I think the documentation is a bit unclear about the fact that "colors"
and "channels" are the same thing here. The line about bits should
probably say "bits is the number of bits for each *channel*".
Mattias
On 06/15/2011 11:11 PM, Nam Gi VU wrote:
Thank you Mattias,
I'll look at `channels` again.
Regards,
Nam
On Thu, Jun 16, 2011 at 1:06 PM, Mattias Thorslund<mattias@xxxxxxxxxxxx>wrote:
On 06/15/2011 10:11 PM, Nam Gi VU wrote:
Hi everyone,
In PHP code, given an .png image path, I need to detect the bit-depth of
that image. How can I do that?
I've tried to use getImageSize() and read the bits as below sample code
but
it always returns '8' for 24-bits/32-bits image.
Reading the manual, it says:
"
channels will be 3 for RGB pictures and 4 for CMYK pictures.
bits is the number of bits for each color.
"
So, to get the total bit depth, I think you need to multiply by the number
of colors, which is in the "channels" element.
Cheers,
Mattias
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