how can we add hair color like this about makeup

[DingProg]

这个头条换颜色，其实就是给原来的头发，上一层颜色而已，那么第一就需要有头发的精准区域。然后就可以参考画粉底或者口红的算法LipDraw，画上一层颜色即可。

参考部分代码如下，（不包含识别代码）

public class HairColorDraw {

   public static void draw(Canvas canvas, Path hairPath, int color, int alpha, List<MakeupHairColorAdjustUtils.PathEntity> list) {
       if (hairPath == null) return;
       if (color == -1) return;
       alpha = (int) (alpha * 0.8f + 0.5f);
       //Bitmap mask = createMask(new Path(hairPath), color, position, alpha, 8);
       drawAdjustHairColor(canvas, new Path(hairPath), color, alpha, list);
   }

   private static void drawAdjustHairColor(Canvas canvas, Path hairPath,int color, int alpha, List<MakeupHairColorAdjustUtils.PathEntity> list) {
       Paint paint = new Paint();
       canvas.saveLayerAlpha(0, 0, canvas.getWidth(), canvas.getHeight(),alpha , Canvas.ALL_SAVE_FLAG);
       paint.setStyle(Paint.Style.FILL);
       paint.setMaskFilter(new BlurMaskFilter(8, BlurMaskFilter.Blur.NORMAL));
       paint.setColor(color);
       canvas.drawPath(hairPath,paint);
       if (list == null || list.isEmpty()) {
           canvas.restore();
           return;
       }
       paint.setColor(color);
       paint.setStyle(Paint.Style.STROKE);
       paint.setAntiAlias(true);
       paint.setDither(true);
       paint.setFilterBitmap(true);
       paint.setStrokeWidth(15);
       paint.setStrokeJoin(Paint.Join.ROUND);
       paint.setStrokeCap(Paint.Cap.ROUND);

       for (MakeupHairColorAdjustUtils.PathEntity pathEntity : list) {
           paint.setStrokeWidth(pathEntity.paintSize);
           if(pathEntity.isEraserPath){
               paint.setColor(Color.TRANSPARENT);
               paint.setMaskFilter(null);
           }else{
               paint.setColor(color);
               paint.setMaskFilter(new BlurMaskFilter(8, BlurMaskFilter.Blur.NORMAL));
           }
           paint.setXfermode(pathEntity.isEraserPath ?  new PorterDuffXfermode(PorterDuff.Mode.SRC_OUT)
                   : new PorterDuffXfermode(PorterDuff.Mode.DST_OVER));
           canvas.drawPath(pathEntity.path,paint);
       }
       canvas.restore();
   }

   private static Bitmap createMask(final Path path, int color, @Nullable PointF position, int alpha, int blur_radius) {
       if (path == null || path.isEmpty())
           return null;

       RectF bounds = new RectF();
       path.computeBounds(bounds, true);

       int width = (int) bounds.width();
       int height = (int) bounds.height();
       if (width == 0 || height == 0) return null;
       Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);  // mutable
       Canvas canvas = new Canvas(bitmap);
       canvas.drawColor(Color.TRANSPARENT);
       Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
       paint.setMaskFilter(new BlurMaskFilter(blur_radius, BlurMaskFilter.Blur.NORMAL));
       paint.setColor(color);
       paint.setAlpha(alpha);
       paint.setStyle(Paint.Style.FILL);
       path.offset(-bounds.left, -bounds.top);
       canvas.drawPath(path, paint);
       if (position != null) {
           position.x = bounds.left;
           position.y = bounds.top;
       }
       return bitmap;
   }
}

[pawaom]

thanks for your reply but my problem is how can we find the "precise area of ​​hair"

i found another code

https://github.com/crownyoung0303/Hairstyle-Simulation

however it uses NDK , can you please include this in your project with pre build ".SO" files

can you please help with this

thanks

[DingProg]

本Project 仅仅是Demo，不是实际可使用的Project。 目前暂时没时间，考虑去做这么一个功能。

推荐的方式，你识别到目标区域，上颜色就OK。识别区域暂时也不是我研究的范围，所以很抱歉！暂时不会提供支持。