c# - Is it possible to use a shader to find the "difference" between two textures? (XNA/HLSL) -

-

I have created a simple webcam based application that detects "the edges of the speed", so draws a texture that Indicates where the pixels are different from the current frame is different from the previous frame. This is my code: 

  // is a Texture2D of the last frame // current piece is a texture2D of the current frame // The difference is another texture2D // Variance is an int, the default is 100; Color [] difference data = new color [current cloth Mode * Current results. height]; Color [] currentData = new color [current cloth. Ritual * current mix. height]; Color [] lastData = new color [last cloth With * final cloth] high]; CurrentTexture.GetData & LT; Color & gt; (CurrentData); LastTexture.GetData & LT; Color & gt; (LastData); For (int i = 0; i & lt; current data langti; i ++) {int sumCD = ColorSum (current data [i]); // ColorSum C. R + C B + C G is similar to where there is a color. Int sumLD = ColorSum (final data [i]); If ((sumCD> NMD-NIdD) & amp; amp; and (sumCD & lt; sumLD + variance) difference data [i] = new color (0, 0, 0, 0); // If the current pixel is within the range of +/- variation (default: 100) variable, this has not changed significantly, so it is black Other difference data [i] = new color (0, (byte) monastery Abs (sumCD-sumLD), 0); // It has changed a lot so that the shade of green can be prepared. } Difference difference = New texture 2D (game1.GraphicsDevice, current piece. Witth, current piece. Highlight); DifferenceTexture.SetData & LT; Color & gt; (DifferenceData); Letteresure = New Texture 2D (Game 1. Graphics Device, Content Identity, Contritation. Height); LastTexture.SetData & LT; Color & gt; (CurrentData);

Is this calculation a way to load the GPU using the shaders (it can go to 25/26 FPS using the above method, but this is a bit slow)? I have a basic understanding of how HLSL shaders work and do not expect a complete solution, I just want to know that this would be possible and how to get "difference" textual data from Shaad and it really does not get any faster Ho .

Thank you in advance.

Dual thread approach to your problem, from Microsoft See Net Parallel Extensions CTP.

If you are not planning to deploy an XBox360, then this library works well with XNA, and I've seen improvements in speed and speed in some loops and iterations.

You must change only a few line codes, for example: 

 for  (int i = 0; i & lt; currentData.Length; i ++) will change to {// ...}

: 

  parallel.for (0, current data length, representative (intI) {// ...});

In order to automatically create each core in your processor, help with number crunching. It's fast and excellent.

Good luck!


Comments

Post a Comment

Popular posts from this blog

c# - ListView onScroll event -

-
I am programming a simple C # application, and I need a Scallow event on the list view. So I inherited the original ListView class created in ListviewEx witch. I found out how to locate the scroll message from WinAPI and I modified the WndProc method. Now I have this WndProc: protected override zero WndProc (Ref message message) {base.WndProc (Ref I); If (m.msg == WM_VSCROLL) {onScroll (This, New EventArgs ()); }} But the problem is, I do not know how to know about scrolling information. This data should be in wParam, but there is a LOWORD macro ++ like in C in C # and I switch to find the criteria like SB_ below, SB_ENDSCROLL, SB_PAGEUP etc. there any way Need to change the LOWORD macro from C #? Or any other way to find the necessary parameters about scrolling? You can define the WParam constants as the following: Private const int WM_HSCROLL = 0x114; Private Constant WM_VSCROLL = 0x115; Private contact int SBHOZZ = 0; Private Consultant SB_VERT = 1; Private Con...
Read more

PHP - get image from byte array -

-
I am trying to create a back-end for my mobile application. I am sending the content of an image in the body of the HTTP request (output stream) as a byte array, I want to read this stream of bytes in PHP scripts and take back an image. Can anyone tell me how can I do this? Thank you. You can obtain the request body $ body = Reading from file_get_contents ('php: // input'); What you do with that data Depending on you, you can write the data in a file as you mentioned that this is image data, you can drop the data into the object can do. Another option is to use and load the image.
Read more

Linux Terminal Problem with Non-Canonical Terminal I/O app -

-
I have a small app written in C to run on Linux. Part of the app accepts user-input from keyboard , And it uses non-canonical terminal mode so that it can respond to each keystroke. The section of the code that accepts input is a simple task that is called repeatedly in the loop: char get_input () {char C = 0; Int res = reading (input_tamille, & amp; c, 1); If (RSS == 0) 0 returns; If (res == -1) {/ * snip error handling * /} return c; } It reads a letter from the terminal if there is no input within a given time limit, (c_cc [VTIME] value in the vocabulary structure), read () 0 And get_input () is called again It all works very well, I have recently discovered that if you run this app in a terminal window, and then the app Close the terminal window without ending, the app will not exit Received, but CPU intensive launches into an infinite loop, where the read () returns 0 without waiting continued. So how can I get out of the apple if it runs from the terminal win...
Read more