wrong Depth with png format

[Flauzer]

Hi,
I can't convert a jpg image to png, grayscale and 8 bit depth.

Code: Select all

// read from disk...

image.Format = MagickFormat.Png;
...
image.ColorType = ColorType.Grayscale;
image.Depth = 8;
image.Write(FullPathFile);

The result is always 24 bit depth...
I've lost something? where is my mistake? bug?

It seems this https://www.imagemagick.org/discourse-s ... hp?t=27766

Thanks in advance

EDIT.
workaround: ...change image.Format in MagickFormat.Png8.

[dlemstra]

Setting image.Format to MagickFormat.Png8 is not a workaround. This is how you tell the png writer that you want an 8 bit image.