[Numpy-discussion] look for value, depending to y position

[ioannis syntychakis]

Hallo everybody

maybe somebody can help with the following:

i'm using numpy and pil to find objects in a grayscale image. I make an
array of the image and then i look for pixels with the value above the 230.
Then i convert the array to image and i see my objects.

What i want is to make the grayscale depented to the place on th image.

the image is 500 to 500 pixels.

and for example i want that the pixelvalue the program is looking for
decreases in the y direction.

on position y= 0 to 100 the programm is looking  for pixelvalues above the
250
 on position y= 100 to 200 the programm is looking  for pixelvalues above
the 230
 on position y= 200 to 300 the programm is looking  for pixelvalues above
the 210
 on position y= 400 to 500the programm is looking  for pixelvalues above the
190

is this possible?

thanks in advance.

greetings, Jannis
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