了解使用colormatrix和colormatrixcolorfilter修改可绘制的色调
https://stackoverflow.com/questions/4354939
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08-10-2019 - |
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我正在为应用程序使用UI，并且正在尝试使用灰度图标，并允许用户将主题更改为他们选择的颜色。为此，我试图只应用某种形式的色彩来覆盖可绘制的颜色。我已经尝试使用porterduff.mode.moultiply，它几乎完全按照我的需要工作，除了白人也覆盖了颜色。我理想地寻找的是Photoshop中“颜色”混合模式之类的东西，图形保留其透明度和发光度，仅修改图像的颜色。例如：
变成 
在进行了一些研究之后，看来Colormatrixcolorfilter类可能会做我需要的事情，但是我似乎找不到任何指向矩阵如何使用的资源。这是一个4x5矩阵，但我需要知道的是我如何设计矩阵。有任何想法吗？
编辑：好吧，我到目前为止发现的内容如下：
1 0 0 0 0 //red
0 1 0 0 0 //green
0 0 1 0 0 //blue
0 0 0 1 0 //alpha
该矩阵是身份矩阵（应用时，不进行更改），数字范围为0到1（浮点）。该矩阵将与每个像素乘以转换为新颜色。因此，这就是它开始对我来说变得模糊的地方。因此，我认为每个像素将是包含argb值的1 x 4向量（例如 0.2, 0.5, 0.8, 1）可以用转换矩阵点缀。因此，要使图像的红色强度加倍，您将使用矩阵，例如：
2 0 0 0 0
0 1 0 0 0
0 0 1 0 0
0 0 0 1 0
这将为您提供一个矢量（颜色） 0.4, 0.5, 0.8, 1. 。从有限的测试中，情况似乎就是这样，并且工作正常，但实际上我仍然遇到了同样的问题（即白人获得着色）。进一步的阅读告诉我，这是因为它在RGB值上进行转换，而对于色相变化，应首先将值转换为HSL值。因此，我可能可以编写一个可以读取图像并转换颜色的类，并用新颜色重新绘制图像。这会给statelistDrawableS创建另一个问题，因为我不确定如何将每个内容用于代码并修改所有这些问题，以及它的过程速度有多慢。 ：//
嗯，好吧，所以我想我要有的另一个问题是，矩阵是否可以用于使用Luminosity信息，例如L一个B还是HSL？如果是这样，我可以将矩阵乘以该转换，然后对该矩阵进行调整，然后将该矩阵应用于ColorFilter。
解决方案
这就是我在游戏中使用的东西。这是网站上各种文章中发现的各个部分的汇编。积分是@See链接的原始作者。请注意，彩色矩阵可以完成更多操作。包括反转等...
public class ColorFilterGenerator
{
/**
* Creates a HUE ajustment ColorFilter
* @see http://groups.google.com/group/android-developers/browse_thread/thread/9e215c83c3819953
* @see http://gskinner.com/blog/archives/2007/12/colormatrix_cla.html
* @param value degrees to shift the hue.
