Category: Android camera preview rotated

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. However I have the Preview within an Activity that has other elements in it and it does not make sense for my Activity to be displayed in landscape mode.

Its disabled by default. So I was wondering is there anyway to just change the orientation of the Preview? And leave the rest of my Activity correctly displayed in Portrait mode? This issue appeared to start out as a bug with certain hardware see here but can be overcome by using the call to mCamera.

So this is how I implement it:. This was on an HTC Desire and I had to initially put in logging statements in each of the rotation checks to say what the rotation was and then debugged on the device and watched the logCat output while I rotated the device. In the code you'll see I didn't need to do any display rotation when the phone was at 90 or degrees - the device seemed to handle this itself.

Only one point not working properly: The degree rotation is when you turn the device 90 degrees clockwise and the display rotation counters that ok but if you rotate the device degrees counter-clockwise, it doesn't appear to compensate it properly. I was having a problem with front Camera Upside down issue. Then I used the following method documented in Android Docs. I did it taking advice of mCamera. I have compared my code to the tutorial one and what finally fixed it was putting the following code into my AndroidManifext.

Learn more. Android - Camera preview is sideways Ask Question. Asked 9 years, 6 months ago. Active 1 month ago. Viewed 93k times. I am using a Preview to display what the camera see's on the screen.

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I can get everything working fine, surface created, surface set and the surface is displayed. However it always displays the picture at an incorrect 90 degree angle in portrait mode. Such as in the picture: I am aware that using the following code will set the picture straight: setRequestedOrientation ActivityInfo.

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Its disabled by default So I was wondering is there anyway to just change the orientation of the Preview? Or anyway to rotate the preview so that it is displayed correctly? Donal Rafferty Donal Rafferty Have a look - stackoverflow. Active Oldest Votes. Note the swapover of width and height in the appropriate rotations. If you have any solution for lower versions please help me.

I implemented a preview on my app which will always show in portrait mode. I was always rotating the screen by 90 degrees and this seemed to work on every device until we tested it on the HTC Desire C.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

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Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I have created a camera app and I want my app to be turned in all 4 possible orientations and the to update the camera preview accordingly. I have tweeked the values, testing them on the samsung galaxy tab2 to finally get the right orientations and it all works. When I tried it on htc one s phone it doesn't work at all!!!!!

All e orientations are totally wrong! So I have arrived to the conclusion that thre must be 2 type of devices or more How could I find out about this default rotation and act accordingly in my code?

And one important thing is whether the Camera HAL code implemented by the manufacturer is compliant with Google's protocol. Learn more. Asked 7 years, 4 months ago. Active 8 days ago. Viewed 9k times.

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Use ExifInterface to get the orientation. Active Oldest Votes. Zephyr Zephyr 4, 27 27 silver badges 31 31 bronze badges. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password.

android camera preview rotated

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Feedback on Q2 Community Roadmap. Technical site integration observational experiment live on Stack Overflow. Dark Mode Beta - help us root out low-contrast and un-converted bits. Linked The Camera API on Android supports very little native functionality for square photos, limiting you to the resolutions that the camera supports, which varies from device to device.

In order to accomplish this, we overlay views on top of the camera preview to make it look square:. You can see we make the SurfaceView our camera preview match the full width and height of the layout, taking up the full screen. We use a RelativeLayout as the parent so we can then create an overlay view, here another RelativeLayoutand align it to the bottom of the parent, on top of the preview.

After that, in our Activity, we set the height of the overlay so that it fills enough of the screen to make the preview appear to be square.

android camera preview rotated

We do that by setting the height equal to the height of the preview, minus the width. After you initialize your camera, try to match the preview and picture sizes to a value that is greater than the size of the square we want:. Next we look at the cameras supported picture sizes - the size of the actual pictures that can be taken. It is possible that there is no picture size that matches the preview size, so in this case we default to the first picture size.

You can start the preview and handle permissions in accordance with the Android Developer Guidebut once it comes to handling the captured photo, we have one more thing we need to do. For more information on how to do this, see the setDisplayOrientation sample code. Calling this from the onPictureTaken event of the Camera.

