Image Rendering Pure Quality

[philcajurao]

Im creating an app for a Photoshoot Studio and currently stuck into this problem. I cant render the exact/original quality for the Preview area. I already did all the settings for it to be as pure as I can but still cant reach the maximum quality. I only think the BEST quality for now and disregarding any heavy processing. Anyone know how to do this right?

`// Source - https://stackoverflow.com/q/79839833
// Posted by Hilai, modified by community. See post 'Timeline' for change history
// Retrieved 2025-12-07, License - CC BY-SA 4.0

    <!-- Image Display Grid (Always Visible) -->
    <Grid Grid.Row="1" RowDefinitions="*, Auto">
        <TextBlock Grid.Row="0" Text="Select a photo to preview" FontSize="12" Foreground="#d3d3d3" 
                   HorizontalAlignment="Center" VerticalAlignment="Center" IsVisible="{Binding PreviewImage, 
                   Converter={x:Static ObjectConverters.IsNull}}"/>
        <!-- WRAPPED IN BORDER FOR COLOR ACCURACY -->
        <Border Grid.Row="0" Background="Black" CornerRadius="4" ClipToBounds="True" 
                IsVisible="{Binding PreviewImage, Converter={x:Static ObjectConverters.IsNotNull}}">
             <Image Source="{Binding PreviewImage.Bitmap}" 
                   UseLayoutRounding="True"
                   RenderOptions.BitmapInterpolationMode="HighQuality"/>
        </Border>
        <TextBlock Grid.Row="1" Text="{Binding PreviewImage.FileName}" Foreground="#f0f0f0" FontSize="12" 
                   FontWeight="Bold" HorizontalAlignment="Center" IsVisible="{Binding PreviewImage, 
                   Converter={x:Static ObjectConverters.IsNotNull}}"/>
    </Grid>
</Grid>

`

[LaurentInSeattle]

When an image is resized, there is always some loss in quality.

[LaurentInSeattle]

Decode the JPEG to its original size and place it in an Image control sized to the same dimensions.

For smarter resizing than what Avalonia and Skia are providing, you will need advanced algorithms. See ImageMagic and OpenCv can do. Once resized, place it in an Image control sized to the new dimensions.

HTH

[LaurentInSeattle]

Off topic but... Quite strange that a pro photographer could be using JPEGs...

[philcajurao]

It’s okay, I really need any kind of ideas. I’ll look into it, thanks.

[LaurentInSeattle]

Also.. After a resize, a pass of "Clahe" usually brings back some 'crispiness' to the image.

[LaurentInSeattle]

And one more: Should you need to resize, do it in LAB color space for much better results.