update readme

README.md

@@ -1,4 +1,4 @@
-![php-excel](https://github.com/viest/php-excel-writer/blob/master/resource/logo.png)
+![php-excel](resource/logo.png)
 
 [![Build Status](https://travis-ci.org/viest/php-ext-excel-export.svg?branch=master)](https://travis-ci.org/viest/php-ext-excel-export)
 [![Build status](https://ci.appveyor.com/api/projects/status/w4cfjo9e4gsrs6rn/branch/master?svg=true)](https://ci.appveyor.com/project/viest/php-ext-excel-export/branch/master)
@@ -13,7 +13,7 @@
 
 Please refer to the image below. PHPExcel has been unable to work properly for memory reasons at 40,000 and 100000 points, but it can be resolved by modifying the ini configuration, but the time may take longer to complete the work;
 
-![php-excel](https://github.com/viest/php-excel-writer/blob/master/resource/performance_comparison.png)
+![php-excel](resource/performance_comparison.png)
 
 xlswriter is a PHP C Extension that can be used to write text, numbers, formulas and hyperlinks to multiple worksheets in an Excel 2007+ XLSX file. It supports features such as:
 
@@ -55,11 +55,11 @@ Test environment: Macbook Pro 13 inch, Intel Core i5, 16GB 2133MHz LPDDR3 Memory
 
 #### PECL Repository
 
-[![pecl](https://github.com/viest/php-excel-writer/blob/master/resource/pecl.png)](https://pecl.php.net/package/xlswriter)
+[![pecl](resource/pecl.png)](https://pecl.php.net/package/xlswriter)
 
 #### Exchange group
 
-<img width="160" src="https://github.com/viest/php-ext-excel-export/blob/dev/resource/qq.jpg"/>
+<img width="160" src="resource/qq.jpg"/>
 
 #### License