http://imagej.273.s1.nabble.com/Thresholder-in-headless-macro-mode-results-in-NullPointerException-tp5009940p5009947.html
> I want to change the rgb values of a single pixel.
>
> I believe changeValues(v1, v2, v3); changes the values of all pixels within a certain range.
>
> Thanks,
> Frank
>
>
>>>> Herbie <
[hidden email]> 10/7/2014 11:52 AM >>>
> Frank Shaffer,
>
> is this
>
> "changeValues(v1, v2, v3);
> Changes pixels in the image or selection that have a value in the range
> v1-v2 to v3. For example, changeValues(0,5,5) changes all pixels less
> than 5 to 5, and changeValues(0x0000ff,0x0000ff,0xff0000) changes all
> blue pixels in an RGB image to red."
>
> ImageJ-macro command, what you are looking for?
>
> For more macro commands have a look at:
>
> <
http://rsb.info.nih.gov/ij/developer/macro/functions.html>
>
> HTH
>
> Herbie
>
> :::::::::::::::::::::::::::::::::::::::::
> On 07.10.14 17:44, Franklin Shaffer wrote:
>> I'm reading values of color pixel from an image and converting the hex value to color values to r, g , b.
>>
>> I want to change the r,g,b values then write the new values to the pixel from a macro.
>>
>> I can make it work with the Fill tool, but it is extremely slow.
>>
>> Is there a better way to change the value of a color pixel from a macro?
>>
>> Thanks,
>> Frank Shaffer
>>
>>
>> Senior Research Engineer
>> USDOE National Energy Technology Laboratory
>> Office of Research & Development
>> Mail Stop 84-202
>> 626 Cochran's Mill Road
>> Pittsburgh, PA 15236
>>
>>
[hidden email]
>> Office: 412-386-5964
>> Cell: 724-970-7262
>>
>> --
>> ImageJ mailing list:
http://imagej.nih.gov/ij/list.html>>
>
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