I have been trying to convert a JPEG image in the sRGB colorspace to one in the YCbCr colorspace using the following command:
mogrify -colorspace YCbCr -depth 24 -size 150x193 image.jpeg
However, the colorspace does not seem to change after executing it. What could be going wrong with this command?
The output of identify -verbose on this image is the following:
Image:
Filename: image.jpeg
Format: JPEG (Joint Photographic Experts Group JFIF format)
Mime type: image/jpeg
Class: DirectClass
Geometry: 150x193+0+0
Resolution: 300x300
Print size: 0.5x0.643333
Units: PixelsPerInch
Colorspace: sRGB
Type: TrueColor
Base type: Undefined
Endianness: Undefined
Depth: 8-bit
Channel depth:
red: 8-bit
green: 8-bit
blue: 8-bit
Channel statistics:
Pixels: 28950
Red:
min: 130 (0.509804)
max: 255 (1)
mean: 251.923 (0.987932)
standard deviation: 8.05183 (0.0315758)
kurtosis: 36.456
skewness: -5.49367
entropy: 0.442837
Green:
min: 118 (0.462745)
max: 204 (0.8)
mean: 159.128 (0.62403)
standard deviation: 9.36402 (0.0367216)
kurtosis: -0.462288
skewness: 0.200554
entropy: 0.78474
Blue:
min: 0 (0)
max: 255 (1)
mean: 189.949 (0.7449)
standard deviation: 94.4421 (0.370361)
kurtosis: -0.32277
skewness: -1.18683
entropy: 0.705024
Image statistics:
Overall:
min: 0 (0)
max: 255 (1)
mean: 200.333 (0.78562)
standard deviation: 37.286 (0.14622)
kurtosis: 1.44763
skewness: -1.33571
entropy: 0.6442
Rendering intent: Perceptual
Gamma: 0.454545
Chromaticity:
red primary: (0.64,0.33)
green primary: (0.3,0.6)
blue primary: (0.15,0.06)
white point: (0.3127,0.329)
Background color: white
Border color: srgb(223,223,223)
Matte color: grey74
Transparent color: black
Interlace: None
Intensity: Undefined
Compose: Over
Page geometry: 150x193+0+0
Dispose: Undefined
Iterations: 0
Compression: JPEG
Quality: 90
Orientation: Undefined
Properties:
date:create: 2022-03-16T23:34:06+00:00
date:modify: 2022-03-16T23:34:06+00:00
jpeg:colorspace: 2
jpeg:sampling-factor: 1x1,1x1,1x1
signature: b2382be8d45c90dbdad1b663e64566a32876f1ec0f8f10a74f2f4632932e4c4d
Artifacts:
filename: image.jpeg
verbose: true
Tainted: False
Filesize: 9058B
Number pixels: 28950
Pixels per second: 27.0576MB
User time: 0.010u
Elapsed time: 0:01.001
Version: ImageMagick 6.9.11-60 Q16 x86_64 2021-01-25 https://imagemagick.org
I am on ImageMagick 6.9.11-60 Q16 x86_64 2021-01-25 running on Ubuntu 21.10.
Thank you in advance,
Joshua
Related
Preamble: I have a list of several thousand jp2 images that I need to quickly check for content. (I have more computer processing time than physical time.) There are several conversion steps that I am planning to take to reduce the file size from 200+k to less than 50k. One of these steps was to resize the image. The original images are all 4k+x2k+ in size. However, when I used graphicmagick's convert command the file size doubled although the new file has smaller dimensions. Less is more! The command I used was convert -resize 1000x1000 myOldFile.jp2 myNewFile.jp2
My question: Why did the file size double and what can I do to decrease the image dimensions while at the same time reducing the file size?
Results:
The result of identify -verbose for both files is as follows.
