blocks|key|632895|text|我找到了其他的解决办法。这是最好的了。我只使用三星相机sdk。这是非常令人敬畏的，结果比自定义相机要好得多，几乎和本地相机应用程序一样。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|632896|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.samsung.com/galaxy/camera^0|N|7|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

I found other solution. This is the best one. I simply using <a href="http://developer.samsung.com/galaxy/camera" rel="nofollow noreferrer">samsung camera sdk</a>. It is very awesome, and results are much better than custom camera, almost same as native camera app.

blocks|key|21107|text|请看一下CameraView。这是一个定制的相机实现，我认为它会给你一个合适的地方开始。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|21108|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/google/cameraview^0|4|A|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Please have a look at <a href="https://github.com/google/cameraview" rel="nofollow noreferrer" title="CameraView">CameraView</a>.
This is a custom Camera implementation, I think It will give you a proper place to start.

blocks|key|1739607|text|有一个伟大的开放相机应用程序。它是开源的，您可以检查他是如何保存图像的。我觉得你的问题是形象保存。你的图像比原来的小，这就是为什么你的图像质量很低。这是开放的相机网站http://opencamera.sourceforge.net/。开放相机支持摄像头api+1和api+2。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1739608|entityMap|0|LINK|mutability|MUTABLE|url|http://opencamera.sourceforge.net/^0|2B|Y|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

There is this great open camera application. It is open source and you can check how he did image saving. I think your problem is image saving. Your image is so small than original and that's why your image is low quality. Here is open camera website <a href="http://opencamera.sourceforge.net/" rel="nofollow noreferrer">http://opencamera.sourceforge.net/</a> . Open camera support camera api 1 and api 2.

blocks|key|21138|text|以下是使用相机全分辨率的应用程序：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|21139|AndroidManifest.xml|offset|length|style|BOLD|21140|<?xml+version="1.0"+encoding="utf-8"?>
<manifest+package="com.osahub.rachit.highrescamera"
++++++xmlns:android="http://schemas.android.com/apk/res/android">

<uses-permission+android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission+android:name="android.permission.READ_EXTERNAL_STORAGE"/>

<application
++++android:allowBackup="true"
++++android:icon="@mipmap/ic_launcher"
++++android:label="@string/app_name"
++++android:theme="@style/AppTheme">
++++<activity
++++++++android:name=".CameraActivity"
++++++++android:label="@string/app_name">
++++++++<intent-filter>
++++++++++++<action+android:name="android.intent.action.MAIN"/>

++++++++++++<category+android:name="android.intent.category.LAUNCHER"/>
++++++++</intent-filter>
++++</activity>
</application>|code-block|syntax|javascript|21141|​|21142|CameraActivity.java|21143|package+com.osahub.rachit.highrescamera;

import+android.content.Intent;
import+android.graphics.Bitmap;
import+android.graphics.Matrix;
import+android.net.Uri;
import+android.os.Bundle;
import+android.os.Environment;
import+android.provider.MediaStore;
import+android.support.v4.view.MenuItemCompat;
import+android.support.v7.app.AppCompatActivity;
import+android.support.v7.widget.ShareActionProvider;
import+android.view.Menu;
import+android.view.MenuItem;
import+android.view.View;
import+android.widget.Button;
import+android.widget.ImageView;

import+java.io.File;

public+class+CameraActivity+extends+AppCompatActivity+{

++++ImageView+image;
++++Button+camera;
++++Uri+imageUri;
++++private+String+folderPath+=+Environment.getExternalStorageDirectory()
++++++++.getPath()+%2B+"/CameraActivity/images";
++++private+File+file;

++++private+ShareActionProvider+mShareActionProvider;

++++@Override
++++protected+void+onCreate(Bundle+savedInstanceState)+{
++++++++super.onCreate(savedInstanceState);
++++++++setContentView(R.layout.activity_camera);
++++++++camera+=+(Button)+findViewById(R.id.camera);
++++++++image+=+(ImageView)+findViewById(R.id.image);
++++++++File+folder+=+new+File(folderPath);
++++++++folder.mkdirs();