PictureCallback interface will give us a perfectly square image that matches the preview displayed to the user. Blog Contact. Luckily, square photos are achievable using the following steps: Display a fullscreen camera preview with non-transparent overlays to make it look square.

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When the photo is taken, crop the section of the image that matches your square preview. Square Preview. Let me know if this post was helpful on Twitter kylewbanks or down below, and follow me to keep up with future posts!I would like it to work for multiple UI orientations.

Tutorial: Creating a Square Camera (With Preview) on Android

I am trying to figure out how to rotate the camera. I know what I have to do is write something like this.

android camera preview rotated

The camera still displays "sideways". If anyone has done a similar thing, please let me know. You ever find an answer to this?

android camera preview rotated

There seems to not be a solution anywhere on the internet for this. Any other solutions like itay's posted below out there rely on pixel manipulations that vastly degrade the framerate I don't think there is a way to to this, without some pixel manipulation.

However, at least the resizing suggested by itay is not necessary and Performance impact of my solution was small. The problem is that onPreviewFrame callback will always return the frame in landscape mode no matter what orientation was set to the camera thats documented behavior.

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The Second problem is that JavaCameraView will get a wrong small preview size if used in portrait mode. I solved it by creating my own subclass of the CameraBridgeViewBase class for most parts the same as JavaCameraView It uses the reversed landscape width and height to get the preview size and for the frame chain, but the portrait width and height as the size of the returned CameraFrame.

Idol can you please paste the code where you incorporated it in tutorial1. This is resulting in performance degradation. The camera preview is not realtime and lags by an unacceptable margin. Any idea? Little explanation: first i load the input matrix, then i made a matrix pattern with the new size, then i flip it so the image flip by 90 degrees and finally i return to the original matrix size.

This results in massive performance degradation I tried this, it does flip the image by 90 degrees but degrades performance and pinches the image. Step 1. Step 3. Search for mCamera. I've just set up my environment yesterday and plan to start working later on. Asked: OpenCV for Android 2. Camera image processing slower on android opencv tutorial 1 vs opencv tutorial2.

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Hi there!The above solution works upto showing the preview as portrait but not saved as portrait persistently. I am trying to use OpenCV 2. I would like it to be able to have multiple UI orientations, not just Landscape.

I understand that I could just rotate the input image before doing image processing and thus leave the orientation as landscape onlywhich is fine and works, but doesn't solve the problem that the rest of my UI will be in the wrong orientation. I have also tried using this code to rotate the camera 90deg, but it just doesn't seem to work.

OpenCV camera display Orientation problem SOLUTION in Android Studio

Take a look at my sample codewhich is based on some of the older OpenCV samples and uses pure Android code. You may be able to find the old OpenCV4Android samples on the internet, though they were taken out a few versions ago. However, the linked sample code and the snippet above should be enough to get you started. Unfortunately Opencv4Android does not support portrait camera. But there's a way how to overcome it.

Java ,the two constructor, add initialization of WindowManager:. I was resolved that issue as the following way.

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The problem is that when I change the orientation to portrait, the image comes out sideways. My class extends from JavaCameraView. In the deliver and draw frame method: if canvas! Basically, this just roatates the input image like so This is better, but I obviously want this to be full screen.

All answers here are hacks.

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I modified the CameraBridgeViewBase. Also,you can make the preview size larger than the screen. Just modify the scale. CameraBridgeViewBase ; if styledAttrs. How can we speed up the Android emulator? Is there a unique Android device ID?

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Controlling the camera to take pictures in portrait doesn't rotate the final images.You configure each CameraX use case to control different aspects of the use case's operations. For example, with the image capture use case, you can set a target aspect ratio and a flash mode.

The following code shows one example:. In addition to configuration options, some use cases expose APIs to dynamically alter settings after the use case has been created. For information on configuration that is specific to the individual use cases, see Implement a previewAnalyze imagesand Image capture. CameraX automatically provides functionality that is specific to the device that your app is running on.

