private void FormGray_Load(object sender, EventArgs e)
{
// 灰階
try
{
pictureBox1.Image = pcxOrigin.pcxImg;
pcxAfter = new ImgPcx(pcxOrigin);
pcxAfter.Gray();
pictureBox2.Image = pcxAfter.pcxImg;
// 顯示SNR值 (到小數後2位)
textBox1.Text = pcxOrigin.GetSNR(pcxOrigin, pcxAfter).ToString("f2");
// 清除圖表資料
chart1.Series.Clear();
// 設定圖表的高度與圖片相同
chart1.Size = new Size(chart1.Width, pictureBox1.Image.Height);
// 繪製histogram
Bitmap origin = (Bitmap)pictureBox2.Image;
Bitmap target = origin.Clone(new Rectangle(0, 0, origin.Width, origin.Height), PixelFormat.Format24bppRgb);
int w = target.Width;
int h = target.Height;
double[] yValue1 = new double[256];
Array.Clear(yValue1, 0, yValue1.Length);
for (int x = 0; x < w; ++x)
{
for (int y = 0; y < h; ++y)
{
Color c = target.GetPixel(x, y);
int r = c.R;
int g = c.G;
int b = c.B;
++yValue1[r];
++yValue1[g];
++yValue1[b];
}
}
// 將點個數轉換為頻率
int total = w * h * 3;
for (int i = 0; i < 256; ++i)
{
yValue1[i] /= total;
}
// Range(start, cnt)
string[] xValue = Enumerable.Range(0, 256).ToArray().Select(x => x.ToString()).ToArray();
// 設定x軸區間
chart1.ChartAreas["ChartArea1"].AxisX.Interval = 32;
// Intensities - 強度
chart1.Series.Add("Intensities"); // 資料序列集合
chart1.Series["Intensities"].ChartType = SeriesChartType.Column; // 直方圖
chart1.Series["Intensities"].Points.DataBindXY(xValue, yValue1);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
// 加入浮水印
private void button3_Click(object sender, EventArgs e)
{
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.Title = "開啟圖檔";
openFileDialog.Filter = "pcx files (*.pcx)|*.pcx";
if (openFileDialog.ShowDialog() == DialogResult.OK && openFileDialog.FileName.Length > 0)
{
pcxMark = new ImgPcx(openFileDialog.FileName);
// 浮水印轉灰階
pcxMark.Gray();
pictureBox1.Image = null;
pictureBox2.Image = null;
pictureBox3.Image = null;
pictureBox4.Image = null;
pictureBox5.Image = null;
pictureBox6.Image = null;
pictureBox7.Image = null;
pictureBox8.Image = null;
markFlag = true;
}
else
{
// 還原
pcxGray = new ImgPcx(pcxBackup);
markFlag = false;
pictureBox1.Image = null;
pictureBox2.Image = null;
pictureBox3.Image = null;
pictureBox4.Image = null;
pictureBox5.Image = null;
pictureBox6.Image = null;
pictureBox7.Image = null;
pictureBox8.Image = null;
pictureBox10.Image = null;
label1.Text = "";
label2.Text = "";
// 隱藏SNR
label3.Visible = false;
textBox1.Visible = false;
}
}
// 讀檔
private void menuOpen_Click(object sender, EventArgs e)
{
try
{
// 清空顯示圖片與資訊
pictureBox1.Image = null;
pictureBox2.Image = null;
pictureBox3.Image = null;
dataGridView1.Visible = false;
labelXY.Text = "";
labelR.Text = "";
labelG.Text = "";
labelB.Text = "";
labelDim.Text = "";
chart1.Visible = false;
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.Title = "開啟圖檔";
openFileDialog.Filter = "pcx files (*.pcx)|*.pcx";
if (openFileDialog.ShowDialog() == DialogResult.OK && openFileDialog.FileName.Length > 0)
{
pcxOrigin = new ImgPcx(openFileDialog.FileName);
// test Save()
//pcx.Save("Sample_save");
// 將載入的圖像放到pictureBox1
pictureBox1.Image = pcxOrigin.pcxImg;
// 顯示圖像header資訊
