init README of deepdoc, add picture processer. (#71)

* init README of deepdoc, add picture processer.

* add resume parsing

deepdoc/README.md

@@ -0,0 +1,82 @@
+English | [简体中文](./README_zh.md)
+
+#*Deep*Doc
+
+---
+
+- [1. Introduction](#1)
+- [2. Vision](#2)
+- [3. Parser](#3)
+
+<a name="1"></a>
+## 1. Introduction
+
+---
+With a bunch of documents from various domains with various formats and along with diverse retrieval requirements, 
+an accurate analysis becomes a very challenge task. *Deep*Doc is born for that purpose.
+There 2 parts in *Deep*Doc so far: vision and parser.
+
+<a name="2"></a>
+## 2. Vision
+
+---
+
+We use vision information to resolve problems as human being.
+  - OCR. Since a lot of documents presented as images or at least be able to transform to image, 
+    OCR is a very essential and fundamental or even universal solution for text extraction.
+    
+    <div align="center" style="margin-top:20px;margin-bottom:20px;">
+    <img src="https://lh6.googleusercontent.com/2xdiSjaGWkZ71YdORc71Ujf7jCHmO6G-6ONklzGiUYEh3QZpjPo6MQ9eqEFX20am_cdW4Ck0YRraXEetXWnM08kJd99yhik13Cy0_YKUAq2zVGR15LzkovRAmK9iT4o3hcJ8dTpspaJKUwt6R4gN7So" width="300"/>
+    </div>
+
+  - Layout recognition. Documents from different domain may have various layouts, 
+    like, newspaper, magazine, book and résumé are distinct in terms of layout. 
+    Only when machine have an accurate layout analysis, it can decide if these text parts are successive or not, 
+    or this part needs Table Structure Recognition(TSR) to process, or this part is a figure and described with this caption.
+    We have 10 basic layout components which covers most cases:
+      - Text
+      - Title
+      - Figure
+      - Figure caption
+      - Table
+      - Table caption
+      - Header
+      - Footer
+      - Reference
+      - Equation
+    <div align="center" style="margin-top:20px;margin-bottom:20px;">
+    <img src="https://github.com/PaddlePaddle/PaddleOCR/blob/release/2.7/ppstructure/docs/layout/layout.png?raw=true" width="900"/>
+    </div>
+  
+  - Table Structure Recognition(TSR). Data table is a frequently used structure present data including numbers or text.
+    And the structure of a table might be very complex, like hierarchy headers, spanning cells and projected row headers.
+    Along with TSR, we also reassemble the content into sentences which could be well comprehended by LLM. 
+    We have five labels for TSR task:
+      - Column
+      - Row
+      - Column header
+      - Projected row header
+      - Spanning cell
+    <div align="center" style="margin-top:20px;margin-bottom:20px;">
+    <img src="https://user-images.githubusercontent.com/10793386/139559159-cd23c972-8731-48ed-91df-f3f27e9f4d79.jpg" width="900"/>
+    </div>
+        
+<a name="3"></a>
+## 3. Parser
+
+---
+
+Four kinds of document formats as PDF, DOCX, EXCEL and PPT have their corresponding parser. 
+The most complex one is PDF parser since PDF's flexibility. The output of PDF parser includes:
+  - Text chunks with their own positions in PDF(page number and rectangular positions).
+  - Tables with cropped image from the PDF, and contents which has already translated into natural language sentences.
+  - Figures with caption and text in the figures.
+  
+###Résumé
+
+---
+The résumé is a very complicated kind of document. A résumé which is composed of unstructured text 
+with various layouts could be resolved into structured data composed of nearly a hundred of fields.
+We haven't opened the parser yet, as we open the processing method after parsing procedure.
+
+