Trace through the binary image and find the minimum row,maximum row and minimum column and maximum column whose pixel value is non 255

Hello,

I have a binary image, i want trace through the image and find the minimum row,maximum row,minimum column and maximum column whose pixel value is not equal to 255(ie it should be 0) .

I want to get these four coordinates using

find()
I am sending here the binary image for which i want to find the coordinates.
I have marked with red color for the coordinates i want to find.(ie left top coordinates and bottom right coordinates)

Please let me know about this.

Looking forward to hear from you.

Thanks Pankaja