Old File
Image: myOldFile.jp2
Format: JP2 (JPEG-2000 File Format Syntax)
Mime type: image/jp2
Class: DirectClass
Geometry: 4368x2912+0+0
Units: Undefined
Colorspace: sRGB
Type: TrueColor
Base type: Undefined
Endianess: Undefined
Depth: 8-bit
Channel depth:
red: 8-bit
green: 8-bit
blue: 8-bit
Channel statistics:
Pixels: 12719616
Red:
min: 0 (0)
max: 242 (0.94902)
mean: 161.286 (0.632496)
standard deviation: 83.2707 (0.326552)
kurtosis: -0.933893
skewness: -0.997317
entropy: 0.706322
Green:
min: 0 (0)
max: 232 (0.909804)
mean: 151.98 (0.596001)
standard deviation: 76.5239 (0.300094)
kurtosis: -0.952932
skewness: -0.979073
entropy: 0.729028
Blue:
min: 0 (0)
max: 207 (0.811765)
mean: 122.977 (0.482262)
standard deviation: 63.5478 (0.249207)
kurtosis: -0.9993
skewness: -0.936829
entropy: 0.775844
Image statistics:
Overall:
min: 0 (0)
max: 242 (0.94902)
mean: 145.414 (0.570253)
standard deviation: 74.4475 (0.291951)
kurtosis: -1.06722
skewness: -0.805503
entropy: 0.737065
Rendering intent: Perceptual
Gamma: 0.454545
Chromaticity:
red primary: (0.64,0.33)
green primary: (0.3,0.6)
blue primary: (0.15,0.06)
white point: (0.3127,0.329)
Background color: white
Border color: srgb(223,223,223)
Matte color: grey74
Transparent color: black
Interlace: None
Intensity: Undefined
Compose: Over
Page geometry: 4368x2912+0+0
Dispose: Undefined
Iterations: 0
Compression: JPEG2000
Orientation: Undefined
Properties:
date:create: 2019-08-01T15:14:22-07:00
date:modify: 2009-06-03T13:13:55-07:00
signature: ffd44383040859b7138d337c52e2545e2b49601f949a2bbbdfc7b8592d60360b
Artifacts:
filename: myOldFile.jp2
verbose: true
Tainted: False
Filesize: 268346B
Number pixels: 12.7196M
Pixels per second: 7.43837MB
User time: 1.550u
Elapsed time: 0:02.710
Version: ImageMagick 6.9.9-40 Q16 x86_64 2019-05-16 http://www.imagemagick.org
New File
Image: myNewFile.jp2
Format: JP2 (JPEG-2000 File Format Syntax)
Mime type: image/jp2
Class: DirectClass
Geometry: 1000x667+0+0
Units: Undefined
Colorspace: sRGB
Type: TrueColor
Base type: Undefined
Endianess: Undefined
Depth: 8-bit
Channel depth:
red: 8-bit
green: 8-bit
blue: 8-bit
Channel statistics:
Pixels: 667000
Red:
min: 0 (0)
max: 254 (0.996078)
mean: 160.789 (0.630545)
standard deviation: 83.1402 (0.32604)
kurtosis: -0.923213
skewness: -1.00025
entropy: 0.710373
Green:
min: 2 (0.00784314)
max: 245 (0.960784)
mean: 151.482 (0.594048)
standard deviation: 76.3802 (0.29953)
kurtosis: -0.941261
skewness: -0.981966
entropy: 0.732809
Blue:
min: 0 (0)
max: 221 (0.866667)
mean: 122.48 (0.480313)
standard deviation: 63.3749 (0.248529)
kurtosis: -0.985942
skewness: -0.939624
entropy: 0.777783
Image statistics:
Overall:
min: 0 (0)
max: 254 (0.996078)
mean: 144.917 (0.568302)
standard deviation: 74.2984 (0.291366)
kurtosis: -1.05759
skewness: -0.80746
entropy: 0.740322
Rendering intent: Perceptual
Gamma: 0.454545
Chromaticity:
red primary: (0.64,0.33)
green primary: (0.3,0.6)
blue primary: (0.15,0.06)
white point: (0.3127,0.329)
Background color: white
Border color: srgb(223,223,223)
Matte color: grey74
Transparent color: black
Interlace: None
Intensity: Undefined
Compose: Over
Page geometry: 1000x667+0+0
Dispose: Undefined
Iterations: 0
Compression: JPEG2000
Orientation: Undefined
Properties:
date:create: 2019-08-01T15:40:21-07:00
date:modify: 2019-08-01T15:40:21-07:00
signature: 061752e248846335b5f064c85e83ff71542f7ddd55f5327cf146b8aacd685285
Artifacts:
filename: myNewFile.jp2
verbose: true
Tainted: False
Filesize: 511396B
Number pixels: 667000
Pixels per second: 4.16875MB
User time: 0.160u
Elapsed time: 0:01.160
Version: ImageMagick 6.9.9-40 Q16 x86_64 2019-05-16 http://www.imagemagick.org
I tried to convert an image jpg file to binary image, I mean, only B&W colors.
I run convert -monochromatic in.jpg out.jpg and the result is visually satisfactory.
Then I tried to check if the image really contains only B&W colors. So I run identify -verbose out.jpg and the result was too long.
