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I have a question about how to get the dominant color of an image (a photo). I thought of this algorithm: loop through all pixels and get their color, either red, green, yellow, orange, blue, magenta, cyan, white, grey or black (with some margin of course) and it's darkness (light, dark or normal) and afterwards check which colors occurred the most. I think this is slow and not very precise. Is there a better way? If it matters, it's a UIImage taken from an iPhone or iPod touch camera which is at most 5 Mpx. The reason it has to be fast is that simply showing a progress indicator doesn't make

For the university i've to develop an application on android with the face detections. For this i've to save various photo on my gallery. The problem is that after saving the photo, the gallery do not update. More precisely, if I delete the directory where I'm going to save the image, I open the application and shoot the photo, then going into the gallery and after an "update" I see the photo. But once I have the directory, if I take a new picture, this did not overwrite the old one. Online i've found this: sendBroadcast(new Intent(Intent.ACTION_MEDIA_MOUNTED,Uri.parse("file://" + Environment

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 know this has answers here and there, but I couldn't make any of them work. Does anybody know a good reference, or a tutorial for this, maybe also post here? What I need to do is : 1) provide a button, that opens the camera application. I have done this by a startResultActivity() 2) user takes the photo, and returns to the application, with the photo saved, preferably with a preview in an ImageView. I tried something, but I cannot test in an emulated device. 3) presses a "send" button, and the application sends the picture to HTTP POST. With "multipart", whatever that is. The php developer