Enhancement: Introducing real-time Encoding/Decoding for NetGear API

[abhiTronix]

Description

This PR introduces Encoding/Decoding compression capabilities for NetGear API for optimizing performance while sending the frames of large size directly over the network by encoding the frame before sending it and decoding it on the client's end automatically all in real-time. To achieve this NetGear API utilizes OpenCV's imencode & imdecode functions in conjunction with its flexible APIs and robustly handles all errors

Features:

• added compression support with on-the-fly flexible frame encoding on the server-side
• added initial support for JPEG, PNG & BMP encoding formats
• added exclusive options attribute compression_format & compression_param to tweak this feature
• client-side will now decode frame automatically based on the encoding as well as support decoding flags.
• Updated docs
• Minor fixes(removed redundant import from PiGear)

Requirements / Checklist

• Read the Contributing Guidelines
• Read the FAQ
• Comprehended the Wiki Documentation
• Updated the source-code documentation accordingly(if required).

Related Issue

#65

Context

This PR helps to achieve better control over the quality of the frame being sent over the network and thereby helps in optimizing the performance at cost quality. Thereby the user can now specify the format and other parameters (such as compression level, compression type) for the outgoing frame easily through new compression_format & compression_param attributes and client have the capability to handle decoding automatically.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Screenshots (if available):

None