Hi, what does this error mean?

Warning: PNG library warning: Incorrect bKGD chunk length. > In readpngutil (line 9) In readpng (line 32) In imread/call_format_specific_reader (line 410) In imread (line 403) In training_imgfildata (line 9)

Answer 1

[Image Analyst]

Looks like some kind of error trying to read in a PNG format file. Unfortunately, even though it is "urgent", you forgot to attach the image file, or the m-file. So I won't get to it until tomorrow. So about all I can suggest now is that your image is corrupt. Can you open it in any other program?

Maybe someone will still be able to answer today, but I suggest you read this link and improve your question and attach your files first.