JPEG find the Colorspace

[qwertywin]

Hi,

I've been running around in circles trying to workout where ImageMagick gets the colorspace of a JPEG from, I know there must be somewhere in the metadata, but I can't for the life of me find it and traversing the IM source is not as easy as I thought it would be

any help would be great

I know that when you do an identify -verbose you get a couple of colorspace related info

1) Type: <colorspace>

from Properties:
1) exif:ColorSpace: -1 <-- this is useless unforunately
2) jpeg:colorspace: 1 <-- either this or the previously mentioned "Type" seem to be what im looking for but i can't find the tag it is referreing to.

[snibgo]

It might come from the JPEG SPIFF "Colorspace" tag:

0 = Bi-level
1 = YCbCr, ITU-R BT 709, video
2 = No color space specified
3 = YCbCr, ITU-R BT 601-1, RGB
4 = YCbCr, ITU-R BT 601-1, video
8 = Gray-scale
9 = PhotoYCC
10 = RGB
11 = CMY
12 = CMYK
13 = YCCK
14 = CIELab