Posted by
Mauro Maiorca on
Jun 14, 2016; 7:54pm
URL: http://imagej.273.s1.nabble.com/Help-tp5016640p5016646.html
On Tue, Jun 14, 2016 at 5:10 PM, Charles Davis <
[hidden email]> wrote:
>
> I'm using a Nikon D810 camera which produces large files. I need a .csv or
> .txt file w/ the brightness values. I don't want a Histogram, but the data
> behind the Histogram.
>
Dear Charles,
In my understanding you are looking for the histogram values of an image.
If this is the case, you just go to "Analyze->Hitogram" in the menu
(alternatively use CTRL+H) and it will pop up a window with the image
histogram. On that window click on "list" and you have the list of values
(of the histogram) in another window, you can save the values by clicking
"file->save as.." in that window menu. For RGB image in the histogram
window there is a button RGB that gives the values for each single channel
(again, if you want the numbers just click "List").
If you are interested in doing specific analysis for each channel of the
image (i.e. Red, Green or Blue), you can split the channels of the original
RGB image into single grayscale images (Image->Color->Split Channels), and
analyse each channel image independently.
> As I said, I was able to [somehow] create a .txt file that was organized
> differently. I had all the Y's in the rows and all the X's in the columns.
>
you can get this sort of file by saving an image as a text file
("file->Save As->Text Image..."). For RGB images, you might want to split
the channels first (Image->Color->Split Channels) and save each single
channel image as a text file.
Hope it helps,
Mauro
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