Direct2D: Convert ID2D1Image to ID2D1Bitmap - c++

Question

I'm working on a programm that needs to modify what is already on the screen.
So I only have a ID2D1Bitmap that i created using pRenderTarget->CopyFromRenderTarget.
What I'm trying to do is, applying effects to that Bitmap. The effect only returns ID2D1Image, but i need to have a ID2D1Bitmap.
Is there a way to do this?
Edit1:
ID2D1Bitmap* myBitmap //the bitmap I want to apply the effect to
ID2D1Effect* effect = NULL;
pDeviceContext->CreateEffect(CLSID_D2D1Saturation, &effect);
effect->SetValue(D2D1_SATURATION_PROP_SATURATION, 0.0f);
effect->SetInput(0, myBitmap);
ID2D1Image* pImg = NULL;
effect->GetOutput(&pImg);
If I cast this Image, getPixelSize() raises an access violation.

Answer 1

I solved it. It's dirty, but it works.
ID2D1Bitmap* convertImageToBitmap(ID2D1Image* pImg, D2D1_SIZE_U size)
{
ID2D1Image* oldTarget = NULL;
ID2D1Bitmap1* targetBitmap = NULL;
//Create a Bitmap with "D2D1_BITMAP_OPTIONS_TARGET"
D2D1_BITMAP_PROPERTIES1 bitmapProperties =
D2D1::BitmapProperties1(
D2D1_BITMAP_OPTIONS_TARGET,
D2D1::PixelFormat(DXGI_FORMAT_B8G8R8A8_UNORM, D2D1_ALPHA_MODE_PREMULTIPLIED)
);
pDeviceContext->CreateBitmap(size, 0, 0, bitmapProperties, &targetBitmap);
//Save current Target, replace by ID2D1Bitmap
pDeviceContext->GetTarget(&oldTarget);
pDeviceContext->SetTarget(targetBitmap);
//Draw Image on Target (if currently not drawing also call Begin/EndDraw)
pDeviceContext->DrawImage(pImg);
//Set previous Target
pDeviceContext->SetTarget(oldTarget);
oldTarget->Release();
return targetBitmap;
}