++++++++file+=+new+File(folder.getPath()+%2B+"/image.jpg");
++++++++camera.setOnClickListener(new+View.OnClickListener()+{
++++++++++++@Override
++++++++++++public+void+onClick(View+v)+{
++++++++++++++++imageUri+=+Uri.fromFile(file);
++++++++++++++++Intent+intent+=+new+Intent(MediaStore.ACTION_IMAGE_CAPTURE);
++++++++++++++++intent.putExtra(MediaStore.EXTRA_OUTPUT,+imageUri);
++++++++++++++++startActivityForResult(intent,+10);
++++++++++++}
++++++++});
++++}

++++@Override
++++protected+void+onActivityResult(int+requestCode,+int+resultCode,+Intent+data)+{
++++++++super.onActivityResult(requestCode,+resultCode,+data);
++++++++try+{
++++++++++++Bitmap+bp+=+MediaStore.Images.Media.getBitmap(this.getContentResolver(),+imageUri);
++++++++++++Matrix+rotateMatrix+=+new+Matrix();
++++++++++++rotateMatrix.postRotate(90);
++++++++++++Bitmap+rotatedBitmap+=+Bitmap.createBitmap(bp,+0,+0,+bp.getWidth(),
++++++++++++++++bp.getHeight(),+rotateMatrix,+false);
++++++++++++camera.setVisibility(View.GONE);
++++++++++++image.setImageBitmap(rotatedBitmap);
++++++++++++setShareIntent(createShareIntent());
++++++++}+catch+(Exception+e)+{
++++++++++++e.printStackTrace();
++++++++}
++++}

++++@Override
++++public+boolean+onCreateOptionsMenu(Menu+menu)+{
++++++++//+Inflate+the+menu;+this+adds+items+to+the+action+bar+if+it+is+present.
++++++++getMenuInflater().inflate(R.menu.menu_camera,+menu);

++++++++MenuItem+item+=+menu.findItem(R.id.action_share);
++++++++mShareActionProvider+=+(ShareActionProvider)+MenuItemCompat.getActionProvider(item);

++++++++setShareIntent(createShareIntent());
++++++++return+true;
++++}

++++private+void+setShareIntent(Intent+shareIntent)+{
++++++++if+(mShareActionProvider+!=+null)+{
++++++++++++mShareActionProvider.setShareIntent(shareIntent);
++++++++}
++++}

++++private+Intent+createShareIntent()+{
++++++++Intent+shareIntent+=+new+Intent();
++++++++shareIntent.setAction(Intent.ACTION_SEND);
++++++++shareIntent.putExtra(Intent.EXTRA_STREAM,+imageUri);
++++++++shareIntent.setType("image/*");
++++++++return+shareIntent;
++++}
}|21144|activity_camera.xml|21145|<RelativeLayout+xmlns:android="http://schemas.android.com/apk/res/android"
++++++++++++++++xmlns:tools="http://schemas.android.com/tools"
++++++++++++++++android:layout_width="match_parent"
++++++++++++++++android:layout_height="match_parent"
++++++++++++++++android:paddingBottom="@dimen/activity_vertical_margin"
++++++++++++++++android:paddingLeft="@dimen/activity_horizontal_margin"
++++++++++++++++android:paddingRight="@dimen/activity_horizontal_margin"
++++++++++++++++android:paddingTop="@dimen/activity_vertical_margin"
++++++++++++++++tools:context=".CameraActivity">

++++<Button
++++++++android:id="@%2Bid/camera"
++++++++android:layout_width="wrap_content"
++++++++android:layout_height="wrap_content"
++++++++android:layout_alignParentTop="true"
++++++++android:layout_centerHorizontal="true"
++++++++android:text="@string/open_camera"/>

++++<ImageView
++++++++android:id="@%2Bid/image"
++++++++android:layout_width="wrap_content"
++++++++android:layout_height="wrap_content"
++++++++android:layout_alignParentBottom="true"
++++++++android:layout_alignParentEnd="true"
++++++++android:layout_alignParentLeft="true"
++++++++android:layout_alignParentRight="true"
++++++++android:layout_alignParentStart="true"
++++++++android:layout_alignTop="@%2Bid/camera"
++++++++android:contentDescription="@string/image_description"/>
</RelativeLayout>|21146|entityMap^0|0|0|J|0|0|0|0|J|0|0|0|J|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@$D|10|E|11|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|12|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|13|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|14|8|@$D|15|E|16|F|G]]|9|@]|A|$]]|$1|Q|3|R|5|J|7|17|8|@]|9|@]|A|$K|L]]|$1|S|3|T|5|6|7|18|8|@$D|19|E|1A|F|G]]|9|@]|A|$]]|$1|U|3|V|5|J|7|1B|8|@]|9|@]|A|$K|L]]|$1|W|3|-4|5|6|7|1C|8|@]|9|@]|A|$]]]|X|$]]

