overlay

问题 I am developing an application using opencv as my college project, it's almost done except that i am unable to overlay a animated video( a flash video) over my camera stream, i want to capture user mouth and after detecting mouth i want to overlay a animated video of smoke. Please can anyone help me with the overlaying part? If it is not possible can you shed some light on any workaround I am using opencv 2.3.1 and ubuntu 11.10. 回答1: Basically, all you need to do is set a ROI (Region of

问题 I'm trying to create a video using the follwing code: `$`ffmpeg -loop 1 -r 5 -i video.png -r 5 -i progress.png -filter_complex "overlay=x='if(gte(t,0), -W+(t)*5, NAN)':y=H-h" -i video.mp3 -acodec copy video.mp4 I have the following files video.png this is a 1280x720 px still frame that is simply a background with a waveform of the video.mp3 file progress.png this is simply a 1280x100 px semi-transparent image that should simulate an animation (from from 0 to 100% of the width of the video.png

问题 I want to show an overlay div sitting on top of the hovered div similar to this effect on IBM website: http://www.ibm.com/us/en/ Please look at the 3 boxes near the footer. Hover on the box "Let's build a smarter planet" to view the effect. 回答1: I've created a working example. Basically you need to create 3 divs with a visible and the invisible containers, add hover event handler and toggle the tooltip's visibility in that handler. HTML: <div class="parents"> <div class="box type-1">box 1<

问题 Recently, I tried creating an Ionic side menu. I want to make the side menu overlaying contact. I do not want to push content, however. <ion-side-menus> <!-- Center content --> <ion-side-menu-content ng-controller="ContentController"> </ion-side-menu-content> <!-- Left menu --> <ion-side-menu side="left"> </ion-side-menu> <!-- Right menu --> <ion-side-menu side="right"> </ion-side-menu> <ion-side-menu-content> <!-- Main content, usually <ion-nav-view> --> </ion-side-menu-content> </ion-side

问题 I am developing a WPF application. Main window's child controls are contained in a grid. The bottom row contains a status bar. The application must notify the user. I want to programmatically display a notification in a user control in the bottom right corner of the main window. I want the notification user control to be displayed over the status bar and the control in the above row. How can I display a control over other controls contained in a grid ? Any help will be greatly appreciated 回答1

问题 In the android source in the device/sample folder there is a folder called overlays . You see the same overlay folder in e.g. the cyanogen mods. What is this overlay folder? How does it work? What is it used for? Where can I read more about it? Thanks in advance 回答1: For instance, imagine that you want to modify some files in Android source for your device (for instance, you want to add additional string to Launcher resources). It is not recommended to modify the actual sources of Android.

问题 I feel like I've been endlessly searching for a solution to this and cannot find one anywhere. Basically, I need to overlay coloured contour maps as different layers (with different colours) onto a ggmap and cannot get this to work for my life. What I'm trying to do is take the example illustrated here: Overlay two ggplot2 stat_density2d plots with alpha channels only instead of mapping this onto a ggplot(), map it onto a ggmap(). I've read here: ggmap with geom_map superimposed that part of

问题 I'm using Google's CameraPreview sample demo. Here, I have the cameraPreview, and an overlayed image over cameraPreview. When I take the photo, only the cameraPreview is saved, but I need the overlay image to be saved too over the cameraPreview. This is the way I save cameraPreview's photo, but I need to know what would be the best way for overlaying booth images and save them into one. public void onPictureTaken(byte[] data, Camera camera) { String photoPath = Environment

问题 I would like to overlay two images in MATLAB ( I and imagesc(data) ) and then draw a rectangle on top of those. I2 specifies the transparency pattern in the following code. The rectangle becomes a line on top of the image. Can anyone tell me why the rectangle is not drawn correctly? imshow(I); hold on; h = imagesc(data,[0,1]); hold off; I2 = ones(height,width) * 80; set(h, 'AlphaData', I2); rectangle('Position',[100,100,20,20]); 回答1: Since we can't reproduce your code exactly without all the

问题 How can i add circular, triangle, square image overlay to UIImagepickercontroller as per above pic and when user presses camera button then only image inside circular or triangular or square must be captured. I have used below code but its not giving proper result. kindly see below pic. Which is totally reverse what i want to achieve. -(void)openCamera { self.pickerController = [[UIImagePickerController alloc] init]; self.pickerController.delegate = self; if ([UIImagePickerController