Re: Dirty Transparency
Posted: 2010-07-07T13:15:26-07:00
Your file has an alpha channel (for transparency) you can verify that with
identify -verbose 0707cddlogo.png
Image: 0707cddlogo.png
Format: PNG (Portable Network Graphics)
Class: DirectClass
Geometry: 800x415+0+0
Resolution: 72x72
Print size: 11.1111x5.76389
Units: Undefined
Type: TrueColorMatte
Endianess: Undefined
Colorspace: RGB
Depth: 8-bit
Channel depth:
red: 8-bit
green: 8-bit
blue: 8-bit
alpha: 8-bit
Channel statistics:
Red:
min: 38 (0.14902)
max: 255 (1)
mean: 207.422 (0.81342)
standard deviation: 66.3569 (0.260223)
kurtosis: 1.05517
skewness: -1.49206
Green:
min: 129 (0.505882)
max: 255 (1)
mean: 228.515 (0.896135)
standard deviation: 35.5593 (0.139448)
kurtosis: 1.31335
skewness: -1.48454
Blue:
min: 217 (0.85098)
max: 255 (1)
mean: 248.482 (0.974439)
standard deviation: 11.8645 (0.0465276)
kurtosis: 0.567136
skewness: -1.49806
Alpha:
min: 191 (0.74902)
max: 255 (1)
mean: 254.648 (0.998619)
standard deviation: 4.08333 (0.0160131)
kurtosis: 173.238
skewness: 12.8993
identify -verbose 0707cddlogo.png
Image: 0707cddlogo.png
Format: PNG (Portable Network Graphics)
Class: DirectClass
Geometry: 800x415+0+0
Resolution: 72x72
Print size: 11.1111x5.76389
Units: Undefined
Type: TrueColorMatte
Endianess: Undefined
Colorspace: RGB
Depth: 8-bit
Channel depth:
red: 8-bit
green: 8-bit
blue: 8-bit
alpha: 8-bit
Channel statistics:
Red:
min: 38 (0.14902)
max: 255 (1)
mean: 207.422 (0.81342)
standard deviation: 66.3569 (0.260223)
kurtosis: 1.05517
skewness: -1.49206
Green:
min: 129 (0.505882)
max: 255 (1)
mean: 228.515 (0.896135)
standard deviation: 35.5593 (0.139448)
kurtosis: 1.31335
skewness: -1.48454
Blue:
min: 217 (0.85098)
max: 255 (1)
mean: 248.482 (0.974439)
standard deviation: 11.8645 (0.0465276)
kurtosis: 0.567136
skewness: -1.49806
Alpha:
min: 191 (0.74902)
max: 255 (1)
mean: 254.648 (0.998619)
standard deviation: 4.08333 (0.0160131)
kurtosis: 173.238
skewness: 12.8993