I'd like to find an image (needle) within an image (haystack). To keep things simple I take two screenshots of my desktop. One full size (haystack) and a tiny one (needle). I then loop through the...

I got reference from this link (Mifare Ultralight C Lock) to make all pages on a Mifare Ultralight tag read-only. I can write a message on a Mifare Ultralight tag successfully on Android. Now I wa...

I'm attempting to lock a Mifare Ultralight C tag. I want to set NDEF pages 0x04 to 0x27 to read-only. I think this can be achieved via Ndef.makeReadonly(). Additionally, I would like to set pages ...

I think I've found a MUCH faster way to copy bitmaps in c#. (If it's valid, I'm sure I wasn't the first but I haven't seen it anywhere yet.) The simplest way I can think to ask this is to assert w...

Is that ok to Write and Read directly from a unlocked Bitmap unmanaged memory? Can I keep using the BitmapData after I UnlockBits of the Bitmap? I did a test app where I can read the pixel of the ...

I'm working on 10 megapixel images taken by a video camera. The aim is to register in a matrix (a two-dimensional array) the grayscale values for each pixel. I first used GetPixel but it took 25 ...

I'm using locked bitmaps a lot recently, and I keep getting "attempted to access invalid memory" errors. This is mostly because the bitmap has been moved in memory. Some people using GCHandle.Alloc...

Hey all. I resorted to using LockBits for 2d bitmap image rotation after getting fed up with the slow performance and wacky behavior of both Get/Set Pixel, and RotateTransfom. So here is the code I...

So, I am very confused over a quick test that I just ran. I am doing some image processing in C#. Get/SetPixel() have proven to be too slow, so I am using LockBits to get at the raw data. However...