camera

来源： https://stackoverflow.com/questions/50441947/slow-face-detection-firebase-mlkit

来源： https://stackoverflow.com/questions/62814148/image-not-uploaded-to-database

来源： https://stackoverflow.com/questions/62963936/qt3d-billboards-how-to-make-plane-always-face-to-camera

来源： https://stackoverflow.com/questions/62963936/qt3d-billboards-how-to-make-plane-always-face-to-camera

来源： https://stackoverflow.com/questions/62963936/qt3d-billboards-how-to-make-plane-always-face-to-camera

问题 I'm rusty a bit here. I have a vector (camDirectionX, camDirectionY, camDirectionZ) that represents my camera direction of view. I have a (camX, camY, camZ) that is my camera position. Then, I have an object placed at (objectX, objectY, objectZ) How can I calculate, from the camera point of view, the azimut & elevation of my object ?? 回答1: The first thing I would do, to simplify the problem, is transform the coordinate space so the camera is at (0, 0, 0) and pointing straight down one of the

问题 I'm building a Native-Android/WebView-App thats code is hosted on a remote server (in HTML and Javascript). The Web App has a function that launches the phone's camera via a HTML form, input request: <form action="#" method="post" enctype="multipart/form-data" > <input name="image" type="file" accept="image/*" capture/> </form> This feature works perfectly well in the standard Android web browser but not in the Native App WebView browser. I have enabled the following permissions in the Native

问题 I'm building a Native-Android/WebView-App thats code is hosted on a remote server (in HTML and Javascript). The Web App has a function that launches the phone's camera via a HTML form, input request: <form action="#" method="post" enctype="multipart/form-data" > <input name="image" type="file" accept="image/*" capture/> </form> This feature works perfectly well in the standard Android web browser but not in the Native App WebView browser. I have enabled the following permissions in the Native

问题 Basically, My camera app is set to Portrait Mode. However, user can take photos in Potrait or landscape by rotating the phone accordingly (The app doesnt rotate). So my question is, how can we find the captured image orientation? I tried using DisplayManager.DisplayListener , however, it works only when orientation of app happens. Since I have blocked the orientation of app to portrait mode, it doesnt get any callbacks here. I even tried using ExifInterface , however, it always gives 6 as

问题 Does anybody knows if its possible to make a Image picker like this: I've tried with the followings plugins : https://github.com/jamesmontemagno/MediaPlugin https://github.com/matheusneder/Xamarin.Forms.ImagePicker I do not want to create buttons to be able to perform each operation, what I want is that with a single button I suggest which application to use. This is possible? Thanks. 回答1: If you want to pick a photo from the phone's picture library, due to Xamarin.Forms does not include this