Image Processing ..

[yazannumoor]

Hello devs ..

I'm studying a course of ImageProcessing in university, and i have chosen to make a presentation about windows phone imaging ..

I was trying to find an API to work on, but sadly i only found Nokia SDK which didnt work for me before .. i just want any API that reaches the image pixels so i can process them..
I'm not sure if i wrote the right code for Nokia SDK .. if someone have any experience with imaging >> i need your help

any ideas?

 

[yazannumoor]

Here is my test code for Nokia SDK

The processImage method is used to apply the filter on the image.

private async void processImage() { WriteableBitmap writeableBitmap = new WriteableBitmap((int)bitmapImage.PixelWidth, (int)bitmapImage.PixelHeight); try { using (var imageStream = new StreamImageSource(photoStream)) { // Applying the custom filter effect to the image stream using (var customEffect = new NegateFilter(imageStream)) { // Rendering the resulting image to a WriteableBitmap using (var renderer = new WriteableBitmapRenderer(customEffect, writeableBitmap)) { // Applying the WriteableBitmap to our xaml image control await renderer.RenderAsync(); imageGrid.Source = writeableBitmap; } } } } catch (Exception exc) { MessageBox.Show(exc.Message + exc.StackTrace, exc.Source, MessageBoxButton.OK); } }

This is the NegateFilter class:

namespace ImagingTest { class NegateFilter : CustomEffectBase { public NegateFilter(IImageProvider source) : base(source){} protected override void OnProcess(PixelRegion sourcePixelRegion, PixelRegion targetPixelRegion) { sourcePixelRegion.ForEachRow((index, width, pos) => { for (int x = 0; x < width; ++x, ++index) { targetPixelRegion.ImagePixels[index] = 255 - sourcePixelRegion.ImagePixels[index]; } }); } } }

when i run the application and apply the filter, this exception shows up :

Operation Is Not Valid Due To The Current State Of The Object.

if i remove the await keyword the exception will not be thrown, but i will not get my processed image

 

[yazannumoor]

Thx for help .. -_-

too much activity here

 

[Woknox]

Eehm, can you tell me exactly wat you really want to do step by step? (and forget the Nokia SDK for a moment) maybe the .Net framework libs allready has enough functionallity to work with.

 

[yazannumoor]

Eehm, can you tell me exactly wat you really want to do step by step? (and forget the Nokia SDK for a moment) maybe the .Net framework libs allready has enough functionallity to work with.

Hey,
I just want a WP library that is used for image processing, I found a package called WriteableBitmapEx, but is too slow.

Thx

 

[Woknox]

Here is another tool, but its not completely free, it has a trial so you can check the performance...

Is this the example you used for WriteableBitmapEx? What kind of filter are you processing on the image?

You can take a shot at developing the effects completely by yourself (see this and this) but maybe that's a bridge too far?

 

[yazannumoor]

Thank you