[gdal-dev] how to get pixel vlaue of specific color

[Chaitanya kumar CH]

Vajram,

There is no way to refer the pixel value by a color. In fact, a color
can be assigned to muliple pixel values.

You will have to iterate throuh the color entries to look for your color.

On 6/23/10, mail2vajram <mail2vajram at gmail.com> wrote:
>
> My image having pixel values between 0 to 8(classified image). The following
> code is used to read the colors of the image. Here i want know the pixel
> value of the specific color.
>
> Band band = ds.GetRasterBand(1);
>             ColorTable ct = band.GetRasterColorTable();
>
>             for (int i = 0; i < ct.GetCount(); i++)
>             {
>                 ColorEntry ce = ct.GetColorEntry(i);
>                 Color cr1 = Color.FromArgb(ce.c4, ce.c1, ce.c2, ce.c3);
>
>             }
>
> suppose here i am getting yellow, brown,blue,.......i want to know pixel
> value of the image where yellow color is located, like this brown,blue
> etc...............
>
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Best regards,
Chaitanya kumar CH.
/tʃaɪθənjə/ /kʊmɑr/
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