"Empty page" when trying to make box file of .tiff

[IBalic]

Hi,

I am trying to train tesseract for some digits I am taking pictures of.

The picture is originally in JPG-format, and I convert them to .TIFF with ImageMagick. I actually have several photos that I do this procedure with.

When I am doing: "tesseract <pic> <box-prefix> batch.nochop makebox"

I get "Empty page!!"-error, and no box-file is generated. I have other pictures that are almost identical (just other digits), and they work. I guess around 3/10 pictures fail with this error. 

The picture is attached, and I hope some of you are able to help me. 

[Federico D'Ignazio]

Is ok to "Up" this? I've got a really similar problem, with small images