But the main part I'd like to show here is the following:
Type: Grayscale
Colorspace: Gray
Depth: 8-bit
Channel depth:
gray: 8-bit
Channel statistics:
Pixels: 3978000
Gray:
min: 0 (0)
max: 255 (1)
mean: 188.613 (0.739659)
standard deviation: 111.739 (0.438194)
kurtosis: -0.804836
skewness: -1.0932
Colors: 12
Histogram:
883301: ( 0, 0, 0) #000000 gray(0)
109638: ( 1, 1, 1) #010101 gray(1)
35348: ( 2, 2, 2) #020202 gray(2)
6126: ( 3, 3, 3) #030303 gray(3)
570: ( 4, 4, 4) #040404 gray(4)
30: ( 5, 5, 5) #050505 gray(5)
36: (250,250,250) #FAFAFA gray(250)
980: (251,251,251) #FBFBFB gray(251)
10689: (252,252,252) #FCFCFC gray(252)
64396: (253,253,253) #FDFDFD gray(253)
195093: (254,254,254) #FEFEFE gray(254)
2671793: (255,255,255) #FFFFFF gray(255)
So what is strange to me is the Colors: 12 line. Does it mean that the image is not B&W? Should it be only 2?
Edit: based on answer below, the command should be convert -threshold and the important part from identify info is Channel.
But even with this last option, I get 8-bit not 1-bit.
Depth: 8-bit
Channel depth:
gray: 8-bit
Monochromatic colors are all the colors (tints, tones, and shades) of a single hue. So monochromatic does not mean binary image.
You convert a colored image to a binary image using thresholding and obviously you need to give a threshold value to determine what values will be 1(white), what values will be 0(black). By calling values I mean the value term in HSV(hue-saturation-value). We can call it lightness also.
So you can achieve this task by:
convert colored.png -threshold 75% thres_colored.png
computer-158675_1280.png
Command:
identify -verbose computer-158675_1280.png
Result:
Image: computer-158675_1280.png
Format: PNG (Portable Network Graphics)
Mime type: image/png
Class: DirectClass
Geometry: 1280x1046+0+0
Units: Undefined
Type: TrueColorAlpha
Endianess: Undefined
Colorspace: sRGB
Depth: 8-bit
Channel depth:
red: 8-bit
green: 8-bit
blue: 8-bit
alpha: 8-bit
Convert it to a binary image:
convert computer-158675_1280.png -threshold 75% binary.png
binary.png
Command:
identify -verbose binary.png
Result:
Image: binary.png
Format: PNG (Portable Network Graphics)
Mime type: image/png
Class: DirectClass
Geometry: 1280x1046+0+0
Units: Undefined
Type: Bilevel
Endianess: Undefined
Colorspace: Gray
Depth: 8-bit
Channel depth:
gray: 1-bit
alpha: 8-bit
Eventually, the criteria for checking a binary image is not Colors: part but the Channel depth: part. gray: 1-bit means binary image in here.
I try to get verbose information about a part of an image. I read the doc of imageMagick and as far as I understand it, it should be possible to call identify with the -extract option. But, when I call it, I got an error message:
'unrecognized option: -extract'.
This is my commandline call identify -verbose -extract 20x20+0+20 ./mosaicTemplate.jpg
Does anyone knows, what is wrong with my commandline Call or has an convenient workaround?
Thanks in advance!
Simon
Create a test image like this:
convert -size 500x500 gradient:red-blue image.png
Now check details of top left corner where image is pretty red:
convert image.png -crop 20x20+0+0 -verbose info:
Image: image.png
Format: PNG (Portable Network Graphics)
Mime type: image/png
Class: DirectClass
Geometry: 20x20+0+0
Units: Undefined
Type: Palette
Endianess: Undefined
Colorspace: sRGB
Depth: 16-bit
Channel depth:
red: 16-bit
green: 1-bit
blue: 16-bit
Channel statistics:
Pixels: 400
Red:
min: 63040 (0.961929)
max: 65535 (1)
mean: 64287.3 (0.980962) <--- very red
standard deviation: 757.295 (0.0115556)
kurtosis: -1.20609
skewness: 0.000125086
entropy: 1
Green:
min: 0 (0)
max: 0 (0)
mean: 0 (0)
standard deviation: 0 (0)
kurtosis: 0
skewness: 0
entropy: nan
Blue:
min: 0 (0)
max: 2495 (0.0380713)
mean: 1247.65 (0.0190379) <--- not very blue
standard deviation: 757.295 (0.0115556)
kurtosis: -1.20609
skewness: -0.000125086
entropy: 1
Now check details of bottom left corner where it is more blue:
convert image.png -crop 20x20+0+480 -verbose info:
Image: image.png
Format: PNG (Portable Network Graphics)
Mime type: image/png
Class: DirectClass
Geometry: 20x20+0+0
Units: Undefined
Type: Palette
Endianess: Undefined
Colorspace: sRGB
Depth: 16-bit
Channel depth:
red: 16-bit
green: 1-bit
blue: 16-bit
Channel statistics:
Pixels: 400
Red:
min: 0 (0)
max: 2495 (0.0380713)
mean: 1247.65 (0.0190379) <--- not very red
standard deviation: 757.295 (0.0115556)
kurtosis: -1.20609
skewness: -0.000125086
entropy: 1
Green:
min: 0 (0)
max: 0 (0)
mean: 0 (0)
standard deviation: 0 (0)
kurtosis: 0
skewness: 0
entropy: nan
Blue:
min: 63040 (0.961929)
max: 65535 (1)
mean: 64287.3 (0.980962) <--- very blue
standard deviation: 757.295 (0.0115556)
kurtosis: -1.20609
skewness: 0.000125086
entropy: 1
I have been trying to convert an tif image to an eps image keeping the original resolution for days. But without success. The problem is that imagemagick always sets the resolution of the eps image to 72 dpi regardless of using the density and resize command before or after the input file.
