How to scale a high - resolution image to a low - resolution one?

[wangwenfeng0]

Description

#PoseLandmarkerRunner.cs
_textureFramePool = new Experimental.TextureFramePool(imageSource.textureWidth, imageSource.textureHeight, TextureFormat.RGBA32, 10);
// NOTE: we can share the GL context of the render thread with MediaPipe (for now, only on Android)
var canUseGpuImage = options.baseOptions.delegateCase == Tasks.Core.BaseOptions.Delegate.GPU &&
SystemInfo.graphicsDeviceType == GraphicsDeviceType.OpenGLES3 &&
GpuManager.GpuResources != null;
using var glContext = canUseGpuImage ? GpuManager.GetGlContext() : null;

  while (true)
  {
    if (isPaused)
    {
      yield return new WaitWhile(() => isPaused);
    }

    if (!_textureFramePool.TryGetTextureFrame(out var textureFrame))
    {
      yield return new WaitForEndOfFrame();
      continue;
    }

    // Build the input Image
    Image image;
    
    if (canUseGpuImage)
    {
      yield return new WaitForEndOfFrame();
      textureFrame.ReadTextureOnGPU(imageSource.GetCurrentTexture(), flipHorizontally, flipVertically);
      image = textureFrame.BuildGpuImage(glContext);
    }
    else
    {   
      req = textureFrame.ReadTextureAsync(imageSource.GetCurrentTexture(), flipHorizontally, flipVertically);
      yield return waitUntilReqDone;

      if (req.hasError)
      {
        Debug.LogError($"Failed to read texture from the image source, exiting...");
        break;
      }
                
      image = textureFrame.BuildCPUImage();
      textureFrame.Release();
    }

When I get the "Image image" data, how can I resize the image to reduce computational time consumption while keeping the input image at a high resolution.
thank you very much.

[homuler]

I think generating an Image instance based on downscaled pixel data (= downscale it by yourself) would be a straightforward approach, but if you can modify the MediaPipe CalculatorGraph, it should be also possible to downscale the image using the ImageTransformationCalculator or GlScalerCalculator.

[wangwenfeng0]

The new version of 0.10.20 Assets Package will be released soon?