[magick-users] Brightest Pixel Location

[Fred Weinhaus]

Proper convert syntax has the input image right after "convert"

convert input  ...options...  output


It looks to me that you have too many outputs. What is photo1.jpg?  I 
assume photo.jpg is your input and photo.txt is the text file.

I am not sure you are not getting everything output to your text file 
and not just the values that match. I am no expert on unix to tell 
you how to get this output to a file. I tried and have not come up 
with a good solution, yet.

But with regard to limiting your search to the center. You can do 
that as follows:

convert rose: -gravity center -crop 40x40+0+0 -type Grayscale -fx 
"u==1?debug(u):1; u" null:

this gives you a search only in the center 40x40 region




>Hello Fred,
>That seems to do the trick regarding Brightest Pixel as I am able to pull
>out the intended data to use in quite a few places in the application.  I am
>currently dumping the pixel values to a file then searching and storing
>values from that point.
>
>I am currently using:
>
>convert -type Grayscale -fx "u==1?debug(u):1; u" photo.jpg photo.txt
>photo1.jpg
>
>I am now attempting to limit my pixel dump to the center of the image, I
>imagine I can do this by giving a rad value and performing the search from
>that point.