Corrupt JPEG data: 36 extraneous bytes before marker 0xd9，opencv获取imread报错方法

错误类型：Corrupt JPEG data: 36 extraneous bytes before marker 0xd9

原因：opencv imread默认有错误直接跳过，不会返回，需要修改源码才能使之报错

① 修改 modules/highgui/src/grfmt_jpeg.cpp 文件，在 error_exit()函数下面添加以下代码：

METHODDEF(void)

output_message( j_common_ptr cinfo )

{

char buffer[JMSG_LENGTH_MAX];

/* Create the message */

(*cinfo->err->format_message) (cinfo, buffer);

/* Default OpenCV error handling instead of print */

CV_Error(CV_StsError, buffer);

}

②在 decoder error handler 添加以上函数的实现：

state->cinfo.err = jpeg_std_error(&state->jerr.pub);

state->jerr.pub.error_exit = error_exit;

state->jerr.pub.output_message = output_message; /* Add this line */

③ 在 encoder error handler 添加以上函数的实现：

cinfo.err = jpeg_std_error(&jerr.pub);

jerr.pub.error_exit = error_exit;

jerr.pub.output_message = output_message; /* Add this line */

④ 修改完后重新编译opencv，在imread错误的jpg文件后会报错了：

>>> cv2.imread("/var/opencv/bad_image.jpg")

OpenCV Error: Unspecified error (Corrupt JPEG data: 1137 extraneous bytes before marker 0xc4) in output_message, file /var/opencv/opencv-2.4.9/modules/highgui/src/grfmt_jpeg.cpp, line 180

Traceback (most recent call last):

File "", line 1, in

cv2.error: /var/opencv/opencv-2.4.9/modules/highgui/src/grfmt_jpeg.cpp:180: error: (-2) Corrupt JPEG data: 1137 extraneous bytes before marker 0xc4 in function output_message

这时，opencv写imread的代码 一定要用 try catch语法：

try{

im = imread( " XXX.jpg" );

}

catch(char *str){

xxx

}

ps:如果linux系统重新装了eigen3，那么编译opencv会报错：

[..]/ modules / contrib / src / rgbdodometry . cpp : 65 : 47 : fatal error : unsupported / Eigen / MatrixFunctions : No such file or directory

解决方法如下：

修改modules/contrib/src/rgbdodometry.cpp代码：

#include / Eigen / MatrixFunctions> 修改为 #include