = ImageProcess.ToGray(img);
int step = 1;
if (comboBox1.SelectedIndex > 0)
{
var img1 = ImageProcess.HorizontalGrayDeltafy(img, step);
var img2 = ImageProcess.VerticalGrayDeltafy(img, step);
img1 = ImageProcess.CropImage(img1, 0, 0, img1.Width, img1.Height - step);
img2 = ImageProcess.CropImage(img2, 0, 0, img2.Width - step, img2.Height);
img = ImageProcess.GrayAdd(img1, img2);
img = ImageProcess.ReverseGray(img);
}
if (checkBox1.Checked)
{
img = ImageProcess.ToBinary(img, (byte)((comboBox1.SelectedIndex > 0) ? 230 : 127));
}
pictureBox1.Image = img;
}
private void button2_Click(object sender, EventArgs e)
{
if (pictureBox2.Visible)
{
int crop_left = pictureBox2.Left;
int crop_top = pictureBox2.Top;
int crop_width = pictureBox2.Width;
int crop_height = pictureBox2.Height;
Debug.Print("Crop Rect: {{{0},{1},{2},{3}}}", crop_left, crop_top, crop_width, crop_height);
//计算原图片的坐标信息
//放缩比
double scale = Math.Min(pictureBox1.Width / (double)pictureBox1.Image.Width, pictureBox1.Height / (double)pictureBox1.Image.Height);
Debug.Print("scale ratio: {0}", scale);
//原图片左上角在屏幕的位置
int origin_left = (int)((pictureBox1.Width - pictureBox1.Image.Width * scale) / 2);
int origin_top = (int)((pictureBox1.Height - pictureBox1.Image.Height * scale) / 2);
int origin_width = (int)((pictureBox1.Image.Width * scale));
int origin_height = (int)((pictureBox1.Image.Height * scale));
Debug.Print("the original (background) image left top point at screen:({0},{1}), size:({2},{3})", origin_left, origin_top, origin_width, origin_height);
//二维码图片映射到原图的坐标
int mapped_left = (int)((crop_left - origin_left) / scale);
int mapped_top = (int)((crop_top - origin_top) / scale);
int mapped_width = (int)(crop_width / scale);
int mapped_height = (int)(crop_height / scale);
Debug.Print("Crop Rect Mapped to the original image: {{{0},{1},{2},{3}}}", mapped_left, mapped_top, mapped_width, mapped_height);
//裁剪原图
var cropped_image = ImageProcess.CropImage(pictureBox1.Image, mapped_left, mapped_top, mapped_width, mapped_height);
//缩放原图，匹配分辨率到二维码
Image resized_image = new Bitmap(cropped_image, pictureBox2.Image.Width, pictureBox2.Image.Height);
//平均灰度
if (checkBox2.Checked)
{
resized_image = ImageProcess.AverageGray(resized_image, 3, 3);
}
//二值化
if (checkBox1.Checked)
{
resized_image = ImageProcess.ToBinary(resized_image);
}
//绘图
var output_image = new Bitmap(resized_image.Width + 20, resized_image.Height + 20);
var gr = Graphics.FromImage(output_image);
gr.FillRectangle(Brushes.White, 0, 0, output_image.Width, output_image.Height);
gr.DrawImage(resized_image, 10, 10);
gr.DrawImage(pictureBox2.Image, 10, 10);
gr.Dispose();
//保存
if (saveFileDialog1.ShowDialog() == DialogResult.OK)
{
output_image.Save(saveFileDialog1.FileName, System.Drawing.Imaging.ImageFormat.Png);
}
}
}