Compress size of image to 250kb using xamarin.forms without dependency service
Solution 1
It is a very complicated job since you would need a ton of knowledge about image processing.
Most importantly, re-inventing wheel is a bad move.
http://www.codeproject.com/Articles/83225/A-Simple-JPEG-Encoder-in-C
Take a look of the above code project which only tackles JPEG; not to say TIFF, GIF, BMP etc.
Image compression involves many complex mathematics transforms, like DCT and Huffman.
You will need a whole university semester to learn those basics.
On the other hand, wisely utilizing platform support, you can complete the task within a minute.
BitmapEncoder in Windows Phone.
FileStream stream = new FileStream("new.jpg", FileMode.Create);
JpegBitmapEncoder encoder = new JpegBitmapEncoder();
encoder.QualityLevel = 30;
encoder.Frames.Add(BitmapFrame.Create(image));
encoder.Save(stream);
Bitmap in Android
using (System.IO.Stream stream = System.IO.File.Create(targetFile))
{
bitmap.Compress(Bitmap.CompressFormat.Jpeg, 30, stream);
}
UIImage in iOS
NSData data = image.AsJPEG(0.3);
Bitmap in .NET framework
ImageCodecInfo[] codecs = ImageCodecInfo.GetImageDecoders();
ImageCodecInfo codec = codecs.First(t => t.FormatID == ImageFormat.Jpeg.Guid);
EncoderParameters parameters = new EncoderParameters(1);
parameters.Param[0] = new EncoderParameter(Encoder.Quality, 30L);
bitmap.Save("output.jpg", codec, parameters);
Solution 2
I also had this same problem. Please check here as I believe you will find the solution.
https://xamarincodes.com/2020/04/05/image-compression-in-xamarin-forms/
I used Xam.Plugin.Media – setting the compression quality to take photos and compress as well.
Here is a sample
private async void cmdCameraPhotograph_Clicked(object sender, EventArgs e)
{
if (CrossMedia.Current.IsTakePhotoSupported)
{
var file = await CrossMedia.Current.TakePhotoAsync(new StoreCameraMediaOptions
{
Directory = "Photographs",
SaveToAlbum = true,
CompressionQuality = 40,
CustomPhotoSize = 35,
PhotoSize = PhotoSize.MaxWidthHeight,
MaxWidthHeight = 2000,
DefaultCamera = CameraDevice.Rear
}).ConfigureAwait(true);
if (file != null)
{
}
}
else
{
await DisplayAlert("Not Supported", "Your device does not support this feature.", "OK. Understood")
.ConfigureAwait(true);
}
}
You can also get the file from the Gallery
var file = await CrossMedia.Current.PickPhotoAsync(new PickMediaOptions
{
CompressionQuality = 40,
CustomPhotoSize = 35,
PhotoSize = PhotoSize.MaxWidthHeight,
MaxWidthHeight = 2000
}).ConfigureAwait(true);
![Nawnit](https://i.stack.imgur.com/YNeyq.png?s=256&g=1)
Nawnit
Around 7.4+ years of experience in software development. Over 2+ years of hands on IT expertise priotizing CI/CD, Automation of configuration management, build/release management, Cloud Resource utilizations, etc. Experience in building native iOS and hybrid mobile application.
Updated on July 22, 2022Comments
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Nawnit almost 2 years
I'm trying to compress image taken from camera to 250kb size in Xamarin.Forms. I found ways to do that in dependency service but I want it without dependency service (pure xamarin.forms code). How could it possible. Can anyone suggest me best approaches you have?
Thanks in advance
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Karan Harsh Wardhan about 5 yearsjust fyi can't use that .net solution for xamarin since system.drawing is not included in xamarin bugzilla.xamarin.com/show_bug.cgi?id=53385
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Nitin Sawant almost 5 yearscan you post xamarin forms version?
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Ashaar almost 5 yearsYou can use dependency injuction with above paltform specific code