Downloads

• Executable JAR of the offline tester
• Source code of the offline tester

In order to use the offline tester / visualizer tool for testing your solution locally, you'll have to modify your solution by adding the main method that interacts with the tester / visualizer via reading data from standard input and writing data to standard output. As long as you do not change the implementation of method ROI_Finder this doesn't affect the way your solution works when being submitted to our server.

To simulate a single test case, your program should implement the following protocol (each integer is to be read from / printed in a separate line):

• Read integer N.
• Read N integers: imageData[0], imageData[1], ..., imageData[N-1]
• Read integer Rows.
• Read integer Columns.
• Call result = ROI_Finder(imageData, Row, Columns)
• Print the size M of the result vector and flush the standard output stream.
• Print integers result[0], result[1], ..., result[M-1]. Flush the standard output stream.

In other words, you should implement the following pseudocode in the main method of your solution:

    N = parseInt(readLine())    
    for (i=0; i < N; i++)
        imageData[i] = readInt()
    Rows = parseInt(readLine())    
    Columns = parseInt(readLine())    
    
    results = ROI_Finder(imageData, Rows, Columns);
    printLine(length(results))
    flush(stdout)      

    for (i=0;i < length(results); i++)
        printLine(results[i])
    flush(stdout)      

The tester can be run as follows.

java -jar tester.jar -folder <folder> -test <testcase file> -gtf <ground truth file> -exec <exec command> -vis <output image> -seed <test number>

<command> is the command you would use to execute your solution. If your compiled solution is an executable file, the command will just be the full path to it, for example, "C:\TopCoder\solution.exe" or "~/topcoder/solution".

Additionally you can use the following parameters:

• -seed <seed>. Sets the seed used for test case generation. Default value is 1.
• -folder <folder>. The folder in which the test images are stored. Default values is empty.
• -test <testcase file>. The testcase file contains a list of all the images to be used as testcases.
• -gtf <ground truth file>. The ground truth file contains a list with all the true barcode regions in each image.
• -vis <output image>. Optional. The image will be saved with ground truth regions displayed in green and your returned regions in red or blue. Regions will be drawn in blue if they significantly overlapped the ground truth region.

Final notes

You can print any debug information of your solution to the standard error stream and it will be forwarded to the standard output of the tester.

For more information on using visualizers, please check the following recipe draft from TopCoder Cookbook. Note that this is not a troubleshooting thread, please use the match forum for questions instead.