Here is the app for using the full resolution of your camera:

AndroidManifest.xml

<pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
&lt;manifest package="com.osahub.rachit.highrescamera"
 xmlns:android="http://schemas.android.com/apk/res/android"&gt;

&lt;uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/&gt;
&lt;uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/&gt;

&lt;application
 android:allowBackup="true"
 android:icon="@mipmap/ic_launcher"
 android:label="@string/app_name"
 android:theme="@style/AppTheme"&gt;
 &lt;activity
 android:name=".CameraActivity"
 android:label="@string/app_name"&gt;
 &lt;intent-filter&gt;
 &lt;action android:name="android.intent.action.MAIN"/&gt;

 &lt;category android:name="android.intent.category.LAUNCHER"/&gt;
 &lt;/intent-filter&gt;
 &lt;/activity&gt;
&lt;/application&gt;
</code></pre>



CameraActivity.java

<pre><code>package com.osahub.rachit.highrescamera;

import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Matrix;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.v4.view.MenuItemCompat;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.ShareActionProvider;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

import java.io.File;

public class CameraActivity extends AppCompatActivity {

 ImageView image;
 Button camera;
 Uri imageUri;
 private String folderPath = Environment.getExternalStorageDirectory()
 .getPath() + "/CameraActivity/images";
 private File file;

 private ShareActionProvider mShareActionProvider;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_camera);
 camera = (Button) findViewById(R.id.camera);
 image = (ImageView) findViewById(R.id.image);
 File folder = new File(folderPath);
 folder.mkdirs();

 file = new File(folder.getPath() + "/image.jpg");
 camera.setOnClickListener(new View.OnClickListener() {
 @Override
 public void onClick(View v) {
 imageUri = Uri.fromFile(file);
 Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
 intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
 startActivityForResult(intent, 10);
 }
 });
 }

 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 super.onActivityResult(requestCode, resultCode, data);
 try {
 Bitmap bp = MediaStore.Images.Media.getBitmap(this.getContentResolver(), imageUri);
 Matrix rotateMatrix = new Matrix();
 rotateMatrix.postRotate(90);
 Bitmap rotatedBitmap = Bitmap.createBitmap(bp, 0, 0, bp.getWidth(),
 bp.getHeight(), rotateMatrix, false);
 camera.setVisibility(View.GONE);
 image.setImageBitmap(rotatedBitmap);
 setShareIntent(createShareIntent());
 } catch (Exception e) {
 e.printStackTrace();
 }
 }

 @Override
 public boolean onCreateOptionsMenu(Menu menu) {
 // Inflate the menu; this adds items to the action bar if it is present.
 getMenuInflater().inflate(R.menu.menu_camera, menu);

 MenuItem item = menu.findItem(R.id.action_share);
 mShareActionProvider = (ShareActionProvider) MenuItemCompat.getActionProvider(item);

 setShareIntent(createShareIntent());
 return true;
 }

 private void setShareIntent(Intent shareIntent) {
 if (mShareActionProvider != null) {
 mShareActionProvider.setShareIntent(shareIntent);
 }
 }

 private Intent createShareIntent() {
 Intent shareIntent = new Intent();
 shareIntent.setAction(Intent.ACTION_SEND);
 shareIntent.putExtra(Intent.EXTRA_STREAM, imageUri);
 shareIntent.setType("image/*");
 return shareIntent;
 }
}
</code></pre>

activity_camera.xml

<pre><code>&lt;RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:paddingBottom="@dimen/activity_vertical_margin"
 android:paddingLeft="@dimen/activity_horizontal_margin"
 android:paddingRight="@dimen/activity_horizontal_margin"
 android:paddingTop="@dimen/activity_vertical_margin"
 tools:context=".CameraActivity"&gt;

