wip: try to find acceptable perf/quality values

- current gives around 20-25%

Signed-off-by: Maksim Sukharev <antreesy.web@gmail.com>

Author: Antreesy

src/utils/media/effects/virtual-background/WebGLCompositor.js

@@ -8,22 +8,22 @@
  * Number of horizontal + vertical blur iterations applied.
  * Larger value - stronger blur effect. Low GPU impact.
  */
-const DEFAULT_BLUR_PASSES = 3
+const DEFAULT_BLUR_PASSES = 2
 /**
  * Spatial radius of the bilateral filter.
  * Larger value - smoother mask over a wider area, softer edges. High GPU impact.
  */
-const SIGMA_SPACE = 10
+const SIGMA_SPACE = 9
 /**
  * Range sensitivity of the bilateral filter.
  * Larger value: more smoothing across edges. Low GPU impact.
  */
-const SIGMA_COLOR = 0.15
+const SIGMA_COLOR = 0.25
 /**
  * Sampling stride scale for the bilateral kernel.
  * Larger value - faster processing, rougher mask refinement. High GPU impact.
  */
-const SPARSITY_FACTOR = 0.66
+const SPARSITY_FACTOR = 0.95
 
 /**
  * WebGL-based compositor for background effects.