Rephrase abstract of face detection tutorial

Author: sebromero

content/tutorials/portenta-h7/por-openmv-fd/content.md

@@ -1,5 +1,5 @@
 # Creating a Basic Face Filter With OpenMV
-In this tutorial you will build a MicroPython application with OpenMV that uses the Portenta Vision Shield to detect faces and overlay them with a custom image, in this case, a smiley. Think of it as building your own camera filter that puts a smile on every face it detects. This tutorial is based on the face detection example that comes with the OpenMV IDE.
+In this tutorial you will build a MicroPython application with OpenMV that uses the Portenta Vision Shield to detect faces and overlay them with a custom bitmap image. Think of it as building your own camera filter that puts a smile on every face it detects. This tutorial is based on the face detection example that comes with the OpenMV IDE.
 
 ## What You Will Learn
 - How to use the OpenMV IDE to run MicroPython on Portenta

content/tutorials/portenta-h7/por-openmv-fd/metadata.json

@@ -17,7 +17,7 @@
       "Machine Vision",
       "Machine Learning"
    ],
-   "abstract":"In this tutorial you will build a MicroPython application with OpenMV that uses the Portenta Vision Shield to detect faces and overlay them with a custom image, in this case, a smiley.",
+   "abstract":"In this tutorial you will build a MicroPython application with OpenMV that uses the Portenta Vision Shield to detect faces and overlay them with a custom bitmap image.",
    "previousArticle":"por-ard-bl",
    "nextArticle":null
 }