C# Image Content Modification and Save with input configurations

Question

3.00/5 (1 vote)

See more:

, +

Dear Experts, below is my code. I'm saving an image with add some contents to the image from DrawString. My problem is, once I saved the image, CMYK become RGB, image size is different, image dpi is different. Like that several input image configurations were changed.

I just want to keep the same input configuration and quality with modifying the content only. Please help me.

Bitmap bmp = new Bitmap(Image.FromFile(@"D:\input.jpg"));

Graphics gr = Graphics.FromImage(bmp);

using (Font myFont = new Font("Arial", 42))
{
gr.DrawString("Hello!", myFont, Brushes.Green, new Point(2, 2));
gr.DrawString(date.Text, myFont, Brushes.Black, new Point(700, 798));
gr.DrawString(shape.Text, myFont, Brushes.Black, new Point(700, 908));
gr.DrawString(meas.Text, myFont, Brushes.Black, new Point(700, 1031));
gr.DrawString(weight.Text, myFont, Brushes.Black, new Point(700, 1160));
}
ImageCodecInfo jgpEncoder = GetEncoder(ImageFormat.Jpeg);
System.Drawing.Imaging.Encoder myEncoder = System.Drawing.Imaging.Encoder.Quality;
EncoderParameters myEncoderParameters = new EncoderParameters(1);

EncoderParameter myEncoderParameter = new EncoderParameter(myEncoder, 300L);
myEncoderParameters.Param[0] = myEncoderParameter;
bmp.Save(@"D:\test.jpg", jgpEncoder, myEncoderParameters);

Posted 18-Jun-15 8:22am

abdulsafran

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Sergey Alexandrovich Kryukov · Answer 1 · 2015-06-18T09:32:00

This is weird, but, first of all, eliminate new Bitmap(Image). Use

C#

Bitmap bmp = new Bitmap(fileName);

And if you really wanted to initialize a bitmap from some abstract Image instance when a file is not accessible, and if you also wanted to change the size and PixelFormat, you would need to initialize an empty bitmap with required properties, and then open an instance of Image separately, and draw in on your bitmap, using the Graphics instance you would obtain exactly the way you already did (called gr in your code). In this particular case, you just don't need it, because you can open a bitmap directly from a file, which should preserver the pixel format, size and all other properties. Please see:
https://msdn.microsoft.com/en-us/library/system.drawing.bitmap%28v=vs.110%29.aspx[^],
https://msdn.microsoft.com/en-us/library/0cbhe98f(v=vs.110).aspx[^],
https://msdn.microsoft.com/en-us/library/system.drawing.graphics.drawimage%28v=vs.110%29.aspx[^].

—SA