preview

What I need to do is quite simple, I want to manually display preview from camera using camera callback and I want to get at least 15fps on a real device. I don't even need the colors, I just need to preview grayscale image. Images from camera are in YUV format and you have to process it somehow, which is the main performance problem. I'm using API 8. In all cases I'm using camera.setPreviewCallbackWithBuffer(), that is faster than camera.setPreviewCallback(). It seems that I cant get about 24 fps here, if I'm not displaying the preview. So there is not the problem. I have tried these

To be more specific, I want to use a form with one or more file input fields used for images. When those fields are changed, I'd like to show a preview of the associated image, before sending the data to the server. I've tried a number of javascript approaches, but I always run into security errors. I wouldn't mind using java or flash, as long as the solution degraded gracefully for those users who didn't have them. (They wouldn't get previews, and they wouldn't get an annoying 'install this thing' either.) Has anyone done this in a simple, reusable way? P.S. I know there's a sandbox, but does

Is there any way to disable the image preview after taking a picture with the UIImagePickerController? I want to dismiss the ImagePicker as soon as the user pressed the shutter release button. erastusnjuki I asked a similar question here My solution was to create a customized view on top of the default UIImagePickerControllerView. I downloaded the example Augmented Reality Then you can use the OverlayView.m and OverlayView.h by adding them to your project: I made the custom picker toolbar, picker and overlayView global so that I can access them anywhere in the project. In your ViewController.h

I need to obtain raw preview data from Camera object at least 15 frame per second , but I can only get a frame in 110 milliseconds which means I can get only 9 frames per second. I brief my code below. Camera mCamera = Camera.open(); Camera.Parameters parameters = mCamera.getParameters(); parameters.setPreviewFrameRate(30); parameters.setPreviewFpsRange(15000,30000); mCamera.setParameters(parameters); mCamera.addCallbackBuffer(new byte[dataBufferSize]); //dataBufferSize stands for the byte size for a picture frame mCamera.addCallbackBuffer(new byte[dataBufferSize]); mCamera.addCallbackBuffer

I'm working on an android app that is processing the input image from the camera and displays it to the user. This is fairly simple, I register a PreviewCallback on the camera object with the setPreviewCallbackWithBuffer . This is easy and works smoothly with the old camera API public void onPreviewFrame(byte[] data, Camera cam) { // custom image data processing } I'm trying to port my app to take advantage of the new Camera2 API and I'm not sure how exactly shall I do that. I followed the Camera2Video in L Preview samples that allows to record a video. However, there is no direct image data