* @return
*/
public static ColorFilter adjustHue( float value )
{
ColorMatrix cm = new ColorMatrix();
adjustHue(cm, value);
return new ColorMatrixColorFilter(cm);
}
/**
* @see http://groups.google.com/group/android-developers/browse_thread/thread/9e215c83c3819953
* @see http://gskinner.com/blog/archives/2007/12/colormatrix_cla.html
* @param cm
* @param value
*/
public static void adjustHue(ColorMatrix cm, float value)
{
value = cleanValue(value, 180f) / 180f * (float) Math.PI;
if (value == 0)
{
return;
}
float cosVal = (float) Math.cos(value);
float sinVal = (float) Math.sin(value);
float lumR = 0.213f;
float lumG = 0.715f;
float lumB = 0.072f;
float[] mat = new float[]
{
lumR + cosVal * (1 - lumR) + sinVal * (-lumR), lumG + cosVal * (-lumG) + sinVal * (-lumG), lumB + cosVal * (-lumB) + sinVal * (1 - lumB), 0, 0,
lumR + cosVal * (-lumR) + sinVal * (0.143f), lumG + cosVal * (1 - lumG) + sinVal * (0.140f), lumB + cosVal * (-lumB) + sinVal * (-0.283f), 0, 0,
lumR + cosVal * (-lumR) + sinVal * (-(1 - lumR)), lumG + cosVal * (-lumG) + sinVal * (lumG), lumB + cosVal * (1 - lumB) + sinVal * (lumB), 0, 0,
0f, 0f, 0f, 1f, 0f,
0f, 0f, 0f, 0f, 1f };
cm.postConcat(new ColorMatrix(mat));
}
protected static float cleanValue(float p_val, float p_limit)
{
return Math.min(p_limit, Math.max(-p_limit, p_val));
}
}
为了完成此操作，我应该添加一个示例：
ImageView Sun = (ImageView)findViewById(R.id.sun);
Sun.setColorFilter(ColorFilterGenerator.adjustHue(162)); // 162 degree rotation
其他提示
如果要调整明亮，对比度，饱和度和色相，这是完整的代码。享受！非常感谢@richardlalancette
public class ColorFilterGenerator {
private static double DELTA_INDEX[] = {
0, 0.01, 0.02, 0.04, 0.05, 0.06, 0.07, 0.08, 0.1, 0.11,
0.12, 0.14, 0.15, 0.16, 0.17, 0.18, 0.20, 0.21, 0.22, 0.24,
0.25, 0.27, 0.28, 0.30, 0.32, 0.34, 0.36, 0.38, 0.40, 0.42,
0.44, 0.46, 0.48, 0.5, 0.53, 0.56, 0.59, 0.62, 0.65, 0.68,
0.71, 0.74, 0.77, 0.80, 0.83, 0.86, 0.89, 0.92, 0.95, 0.98,
1.0, 1.06, 1.12, 1.18, 1.24, 1.30, 1.36, 1.42, 1.48, 1.54,
1.60, 1.66, 1.72, 1.78, 1.84, 1.90, 1.96, 2.0, 2.12, 2.25,
2.37, 2.50, 2.62, 2.75, 2.87, 3.0, 3.2, 3.4, 3.6, 3.8,
4.0, 4.3, 4.7, 4.9, 5.0, 5.5, 6.0, 6.5, 6.8, 7.0,
7.3, 7.5, 7.8, 8.0, 8.4, 8.7, 9.0, 9.4, 9.6, 9.8,
10.0
};
/**
* @see http://groups.google.com/group/android-developers/browse_thread/thread/9e215c83c3819953
* @see http://gskinner.com/blog/archives/2007/12/colormatrix_cla.html
* @param cm
* @param value
*/
public static void adjustHue(ColorMatrix cm, float value)
{
value = cleanValue(value, 180f) / 180f * (float) Math.PI;
if (value == 0){
return;
}
float cosVal = (float) Math.cos(value);
float sinVal = (float) Math.sin(value);
float lumR = 0.213f;
float lumG = 0.715f;
float lumB = 0.072f;
float[] mat = new float[]
{
lumR + cosVal * (1 - lumR) + sinVal * (-lumR), lumG + cosVal * (-lumG) + sinVal * (-lumG), lumB + cosVal * (-lumB) + sinVal * (1 - lumB), 0, 0,
lumR + cosVal * (-lumR) + sinVal * (0.143f), lumG + cosVal * (1 - lumG) + sinVal * (0.140f), lumB + cosVal * (-lumB) + sinVal * (-0.283f), 0, 0,
lumR + cosVal * (-lumR) + sinVal * (-(1 - lumR)), lumG + cosVal * (-lumG) + sinVal * (lumG), lumB + cosVal * (1 - lumB) + sinVal * (lumB), 0, 0,
0f, 0f, 0f, 1f, 0f,
0f, 0f, 0f, 0f, 1f };
cm.postConcat(new ColorMatrix(mat));
}
public static void adjustBrightness(ColorMatrix cm, float value) {
value = cleanValue(value,100);
if (value == 0) {
return;
}
float[] mat = new float[]
{
1,0,0,0,value,
0,1,0,0,value,
0,0,1,0,value,
0,0,0,1,0,
0,0,0,0,1
};
cm.postConcat(new ColorMatrix(mat));
}
public static void adjustContrast(ColorMatrix cm, int value) {
value = (int)cleanValue(value,100);
if (value == 0) {
return;
}
float x;
if (value < 0) {
x = 127 + (float) value / 100*127;
} else {
x = value % 1;
if (x == 0) {
x = (float)DELTA_INDEX[value];
} else {
//x = DELTA_INDEX[(p_val<<0)]; // this is how the IDE does it.
x = (float)DELTA_INDEX[(value<<0)]*(1-x) + (float)DELTA_INDEX[(value<<0)+1] * x; // use linear interpolation for more granularity.