 &lt;Button
 android:id="@+id/camera"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_alignParentTop="true"
 android:layout_centerHorizontal="true"
 android:text="@string/open_camera"/&gt;

 &lt;ImageView
 android:id="@+id/image"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:layout_alignParentBottom="true"
 android:layout_alignParentEnd="true"
 android:layout_alignParentLeft="true"
 android:layout_alignParentRight="true"
 android:layout_alignParentStart="true"
 android:layout_alignTop="@+id/camera"
 android:contentDescription="@string/image_description"/&gt;
&lt;/RelativeLayout&gt;
</code></pre>

blocks|key|1739621|text|经过一些研究我找到了解决办法。这个github代码对我帮助很大：https://github.com/webjb/myrobot|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1739622|我用YUV_420_888格式从相机中获取图像，并使用NDK将其字节缓冲区传递给opencv，并且opencv保存为jpeg。|1739623|质量高，文件大小超过2MB！|1739624|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/webjb/myrobot^0|W|W|0|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@$A|Q|B|R|1|S]]|C|$]]|$1|D|3|E|5|6|7|T|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|C|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]]]

After some research I found solution.
This github code helped me a lot: <a href="https://github.com/webjb/myrobot" rel="nofollow noreferrer">https://github.com/webjb/myrobot</a> 

I am taking image from camera with YUV_420_888 format and passing its byte buffer to opencv using NDK, and opencv saves as jpeg. 

Quality is high and file size is more than 2MB!

blocks|key|1739696|text|一个快速的解决方案是，您可以使用Camera+Parameters只设置方向，但不设置图像的高度和宽度。就像这样。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1739697|if+(this.getResources().getConfiguration().orientation!=+Configuration.ORIENTATION_LANDSCAPE)+{
++++params.set("orientation","portrait");
++++camera.setDisplayOrientation(90);
++++params.setRotation(90);
}+else+{
++++params.set("orientation","landscape");
++++camera.setDisplayOrientation(0);
++++params.setRotation(0);
}
//+params.setPictureSize(msize.width,msize.height);
camera.setParameters(params);`|code-block|syntax|javascript|1739698|我得到了这个职位的关键帮助。|1739699|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/39741777/image-quality-is-poor-using-custom-camera?rq=1^0|G|H|0|0|4|4|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|Y|8|@]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|M|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

The one quick solution is that you can use <code>Camera Parameters</code> to set only orientation but not set the height and width of the image. Like this.
<pre><code>if (this.getResources().getConfiguration().orientation!= Configuration.ORIENTATION_LANDSCAPE) {
 params.set(&quot;orientation&quot;,&quot;portrait&quot;);
 camera.setDisplayOrientation(90);
 params.setRotation(90);
} else {
 params.set(&quot;orientation&quot;,&quot;landscape&quot;);
 camera.setDisplayOrientation(0);
 params.setRotation(0);
}
// params.setPictureSize(msize.width,msize.height);
camera.setParameters(params);`
</code></pre>
I got the key help from <a href="https://stackoverflow.com/questions/39741777/image-quality-is-poor-using-custom-camera?rq=1">this post</a>.

My custom camera result image quality is poor comparing to system camera using camera2 api. 

My app is based on Camera2Basic example.
and all modes are set to auto and using the largest available size.

JPEG Results:

Custom Camera: 3984x2988, 630KB

Native Camera: 3984x2988, 2.73MB

All the open source examples have almost same output. Is there any way to get better output?
Any help would be appreciated!

Why is custom camera image quality not as high as system camera?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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与使用camera2 api的系统相机相比，我的自定义相机结果图像质量较差。我的应用程序是基于Camera2Basic示例的。所有模式都设置为自动，并使用最大的可用大小。JPEG结果：自定义相机: 3984x2988,630本机相机: 3984x2988，2.73MB所有的开源示例都有几乎相同的输出。有什么办法可以得到更好的产出吗？任何帮助都将不胜感激！

问为什么定制相机的图像质量不像系统摄像机那么高？
EN

回答 6

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问为什么定制相机的图像质量不像系统摄像机那么高？EN

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