android camera image recognition

There are two ways to implement a photo in Android, one is to call the system's own camera and then use the photo data it returns. Another one is to use the camera class and other related classes to achieve the camera function, this method of the system is relatively high, dyeing is also more complex, the general commo

Android implements a custom camera interface First, we can achieve the circular effect of the photo button. In Android development, of course, we can ask the artist to design the image and then take it directly. However, we can write our own code to achieve this effect, the most common method is to use layout-list to o

Camera focusing: in principle, the vertical seekbar is used to obtain the distance based on the user's drag, and then set it to Camera in the form of Parameter. OnSeekBarChangeListener /* * (Non-Javadoc) * * @ See * Android. widget. SeekBar. OnSeekBarChangeListener # onProgressChanged (android *. Widget. SeekBar

; Compensate The Mirror} else {//back-facing result = (info.orientation-degrees + 360)% 360; } camera.setdisplayorientation (Result); }The method of dynamic acquisition is landscape (horizontal screen) or portrait (vertical screen) to change the preview map.(The cameraid of the rear screen is 0)2. The correct angle of image preservation (when we take the photo, we find that the angle is not correct)@Overridepublic void Onpicturetaken (byte[] dat

This example for you to share the Android open camera and photo album specific code for your reference, the specific contents are as follows Turn on the camera /** * Select camera /private void Showcamera () { //Jump to System camera Intent camerainte

Android Camera Real-Time Filter (4), androidcameraImplementation of custom algorithms based on PS special effects on Android platform Created with Rapha rjl 2.1.2 Start Image Bitmap

save path here in the directory file picture =NewFile (environment.getexternalstoragedirectory () +ImageName);//Crop a pictureStartphotozoom (Uri.fromfile (picture)); }if (data = =Null)Return;//Reading album cropping picturesif (Requestcode = =Photo_compile) {//Crop a pictureStartphotozoom (Data.getdata ()); }//Crop photo processing resultsif (Requestcode = =Photo_resoult) {Bundle Extras =Data.getextras ();if (Extras! =Null) {Bitmap photo = Extras.getparcelable ("Data"); Bytearrayoutputstream s

Android custom controls-3D galleries and image matrices 1.3D gallery implementation We know that the android system has provided us with a "Container" for displaying images-Gallery. However, this Gallery shows flat effects and does not have a strong dynamic effect. Here, we are working on a custom Gallery component to display the 3D effects of images. Think about

Call camera in Android to get pictures can be obtained in two ways, first of all by invoking system services to open the cameraIntent Intent = new Intent (mediastore.action_image_capture);Startactivityforresult (Intent,requestcode);The first method is to get the picture from the result returned by Startactivityforresult, as follows: if (RESULTCODE==RESULT_OK) { if (requestcode==req_1) { Bundle

Android Image Upload (Avatar cropping + original image ), Again, the project has been busy for a long time and this article has finally been completed! Let's take a look at it first: (1) Avatar cropping and uploading Server() Generally, there is a circular display of the Avatar. Here I have customized an ImageView. The page is very clean, but it looks very good!

Main Program: Public class androcamera extends activity { Private Static final int image_capture = 0; Private button startbtn; Private URI imageuri; Private imageview; /** Called when the activity is first created.* Sets the content and gets the references* The basic widgets on the screen like* {@ Code button} or {@ link imageview}*/@ OverridePublic void oncreate (bundle savedinstancestate ){Super. oncreate (savedinstancestate );Setcontentview (R. layout. Main );Imageview = (imageview) fin

, hides the progress dialog box}Super.onprogresschanged (view, progress);}For Android 3.0+public void Openfilechooser (valuecallbackif (muploadmessage! = null)ReturnMuploadmessage = uploadmsg;Startactivityforresult (Createdefaultopenableintent (), Filechooser_resultcode);}For Android @SuppressWarnings ("unused")public void Openfilechooser (valuecallbackOpenfilechooser (Uploadmsg, "");}For

view the value of the photo ID longid= Mcursor.getlong (Mcursor.getcolumnindex (mediastOre. images.media._id)); NBSP;NBSP;NBSP;NBSP;NBSP;NBSP;LOG.I ("mediastore.images.media_id=", id+ "");// filter out unwanted images, Only get pictures in albums that store photos after taking pictures stringpath=mcursor.getstring ( Mcursor.getcolumnindex (MediaStore.Images.Media.DATA));if ( Path.startswith (sdcardpath+ "/dcim/100media") | | path.startswith (sdcardpath+ "/dcim/

Android gets multiple recent photos from the album (get the photos stored by the camera) When you are working on a company project, you need to customize the grid view of the displayed photos to display the first 20 photos that you have taken with a recent camera. I checked the API provided by the system and did not find the path constant pointing directly to st

(ImageView child, Transformation t, int rotateAngle) {// Save the effect of image changes camera. save (); Matrix imageMatrix = t. getMatrix (); int rotate = Math. abs (rotateAngle); int imageWidth = child. getWidth (); int imageHeight = child. getHeight (); // z: positive number: The image becomes larger // x: horizontal movement // y: vertical movement of

In the past 2 months, the basic requirements of the project have been basically customized and evaluated, which revolves around the A31 and Android4.2.2. Recently, due to the need, in the framework of modifying his camera, the application needs to give Hal a parameter to control the implementation of the underlying image processing algorithm, that is, to provide a reasonable API for the development and use

Android Camera technology (1) The Android SDK supports operations on built-in cameras of Android devices. You can operate multiple cameras (mainly pre-cameras and post-cameras) Starting with Android2.3 ). You can take photos and videos through a camera. Quick photo taking (

(Environment.getexternalstoragedirectory (), Image_file_name) ; Croprawphoto (Uri.fromfile (tempfile)); else {Toast.maketext (getapplication (), "No sdcard!", Toast.length_long). Show (); Case Code_result_request:if (Intent!= null) {Setimagetoheadview (intent);//Set Picture box} break; } super.onactivityresult (Requestcode, ResultCode, intent); /** * Crop the original picture */public void Croprawphoto (Uri uri) {Intent Intent = new Intent ("Com.android.camera.action.CROP"); Inten T.setdataandt

minimum color values are the same, which means gray, then S is defined as 0, and H is undefined and is usually written in the program as 0.Step 5: Otherwise, test L:If lIf l>=0.5, s= (maxcolor-mincolor)/(2.0-maxcolor-mincolor)Step 6: If r=maxcolor, h= (g-b)/(Maxcolor-mincolor)If G=maxcolor, h=2.0+ (b-r)/(Maxcolor-mincolor)If B=maxcolor, h=4.0+ (r-g)/(Maxcolor-mincolor)Step 7: From the calculation of the 6th step, H is divided into the 0~6 area. The RGB color space is a cube and the HSL color sp

Since the Android camera preview data can only be IMAGEFORMAT.NV21 format, so the decoding to go through a turn.Camera Mcamera == mcamera.getparameters ();p. Setpreviewformat (IMAGEFORMAT.NV21); /* This is a unique value or can not be set. Some students may be set to PixelFormat below a value, in fact, is not right, the specific can see the official document */mcamera.setparameters (P); Mcamera.startpreview