In Part One Here in my Blog i described a quick fix to improving picture quality that required the knowledge of a developer. Today, If u dont have the knowledge of writting android application then you are saved because snapit has moved to another level. Here is the repo
1.Just install Snapit to your Device by downloading snapit from the repo and then extracting the archive there by getting snapit.apk app from the extracted file.
2. Launch ODK Collect and when answering image question, make snapit as your default camera app.