}
x = x*127+127;
}
float[] mat = new float[]
{
x/127,0,0,0, 0.5f*(127-x),
0,x/127,0,0, 0.5f*(127-x),
0,0,x/127,0, 0.5f*(127-x),
0,0,0,1,0,
0,0,0,0,1
};
cm.postConcat(new ColorMatrix(mat));
}
public static void adjustSaturation(ColorMatrix cm, float value) {
value = cleanValue(value,100);
if (value == 0) {
return;
}
float x = 1+((value > 0) ? 3 * value / 100 : value / 100);
float lumR = 0.3086f;
float lumG = 0.6094f;
float lumB = 0.0820f;
float[] mat = new float[]
{
lumR*(1-x)+x,lumG*(1-x),lumB*(1-x),0,0,
lumR*(1-x),lumG*(1-x)+x,lumB*(1-x),0,0,
lumR*(1-x),lumG*(1-x),lumB*(1-x)+x,0,0,
0,0,0,1,0,
0,0,0,0,1
};
cm.postConcat(new ColorMatrix(mat));
}
protected static float cleanValue(float p_val, float p_limit)
{
return Math.min(p_limit, Math.max(-p_limit, p_val));
}
public static ColorFilter adjustColor(int brightness, int contrast, int saturation, int hue){
ColorMatrix cm = new ColorMatrix();
adjustHue(cm, hue);
adjustContrast(cm, contrast);
adjustBrightness(cm, brightness);
adjustSaturation(cm, saturation);
return new ColorMatrixColorFilter(cm);
}
}
对于任何对如何使用ColormatrixColorFilter感兴趣的人。我在这里使用的示例，在画布上绘制位图时将每个像素转换为红色。
班上的评论来自： http://developer.android.com/reference/android/graphics/colormatrix.html 这为您提供了一些有关此操作的见解
@Override
protected void onDraw(Canvas canvas) {
// The matrix is stored in a single array, and its treated as follows: [ a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t ]
// When applied to a color [r, g, b, a], the resulting color is computed as (after clamping) ;
// R' = a*R + b*G + c*B + d*A + e;
// G' = f*R + g*G + h*B + i*A + j;
// B' = k*R + l*G + m*B + n*A + o;
// A' = p*R + q*G + r*B + s*A + t;
Paint paint = new Paint();
float[] matrix = {
1, 1, 1, 1, 1, //red
0, 0, 0, 0, 0, //green
0, 0, 0, 0, 0, //blue
1, 1, 1, 1, 1 //alpha
};
paint.setColorFilter(new ColorMatrixColorFilter(matrix));
Rect source = new Rect(0, 0, 100, 100);
Rect dest = new Rect(0, 0, 100, 100);
Bitmap bitmap = BitmapFactory.decodeResource(context.getResources(), R.drawable.sampleimage);
canvas.drawBitmap(bitmap , source, dest, paint);
}
以下课程是对已经发布的答案的改进。这使阅读和创建更容易 ColorFilter 来自 Bitmap.
示例用法：
ImageView imageView = ...;
Drawable drawable = imageView.getDrawable();
ColorFilter colorFilter = ColorFilterGenerator.from(drawable).to(Color.RED);
imageView.setColorFilter(colorFilter);
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.ColorFilter;
import android.graphics.ColorMatrix;
import android.graphics.ColorMatrixColorFilter;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.PictureDrawable;
import android.widget.ImageView;
/**
* Creates a {@link ColorMatrixColorFilter} to adjust the hue, saturation, brightness, or
* contrast of an {@link Bitmap}, {@link Drawable}, or {@link ImageView}.
