Convert png image to jpg C#

Question

Convert png image to jpg C#

Hello. There is an image in png format. How to convert it to jpg / jpeg correctly ? I do it like this:

Image bmp = new Bitmap(path); //путь к картинке
bmp.Save(filename, ImageFormat.Jpeg);

But for some reason it seems to me that this is too simple and in which case my conversion will be "crooked"...

5

c#изображения png конвертация jpeg

Author: FaNaT_96, 2016-12-27

Source

2 answers

score 3 · Answer 1

In general, you do everything like this, only you could add another compression ratio.

Bitmap bmp1 = new Bitmap(@"c:\TestPhoto.jpg");
ImageCodecInfo jgpEncoder = GetEncoder(ImageFormat.Jpeg);

System.Drawing.Imaging.Encoder myEncoder =
    System.Drawing.Imaging.Encoder.Quality;

EncoderParameters myEncoderParameters = new EncoderParameters(1);

myEncoderParameter = new EncoderParameter(myEncoder, 100L);//100L - сжатие. Можно выставить 0L
myEncoderParameters.Param[0] = myEncoderParameter;
bmp1.Save(@"c:\TestPhotoQualityHundred.jpg", jgpEncoder, 
    myEncoderParameters);

score 1 · Answer 2

 class Program
 {
    static void Main(string[] args)
    {
    // Загружаем картинку.
    System.Drawing.Image image1 = System.Drawing.Image.FromFile(path);

    //Сохраняем в JPEG .
    image1.Save(@"C:\image_xxx.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);              
    }
}