TECHNOLOGIES
FORUMS
JOBS
BOOKS
EVENTS
INTERVIEWS
Live
MORE
LEARN
Training
CAREER
MEMBERS
VIDEOS
NEWS
BLOGS
Sign Up
Login
No unread comment.
View All Comments
No unread message.
View All Messages
No unread notification.
View All Notifications
Answers
Post
An Article
A Blog
A News
A Video
An EBook
An Interview Question
Ask Question
Forums
Monthly Leaders
Forum guidelines
Arun E
NA
105
7.3k
Error while using trackbar to adjust brightness-C#
Sep 16 2016 1:55 AM
Hello Experts, I will be getting images into picturebox from two comboboxes dropdown(say 15-20images) by selecting specific folders.I want to adjust their brightness, so when i move the trackbar to adjust brightness the output window fades away and displays a error message.I am working with VS2013-winforms with C#. Thanks in advance,
I have tried with,
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
Bitmap newbitmap;
ArrayList alist = new ArrayList();
int i = 0;
int filelength = 0;
public Form1()
{
InitializeComponent();
} private void Form1_Load(object sender, EventArgs e)
{
DirectoryInfo di = new DirectoryInfo(@"C:\Users\Arun\Desktop\scanned");
DirectoryInfo[] folders = di.GetDirectories();
comboBox1.DataSource = folders;
}
private void button7_Click(object sender, EventArgs e)
{
if (i + 1 < filelength)
{
pictureBox1.Image = Image.FromFile(alist[i + 1].ToString());
i = i + 1;
pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
}
}
private void button8_Click(object sender, EventArgs e)
{
if (i - 1 >= 0)
{
pictureBox1.Image = Image.FromFile(alist[i - 1].ToString());
pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
i = i - 1;
}
}
private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
{
string selected = comboBox1.SelectedItem.ToString();
String fullpath = Path.Combine(@"C:\Users\Arun\Desktop\scanned", selected);
DirectoryInfo di1 = new DirectoryInfo(fullpath);
DirectoryInfo[] folders1 = di1.GetDirectories();
comboBox2.DataSource = folders1;
}
private void button9_Click(object sender, EventArgs e)
{
string selected1 = comboBox1.SelectedItem.ToString();
string selected2 = comboBox2.SelectedItem.ToString();
//Initially load all your image files into the array list when form load first time
System.IO.DirectoryInfo inputDir = new System.IO.DirectoryInfo(Path.Combine(@"C:\Users\Arun\Desktop\scanned", selected1, selected2)); //Source image folder path
try
{
if ((inputDir.Exists))
{
alist.Clear();
//Get Each files
System.IO.FileInfo file = null;
foreach (System.IO.FileInfo eachfile in inputDir.GetFiles())
{
file = eachfile;
if (file.Extension == ".tif")
{
alist.Add(file.FullName); //Add it in array list
//filelength = filelength + 1;
filelength = alist.Count;
}
else if(file.Extension == ".jpg")
{
alist.Add(file.FullName); //Add it in array list
// filelength = filelength + 1;
filelength = alist.Count;
}
}
pictureBox1.Image = Image.FromFile(alist[0].ToString()); //Display intially first image in picture box as sero index file path
pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
i = 0;
}
}
catch (Exception ex)
{
}
} private void trackBar1_Scroll(object sender, EventArgs e)
{
label2.Text = trackBar1.Value.ToString();
pictureBox1.Image = adjustbrightness (newbitmap, trackBar1.Value);
}
public static Bitmap adjustbrightness(Bitmap image,int value)
{
Bitmap tempbitmap = image;
float finalvalue = (float)value / 255.0f;
Bitmap newbitmap = new Bitmap(tempbitmap.Width, tempbitmap.Height);
Graphics newgraphics = Graphics.FromImage(newbitmap);
float[][] floatcolormatrix = {
new float[] {1,0,0,0,0},
new float[] {0,1,0,0,0},
new float[] {0,0,1,0,0},
new float[] {0,0,0,1,0},
new float[] {finalvalue,finalvalue,finalvalue,1,1}
};
ColorMatrix newcolormatrix = new ColorMatrix(floatcolormatrix);
ImageAttributes attributes = new ImageAttributes();
attributes.SetColorMatrix(newcolormatrix);
newgraphics.DrawImage(tempbitmap, new Rectangle(0, 0, tempbitmap.Width, tempbitmap.Height), 0, 0, tempbitmap.Width, tempbitmap.Height, GraphicsUnit.Pixel, attributes);
attributes.Dispose();
newgraphics.Dispose();
return newbitmap;
}
}
}
Reply
Answers (
2
)
how to get data 25 column of 100 column from datatable
How to automate SAP LOGON LITE application using CODED UI