* <p/>
* Example usage:
* <br/>
* {@code imageView.setColorFilter(ColorFilterGenerator.from(Color.BLUE).to(Color.RED));}
*
* @author Jared Rummler <jared.rummler@gmail.com>
*/
public class ColorFilterGenerator {
// Based off answer from StackOverflow
// See: http://stackoverflow.com/a/15119089/1048340
private ColorFilterGenerator() {
throw new AssertionError();
}
public static From from(Drawable drawable) {
return new From(drawableToBitmap(drawable));
}
public static From from(Bitmap bitmap) {
return new From(bitmap);
}
public static From from(int color) {
return new From(color);
}
// --------------------------------------------------------------------------------------------
private static final double DELTA_INDEX[] = {
0, 0.01, 0.02, 0.04, 0.05, 0.06, 0.07, 0.08, 0.1, 0.11, 0.12, 0.14, 0.15, 0.16, 0.17, 0.18,
0.20, 0.21, 0.22, 0.24, 0.25, 0.27, 0.28, 0.30, 0.32, 0.34, 0.36, 0.38, 0.40, 0.42, 0.44,
0.46, 0.48, 0.5, 0.53, 0.56, 0.59, 0.62, 0.65, 0.68, 0.71, 0.74, 0.77, 0.80, 0.83, 0.86, 0.89,
0.92, 0.95, 0.98, 1.0, 1.06, 1.12, 1.18, 1.24, 1.30, 1.36, 1.42, 1.48, 1.54, 1.60, 1.66, 1.72,
1.78, 1.84, 1.90, 1.96, 2.0, 2.12, 2.25, 2.37, 2.50, 2.62, 2.75, 2.87, 3.0, 3.2, 3.4, 3.6,
3.8, 4.0, 4.3, 4.7, 4.9, 5.0, 5.5, 6.0, 6.5, 6.8, 7.0, 7.3, 7.5, 7.8, 8.0, 8.4, 8.7, 9.0, 9.4,
9.6, 9.8, 10.0
};
public static void adjustHue(ColorMatrix cm, float value) {
value = cleanValue(value, 180f) / 180f * (float) Math.PI;
if (value == 0) {
return;
}
float cosVal = (float) Math.cos(value);
float sinVal = (float) Math.sin(value);
float lumR = 0.213f;
float lumG = 0.715f;
float lumB = 0.072f;
float[] mat = new float[]{
lumR + cosVal * (1 - lumR) + sinVal * (-lumR),
lumG + cosVal * (-lumG) + sinVal * (-lumG),
lumB + cosVal * (-lumB) + sinVal * (1 - lumB), 0, 0,
lumR + cosVal * (-lumR) + sinVal * (0.143f),
lumG + cosVal * (1 - lumG) + sinVal * (0.140f),
lumB + cosVal * (-lumB) + sinVal * (-0.283f), 0, 0,
lumR + cosVal * (-lumR) + sinVal * (-(1 - lumR)),
lumG + cosVal * (-lumG) + sinVal * (lumG),
lumB + cosVal * (1 - lumB) + sinVal * (lumB), 0, 0, 0f, 0f, 0f, 1f, 0f, 0f, 0f, 0f,
0f, 1f
};
cm.postConcat(new ColorMatrix(mat));
}
public static void adjustBrightness(ColorMatrix cm, float value) {
value = cleanValue(value, 100);
if (value == 0) {
return;
}
float[] mat = new float[]{
1, 0, 0, 0, value, 0, 1, 0, 0, value, 0, 0, 1, 0, value, 0, 0, 0, 1, 0, 0, 0, 0, 0,
1
};
cm.postConcat(new ColorMatrix(mat));
}
public static void adjustContrast(ColorMatrix cm, int value) {
value = (int) cleanValue(value, 100);
if (value == 0) {
return;
}
float x;
if (value < 0) {
x = 127 + value / 100 * 127;
} else {
x = value % 1;
if (x == 0) {
x = (float) DELTA_INDEX[value];
} else {
x = (float) DELTA_INDEX[(value << 0)] * (1 - x)
+ (float) DELTA_INDEX[(value << 0) + 1] * x;
}
x = x * 127 + 127;
}
float[] mat = new float[]{
x / 127, 0, 0, 0, 0.5f * (127 - x), 0, x / 127, 0, 0, 0.5f * (127 - x), 0, 0,
x / 127, 0, 0.5f * (127 - x), 0, 0, 0, 1, 0, 0, 0, 0, 0, 1
};
cm.postConcat(new ColorMatrix(mat));
}
public static void adjustSaturation(ColorMatrix cm, float value) {
value = cleanValue(value, 100);
if (value == 0) {
return;
}
float x = 1 + ((value > 0) ? 3 * value / 100 : value / 100);