string[,] info = pcxOrigin.GetInfo();
for (int i = 0; i < 16; ++i)
{
dataGridView1.Rows.Add(new object[] { info[i, 0], info[i, 1] });
}
dataGridView1.Visible = true;
// nPlanes = 3, 無調色盤
if (pcxOrigin.head.nPlanes == 1)
{
// 畫出調色盤
var colors = pcxOrigin.pcxImg.Palette.Entries; // 取得調色盤
int cntColors = colors.Count(); // 計算顏色總數 (ex: 256)
int row = cntColors / 16; // (ex: 256 / 16 = 16)
int column = cntColors / 16; // (ex: 256 / 16 = 16)
Bitmap palette = new Bitmap(row * 15, column * 15); // 建立調色盤圖像
Graphics g = Graphics.FromImage(palette); // 繪圖介面
/*
* @curX : 圖像x座標
* @curY : 圖像y座標
* @cnt : 計算此列已畫好的顏色數 (用來判斷何時換行)
*/
int curX = 0, curY = 0, cnt = 0;
for (int i = 0; i < cntColors; ++i)
{
// 挑出顏色給筆刷
SolidBrush brush = new SolidBrush(Color.FromArgb(colors[i].A, colors[i].R, colors[i].G, colors[i].B));
// 畫矩形
g.FillRectangle(brush, curX, curY, 15, 15);
++cnt;
if (cnt == row) // 換行繼續畫
{
curX = 0;
curY += 15;
cnt = 0;
}
else // 右移繼續畫
{
curX += 15;
}
}
// 顯示調色盤
pictureBox3.Image = palette;
}
// 顯示圖像長寬
labelDim.Text = pcxOrigin.head.width.ToString() + " x " + pcxOrigin.head.height.ToString();
// 開檔後, 開放使用存檔與工具
menuSave.Enabled = true;
menuTool.Enabled = true;
menuFilter.Enabled = true;
menuCoding.Enabled = true;
// 預先製作並保存灰階影像
pcxGray = new ImgPcx(pcxOrigin);
pcxGray.Gray();
// 清除圖表資料(可重複使用)
chart1.Series.Clear();
// 繪製histogram
Bitmap origin = (Bitmap)pictureBox1.Image;
Bitmap target = origin.Clone(new Rectangle(0, 0, origin.Width, origin.Height), PixelFormat.Format24bppRgb);
int w = target.Width;
int h = target.Height;
double[] yValue1 = new double[256];
double[] yValue2 = new double[256];
double[] yValue3 = new double[256];
Array.Clear(yValue1, 0, yValue1.Length);
Array.Clear(yValue2, 0, yValue2.Length);
Array.Clear(yValue3, 0, yValue3.Length);
for (int x = 0; x < w; ++x)
{
for (int y = 0; y < h; ++y)
{
Color c = target.GetPixel(x, y);
int r = c.R;
int g = c.G;
int b = c.B;
++yValue1[r];
++yValue2[g];
++yValue3[b];
}
}
// 將點個數轉換為頻率
int total = w * h * 3;
for (int i = 0; i < 256; ++i)
{
yValue1[i] /= total;
yValue2[i] /= total;
yValue3[i] /= total;
}
// Range(start, cnt)
string[] xValue = Enumerable.Range(0, 256).ToArray().Select(x => x.ToString()).ToArray();
// 設定x軸區間
chart1.ChartAreas["ChartArea1"].AxisX.Interval = 32;
chart1.Series.Add("R");
chart1.Series.Add("G");
chart1.Series.Add("B");
chart1.Series["R"].ChartType = SeriesChartType.Column;
chart1.Series["R"].Points.DataBindXY(xValue, yValue1);
chart1.Series["R"].Color = Color.FromArgb(150, Color.Red); // 半透明顏色
chart1.Series["G"].ChartType = SeriesChartType.Column;
chart1.Series["G"].Points.DataBindXY(xValue, yValue2);
chart1.Series["G"].Color = Color.FromArgb(150, Color.Green);
chart1.Series["B"].ChartType = SeriesChartType.Column;
chart1.Series["B"].Points.DataBindXY(xValue, yValue3);
chart1.Series["B"].Color = Color.FromArgb(150, Color.Blue);
chart1.Visible = true;
}
else
{
// 開檔失敗, 無法使用存檔與工具
menuSave.Enabled = false;
menuTool.Enabled = false;
menuFilter.Enabled = false;
menuCoding.Enabled = false;
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
