I’m in my
OPENCV_ROOT folder and running the following command in Win-x64:
opencv_createsamples -bgcolor 0 -bgthresh 0 -maxxangle 1.1 -maxyangle 1.1 maxzangle 0.5 -maxidev 40 -w 80 -h 40 -img ABSOLUTE_PATH_TO_POSITIVE_IMAGES_FOLDER\car.jpg -bg ABSOLUTE_PATH_TO_PROJECT\negatives.txt -vec ABSOLUTE_PATH_TO_SAMPLES_FOLDER\car.jpg.vec -num 125
negatives.txt looks like this:
negative_images\city01_02.jpg negative_images\city01_04.jpg negative_images\city01_05.jpg negative_images\city01_06.jpg negative_images\city01_07.jpg
This is my output:
Info file name: (NULL) Img file name: ABSOLUTE_PATH_TO_POSITIVE_IMAGES_FOLDER\car.jpg Vec file name: ABSOLUTE_PATH_TO_SAMPLES_FOLDER\car.jpg.vec BG file name: ABSOLUTE_PATH_TO_PROJECT\negatives.txt Num: 125 BG color: 0 BG threshold: 0 Invert: FALSE Max intensity deviation: 40 Max x angle: 1.1 Max y angle: 1.1 Max z angle: 0.5 Show samples: FALSE Width: 80 Height: 40 Create training samples from single image applying distortions... Invalid background description file.
What’s invalid about my negatives collection file (
negatives.txt)? I tried listing the files within it both with absolute paths and with relative paths. I’m following this tutorial.
Problem solved! The issue was simply that I had written the collection file names in Notepad++, and it all seemed fine. But when I happened to open the same file in notepad, I noticed there were no newlines after each image filename! When I added the newlines, and ran the command, the samples got created without errors!
Answered By – user961627
Answer Checked By – Clifford M. (AngularFixing Volunteer)