float lumR = 0.3086f;
float lumG = 0.6094f;
float lumB = 0.0820f;
float[] mat = new float[]{
lumR * (1 - x) + x, lumG * (1 - x), lumB * (1 - x), 0, 0, lumR * (1 - x),
lumG * (1 - x) + x, lumB * (1 - x), 0, 0, lumR * (1 - x), lumG * (1 - x),
lumB * (1 - x) + x, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1
};
cm.postConcat(new ColorMatrix(mat));
}
// --------------------------------------------------------------------------------------------
private static float cleanValue(float p_val, float p_limit) {
return Math.min(p_limit, Math.max(-p_limit, p_val));
}
private static float[] getHsv(int color) {
float[] hsv = new float[3];
Color.RGBToHSV(Color.red(color), Color.green(color), Color.blue(color), hsv);
return hsv;
}
/**
* Converts a {@link Drawable} to a {@link Bitmap}
*
* @param drawable
* The {@link Drawable} to convert
* @return The converted {@link Bitmap}.
*/
private static Bitmap drawableToBitmap(Drawable drawable) {
if (drawable instanceof BitmapDrawable) {
return ((BitmapDrawable) drawable).getBitmap();
} else if (drawable instanceof PictureDrawable) {
PictureDrawable pictureDrawable = (PictureDrawable) drawable;
Bitmap bitmap = Bitmap.createBitmap(pictureDrawable.getIntrinsicWidth(),
pictureDrawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
canvas.drawPicture(pictureDrawable.getPicture());
return bitmap;
}
int width = drawable.getIntrinsicWidth();
width = width > 0 ? width : 1;
int height = drawable.getIntrinsicHeight();
height = height > 0 ? height : 1;
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
drawable.draw(canvas);
return bitmap;
}
/**
* Calculate the average red, green, blue color values of a bitmap
*
* @param bitmap
* a {@link Bitmap}
* @return
*/
private static int[] getAverageColorRGB(Bitmap bitmap) {
int width = bitmap.getWidth();
int height = bitmap.getHeight();
int size = width * height;
int[] pixels = new int[size];
int r, g, b;
r = g = b = 0;
bitmap.getPixels(pixels, 0, width, 0, 0, width, height);
for (int i = 0; i < size; i++) {
int pixelColor = pixels[i];
if (pixelColor == Color.TRANSPARENT) {
size--;
continue;
}
r += Color.red(pixelColor);
g += Color.green(pixelColor);
b += Color.blue(pixelColor);
}
r /= size;
g /= size;
b /= size;
return new int[]{
r, g, b
};
}
/**
* Calculate the average color value of a bitmap
*
* @param bitmap
* a {@link Bitmap}
* @return
*/
private static int getAverageColor(Bitmap bitmap) {
int[] rgb = getAverageColorRGB(bitmap);
return Color.argb(255, rgb[0], rgb[1], rgb[2]);
}
// Builder
// --------------------------------------------------------------------------------------------
public static final class Builder {
int hue;
int contrast;
int brightness;
int saturation;
public Builder setHue(int hue) {
this.hue = hue;
return this;
}
public Builder setContrast(int contrast) {
this.contrast = contrast;
return this;
}
public Builder setBrightness(int brightness) {
this.brightness = brightness;
return this;
}
public Builder setSaturation(int saturation) {
this.saturation = saturation;
return this;
}
public ColorFilter build() {
ColorMatrix cm = new ColorMatrix();
adjustHue(cm, hue);
adjustContrast(cm, contrast);
adjustBrightness(cm, brightness);
adjustSaturation(cm, saturation);