For example, CameraX will automatically determine the best resolution to use if you don't specify a resolution, or if the resolution you specify is unsupported. All of this is handled by the library, eliminating the need for you to write device-specific code. CameraX's goal is to successfully initialize a camera session. This means CameraX compromises on resolution and aspect ratios based on device capability. The compromise may happen because:. Although CameraX creates and manages the session, you should always check the returned image sizes on the use case output in your code and adjust accordingly.

By default, the camera rotation is set to match the default display's rotation during the creation of the use case. In this default case, CameraX produces outputs to allow the app to easily match what you would expect to see in the preview.

You can change the rotation to a custom value to support multi-display devices by passing in the current display orientation when configuring use case objects or dynamically after they have been created. Your app can set the target rotation using configuration settings.

It can then update rotation settings by using the methods from the use case APIs such as ImageAnalysis. You might use this when the app is locked to portrait mode—and so no reconfiguration occurs on rotation—but the photo or analysis use case needs to be aware of the current rotation of the device.

For example, rotation awareness may be needed so faces are oriented correctly for face detection, or photos are set to landscape or portrait. Data for captured images might be stored without rotation information.

Exif data contains rotation information so that gallery applications can show the image in the correct orientation after saving.

To display preview data with the correct orientation, you can use the metadata output from Preview. PreviewOutput to create transforms.

Based on the set rotation, each use case will either rotate the image data directly or provide rotation metadata to the consumers of the non-rotated image data. Alternatively, you can set a specific target resolution or a specific aspect ratio in use cases that support that configuration. CameraX can automatically determine the best resolution settings based on the use cases specified in cameraProcessProvider.

Whenever possible, specify all the use cases needed to run concurrently in a single session in a single bindToLifecycle call.You configure each CameraX use case to control different aspects of the use case's operations. For example, with the image capture use case, you can set a target aspect ratio and a flash mode. The following code shows one example:.

In addition to configuration options, some use cases expose APIs to dynamically alter settings after the use case has been created. For information on configuration that is specific to the individual use cases, see Implement a previewAnalyze imagesand Image capture. CameraX automatically provides functionality that is specific to the device that your app is running on.

For example, CameraX will automatically determine the best resolution to use if you don't specify a resolution, or if the resolution you specify is unsupported. All of this is handled by the library, eliminating the need for you to write device-specific code. CameraX's goal is to successfully initialize a camera session. This means CameraX compromises on resolution and aspect ratios based on device capability.

The compromise may happen because:. Although CameraX creates and manages the session, you should always check the returned image sizes on the use case output in your code and adjust accordingly. By default, the camera rotation is set to match the default display's rotation during the creation of the use case. In this default case, CameraX produces outputs to allow the app to easily match what you would expect to see in the preview.

You can change the rotation to a custom value to support multi-display devices by passing in the current display orientation when configuring use case objects or dynamically after they have been created.

Your app can set the target rotation using configuration settings. It can then update rotation settings by using the methods from the use case APIs such as ImageAnalysis. You might use this when the app is locked to portrait mode—and so no reconfiguration occurs on rotation—but the photo or analysis use case needs to be aware of the current rotation of the device. For example, rotation awareness may be needed so faces are oriented correctly for face detection, or photos are set to landscape or portrait.

Data for captured images might be stored without rotation information. Exif data contains rotation information so that gallery applications can show the image in the correct orientation after saving. To display preview data with the correct orientation, you can use the metadata output from Preview. PreviewOutput to create transforms. Based on the set rotation, each use case will either rotate the image data directly or provide rotation metadata to the consumers of the non-rotated image data.

Alternatively, you can set a specific target resolution or a specific aspect ratio in use cases that support that configuration. CameraX can automatically determine the best resolution settings based on the use cases specified in cameraProcessProvider.

Whenever possible, specify all the use cases needed to run concurrently in a single session in a single bindToLifecycle call. The intent is to allow the application to run on a wide variety of devices while minimizing device-specific code paths. Use cases have a configurable aspect ratio to allow the application to specify the desired aspect ratio based on UI design. CameraX output will be produced to match the aspect ratios requested as closely as the device supports.


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