Hello Blindfold, Thanks for your help. I solved the user interface problems I was experiencing by using a separate thread to do my image processing. I'm still using an ImageView, and without problems. Perhaps I will try a Canvas in a SurfaceHolder later in this exercise to compare speeds.
MORE ON THE CAMERA LIVE PREVIEW FILTERED DISPLAY CAPABILITY As you know, I want to display live camera data through a custom filter. I got most of the way through the YCbCr_422_SP data buffer returned to Android's Camera.PreviewCallback onCameraFrame() callback function, and now I am looking for help decyphering the U, V portion of the buffer. I verified that the first (width*height) bytes are simple Y luminance values that can be displayed (via Bitmap and ImageView) to make a viable gray-scale image. The total number of bytes are (width * height * 3 / 2). The remaining 1/2 image bytes are clearly used to store U, V (Cb, Cr) data. Therefore, there are 1/4 image bytes for each U, V component (i.e. each U, V component is used for 4 pixels of the image). This looks like 411 or 420 data, not 422, but we have bigger fish to fry. I cannot determine if the U V data is aligned adjacently, in alternating rows, or in squares as described in this Wikipedia graphical description: http://en.wikipedia.org/wiki/Image:Yuv420.svg. Once I finally determine the structure of the U, V data, I have several equations to convert from YUV to RGB and I have tried many ways of combining the UV data with the luminance data of the first 2/3 of the buffer to no avail. So far I can only display mono-chrome. If you or others on this list can decode the Android YCbCr_422_SP data, please post the solution as soon as possible. Your efforts and generosity are greatly appreciated. I am convinced that representatives from Google/Android and others monitoring this list know how to do this. Please share the information. It is crutial to our project. I do not care about the Emulator and it's different encoding. I realize that Google is probably waiting to implement a unified solution and share it through an API update, but we cannot wait. - Thank you, David Manpearl On Nov 26, 10:23 am, blindfold <[EMAIL PROTECTED]> wrote: > Hi David, > > > I can't seem to make coexist: SurfaceHolder for the camera & ImageView > > for the filtered Bitmap to display. > > ... > > > Do you know why I can't make the Camera's Surface and an ImageView > > Bitmap simultaneous members of the same active ViewGroup? > > I do not use ImageView myself so I cannot really judge your problem. I > draw my filtered Bitmap to a Canvas in a SurfaceView. No ImageView > anywhere. > > Regards --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