return new ColorMatrixColorFilter(cm);
}
}
public static final class From {
final int oldColor;
private From(Bitmap bitmap) {
oldColor = getAverageColor(bitmap);
}
private From(int oldColor) {
this.oldColor = oldColor;
}
public ColorFilter to(int newColor) {
float[] hsv1 = getHsv(oldColor);
float[] hsv2 = getHsv(newColor);
int hue = (int) (hsv2[0] - hsv1[0]);
int saturation = (int) (hsv2[1] - hsv1[1]);
int brightness = (int) (hsv2[2] - hsv1[2]);
return new ColorFilterGenerator.Builder()
.setHue(hue)
.setSaturation(saturation)
.setBrightness(brightness)
.build();
}
}
}
色调和RGB之间没有线性关系。色调在60°块中定义了分段（http://en.wikipedia.org/wiki/hsl_color_space#general_appacher），因此HSV和RGB之间没有简单的矩阵转换。要更改图像的色调，您可以使用以下方法：
public Bitmap changeHue( Bitmap source, double hue ) {
Bitmap result = Bitmap.createBitmap( source.getWidth(), source.getHeight(), source.getConfig() );
float[] hsv = new float[3];
for( int x = 0; x < source.getWidth(); x++ ) {
for( int y = 0; y < source.getHeight(); y++ ) {
int c = source.getPixel( x, y );
Color.colorToHSV( c, hsv );
hsv[0] = (float) ((hsv[0] + 360 * hue) % 360);
c = (Color.HSVToColor( hsv ) & 0x00ffffff) | (c & 0xff000000);
result.setPixel( x, y, c );
}
}
return result;
}
我认为这种方法将为您提供您想要的东西：
http://android.okhelp.cz/hue-color-colored-filter-bitmap-imap-image-android-example/
bitmapOrg.setColorFilter(Color.RED, PorterDuff.Mode.MULTIPLY);
像其他答案一样，我使用了颜色矩阵来实现此行为，但是您可以通过常规的Android颜色资源传递。矩阵，将颜色映射到图像值和白色之间的范围。
/**
* Color everything that isn't white, the tint color
* @param tintColor the color to tint the icon
*/
public void setInverseMultiplyFilter(Drawable imgCopy, @ColorInt int tintColor) {
Drawable imgCopy = imageView.getDrawable().getConstantState().newDrawable();
float colorRed = Color.red(tintColor) / 255f;
float colorGreen = Color.green(tintColor) / 255f;
float colorBlue = Color.blue(tintColor) / 255f;
imgCopy.setColorFilter(new ColorMatrixColorFilter(new ColorMatrix(new float[]{
1 - colorRed, 0, 0, 0, colorRed * 255,
0, 1 - colorGreen, 0, 0, colorGreen * 255,
0, 0, 1 - colorBlue, 0, colorBlue * 255,
0, 0, 0, Color.alpha(tintColor) / 255f, 0,
})));
imageView.setImageDrawable(imgCopy);
imageView.invalidate();
}
我根据以下片段制作了一些colormatrixfilter测试仪：
private Bitmap setColorFilter(Bitmap drawable) {
Bitmap grayscale = Bitmap.createBitmap(drawable.getWidth(), drawable.getHeight(), drawable.getConfig());
//if(isRenderMode) bOriginal.recycle();
Canvas c = new Canvas(grayscale );
Paint p = new Paint();
final ColorMatrix matrixA = new ColorMatrix();
matrixA.setSaturation(sauturationValue/2);
float[] mx = {
r1Value, r2Value, r3Value, r4Value, r5Value,
g1Value, g2Value, g3Value, g4Value, g5Value,
b1Value, b2Value, b3Value, b4Value, b5Value,
a1Value, a2Value, a3Value, a4Value, a5Value
};
final ColorMatrix matrixB = new ColorMatrix(mx);
matrixA.setConcat(matrixB, matrixA);
final ColorMatrixColorFilter filter = new ColorMatrixColorFilter(matrixA);
p.setColorFilter(filter);
c.drawBitmap(drawable, 0, 0, p);
return grayscale;
}
您可以在此处查看：https://play.google.com/store/apps/details?id=org.vaelostudio.colormatrixtester
即使可以通过使用 ColorMatrix 我个人会考虑使用 ColorMap[] 随着 ImageAttributes. 。通过这样做，我们可以定义应用哪种颜色代替哪些颜色。
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