The second question you asked is relatively easy. There are two because one of them will return raw data ignoring the format (Uncompressed data direct from the camera). The other actually follows the format settings.
The first question, however, is more difficult. The only specs I've been able to find on the 422 is that it's essentially 4 bytes of data with 2 pixels in it (equating to 6 rgb bytes. To "decompress" the data use the following algorithms. U = yuv[0] Y1 = yuv[1] V = yuv[2] Y2 = yuv[3] Then use equation to convert YUV to RGB is (remember to apply it to both Y1 and Y2): R = Y + 1.140V G = y - (0.395 * U) - (0.581 * V) B = Y + (2.032 * U) That, as far as I know, should get you a perfectly usable RGB picture out of it. Some notes about the emulator: It seems when you take a picture, it returns a picture that actually has many versions of the picture within it. Not sure why this happens, probably due to the video of the "capture" being lower res than the preview pane, thereby making the preview larger than the rendered video and the system seems to map it over. Not sure on this, but it *SHOULD* be all better when we run it on hardware. Unfortunately, no way to be sure on this until Oct 22. Now, I may be wrong on any of this, unfortunately I haven't completely tested it. On Oct 2, 8:59 am, walterc <[EMAIL PROTECTED]> wrote: > where is the specs for YCbCr_422_SP pixel format? i can get the > preview data and, after some guessing and googling, can display the > image. but the image displayed doesnt match the preview display. i > am sure my effort to decode the data is at fault but how can i correct > it? > > please give us the spec for the documented pixel formats or your > effort to come up with the api doesnt do you (google) and us any good! > > btw, please tell me why there are 2 PictureCallback arguments in > Camera.takePicture(Camera.ShutterCallback shutter, > Camera.PictureCallback raw, Camera.PictureCallback jpeg) when only one > picture format will be returned (implied by > Camera.Parameters.setPictureFormat)? > > regards, > > walter chang --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com 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 -~----------~----~----~----~------~----~------~--~---
