Android图像处理（一）色调、饱和度、亮度

来源：互联网发布：破解福利软件分享编辑：程序博客网时间：2024/05/08 00:05

色调

ColorMatrix hueMatrix = new ColorMatrix();

hueMatrix.setRotate(0, hue); 0-代表R

hueMatrix.setRotate(1, hue); 1-代表G

hueMatrix.setRotate(2, hue); 2-代表B

饱和度

ColorMatrix saturationMatrix = new ColorMatrix();

saturationMatrix.setSaturation(saturation);

亮度

ColorMatrix lumMatrix = new ColorMatrix();

lumMatrix.setScale(lum, lum, lum, 1);

public class PrimaryColor extends Activity implements SeekBar.OnSeekBarChangeListener {    private ImageView mImageView;    private SeekBar mSeekbarhue, mSeekbarSaturation, mSeekbarLum;    private static int MAX_VALUE = 255;    private static int MID_VALUE = 127;    private float mHue, mSaturation, mLum;    private Bitmap bitmap;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.primary_color);        bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.test3);        mImageView = (ImageView) findViewById(R.id.imageView);        mSeekbarhue = (SeekBar) findViewById(R.id.seekbarHue);        mSeekbarSaturation = (SeekBar) findViewById(R.id.seekbarSaturation);        mSeekbarLum = (SeekBar) findViewById(R.id.seekbarLum);        mSeekbarhue.setOnSeekBarChangeListener(this);        mSeekbarSaturation.setOnSeekBarChangeListener(this);        mSeekbarLum.setOnSeekBarChangeListener(this);        mSeekbarhue.setMax(MAX_VALUE);        mSeekbarSaturation.setMax(MAX_VALUE);        mSeekbarLum.setMax(MAX_VALUE);        mSeekbarhue.setProgress(MID_VALUE);        mSeekbarSaturation.setProgress(MID_VALUE);        mSeekbarLum.setProgress(MID_VALUE);        mImageView.setImageBitmap(bitmap);    }    @Override    public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {        switch (seekBar.getId()) {            case R.id.seekbarHue:                //色调                mHue = (progress - MID_VALUE) * 1.0F / MID_VALUE * 180;                break;            case R.id.seekbarSaturation:                //饱和度                mSaturation = progress * 1.0F / MID_VALUE;                break;            case R.id.seekbarLum:                //亮度                mLum = progress * 1.0F / MID_VALUE;                break;        }        mImageView.setImageBitmap(ImageHelper.handleImageEffect(bitmap, mHue, mSaturation, mLum));    }    @Override    public void onStartTrackingTouch(SeekBar seekBar) {    }    @Override    public void onStopTrackingTouch(SeekBar seekBar) {    }}

实现步骤

1.实现静态方法

2.创建Bitmap对象

3.创建画笔对象

4.调整图像效果

5.返回图像

public class ImageHelper {    /**     *     * @param bm 图像 （不可修改）     * @param hue 色相     * @param saturation 饱和度     * @param lum 亮度     * @return     */    public static Bitmap handleImageEffect(Bitmap bm, float hue, float saturation, floatlum) {        Bitmap bmp = Bitmap.createBitmap(bm.getWidth(), bm.getHeight(), Bitmap.Config.ARGB_8888);        Canvas canvas = new Canvas(bmp);        Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);        ColorMatrix hueMatrix = new ColorMatrix();        hueMatrix.setRotate(0, hue); // R        hueMatrix.setRotate(1, hue); // G        hueMatrix.setRotate(2, hue); // B        ColorMatrix saturationMatrix = new ColorMatrix();        saturationMatrix.setSaturation(saturation);        ColorMatrix lumMatrix = new ColorMatrix();        lumMatrix.setScale(lum, lum, lum, 1);        //融合        ColorMatrix imageMatrix = new ColorMatrix();        imageMatrix.postConcat(hueMatrix);        imageMatrix.postConcat(saturationMatrix);        imageMatrix.postConcat(lumMatrix);        paint.setColorFilter(new ColorMatrixColorFilter(imageMatrix));        canvas.drawBitmap(bm, 0, 0, paint);        return bmp;    }}

xml代码中设置控件的监听事件，在Button标签里设置onClick属性调用需要执行的方法，该方法：

访问权限必须是public类型

必须无返回值

方法名要与xml定义方法名相同

参数列表必须是View类型的参数

图像处理，其实就是研究不同的颜色矩阵对图像的处理效果

public class ColorMatrix extends Activity {    private ImageView mImageView;    private GridLayout mGroup;    private Bitmap bitmap;    private int mEtWidth, mEtHeight;    private EditText[] mEts = new EditText[20];    //对应颜色矩阵    private float[] mColorMatrix = new float[20];    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.color_matrix);        bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.test1);        mImageView = (ImageView) findViewById(R.id.imageView);        mGroup = (GridLayout) findViewById(R.id.group);        mImageView.setImageBitmap(bitmap);        //为什么我的代码中自动优化成Lambda表达式了？？？ = =        mGroup.post(new Runnable() {            @Override            public void run() {                //控件绘制完成后再去获取宽高                //若直接在onCreate中去获取                //则会得到两个0                //绘制后执行                mEtWidth = mGroup.getWidth() / 5;                mEtHeight = mGroup.getHeight() / 5;                addEts();                initMatrix();//赋值            }        });    }    private void getMatrix() {        for (int i = 0; i < 20; i++) {            mColorMatrix[i] = Float.valueOf(mEts[i].getText().toString());        }    }    private void setImageMatrix() {        Bitmap bmp = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);        android.graphics.ColorMatrix colorMatrix = new android.graphics.ColorMatrix();        colorMatrix.set(mColorMatrix);        Canvas canvas = new Canvas(bmp);        Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);        paint.setColorFilter(new ColorMatrixColorFilter(colorMatrix));        canvas.drawBitmap(bitmap, 0, 0, paint);        mImageView.setImageBitmap(bmp);    }    public void btnChange(View view) {        getMatrix();        setImageMatrix();    }    public void btnReset(View view) {        initMatrix();        getMatrix();        setImageMatrix();    }    private void addEts() {        for (int i = 0; i < 20; i++) {            EditText editText = new EditText(ColorMatrix.this);            mEts[i] = editText;            mGroup.addView(editText, mEtWidth, mEtHeight);        }    }    /**     * 初始矩阵     * 4行5列     * 0/6/12/18 为1     * 其余为0     */    private void initMatrix() {        for (int i = 0; i < 20; i++) {            if (i % 6 == 0) {                mEts[i].setText(String.valueOf(1));            } else {                mEts[i].setText(String.valueOf(0));            }        }    }}

怀旧效果

|0.393 0.769 0.189 0 0|

|0.349 0.686 0.168 0 0|

|0.272 0.534 0.131 0 0|

|0 0 0 1 0|

https://github.com/LiuchangDuan/demo

0 0