The input file can be downloaded, for example I tried following imagemagick command (all of them without the desirable result):
convert -density 300 input.TIF -profile "ISOcoated_v2_eci.icc" eps3:output.EPS
convert -density 300 input.TIF -profile "ISOcoated_v2_eci.icc" -geometry 2835x3780 eps3:output.eps
convert -density 300 input.TIF -profile "ISOcoated_v2_eci.icc" -resize 2835x3780 eps3:output.eps
What is wrong on my conversion? I just need an output eps image with the the resolution of 300 dpi as the input tif file.
Added: identify of output.eps
Image: output.eps
Format: PAM (Common 2-dimensional bitmap format)
Mime type: image/x-portable-pixmap
Class: DirectClass
Geometry: 680x907+0+0
Resolution: 72x72
Print size: 9.44444x12.5972
Units: Undefined
Type: ColorSeparation
Base type: ColorSeparation
Endianess: Undefined
Colorspace: CMYK
Depth: 16/8-bit
Channel depth:
cyan: 8-bit
magenta: 8-bit
yellow: 8-bit
black: 8-bit
Channel statistics:
Pixels: 616760
Cyan:
min: 0 (0)
max: 65535 (1)
mean: 8034.92 (0.122605)
standard deviation: 16075.5 (0.245296)
kurtosis: 3.34548
skewness: 2.18869
Magenta:
min: 0 (0)
max: 63993 (0.976471)
mean: 6431.6 (0.0981399)
standard deviation: 13251.7 (0.202209)
kurtosis: 4.41467
skewness: 2.36107
Yellow:
min: 0 (0)
max: 62965 (0.960784)
mean: 3296.53 (0.0503018)
standard deviation: 8665.27 (0.132224)
kurtosis: 11.9555
skewness: 3.37656
Black:
min: 0 (0)
max: 61166 (0.933333)
mean: 3413.91 (0.052093)
standard deviation: 10294.1 (0.157078)
kurtosis: 10.6052
skewness: 3.33169
Image statistics:
Overall:
min: 0 (0)
max: 65535 (1)
mean: 5294.24 (0.0807849)
standard deviation: 12400.4 (0.189219)
kurtosis: 7.42941
skewness: 2.89771
Total ink density: 324.706%
Rendering intent: Perceptual
Gamma: 0.454545
Chromaticity:
red primary: (0.64,0.33)
green primary: (0.3,0.6)
blue primary: (0.15,0.06)
white point: (0.3127,0.329)
Background color: cmyk(255,255,255,0)
Border color: cmyk(223,223,223,0)
Matte color: cmyk(189,189,189,0)
Transparent color: cmyk(0,0,0,0)
Interlace: None
Intensity: Undefined
Compose: Over
Page geometry: 680x907+0+0
Dispose: Undefined
Iterations: 0
Compression: Undefined
Orientation: Undefined
Properties:
date:create: 2015-09-09T10:21:04+02:00
date:modify: 2015-09-09T10:21:04+02:00
ps:HiResBoundingBox: 680.4x907.2+0+0
ps:Level: Adobe-3.0 EPSF-3.0
signature: 141246e610fe99f6d715095d32098b493a3258c58c755dd44cacb68b5be4129a
Artifacts:
filename: output.eps
verbose: true
Tainted: False
Filesize: 2.467MB
Number pixels: 617K
Pixels per second: 9.223372EB
User time: 0.000u
Elapsed time: 0:01.000
Version: ImageMagick 6.8.9-8 Q16 x64 2014-08-26 http://www.imagemagick.org
Added: identify of temp.png
Image: temp.png
Format: PNG (Portable Network Graphics)
Mime type: image/png
Class: DirectClass
Geometry: 2835x3780+0+0
Resolution: 300x300
Print size: 9.45x12.6
Units: Undefined
Type: TrueColor
Endianess: Undefined
Colorspace: sRGB
Depth: 16-bit
Channel depth:
red: 16-bit
green: 16-bit
blue: 16-bit
Channel statistics:
Pixels: 10716300
Red:
min: 0 (0)
max: 65535 (1)
mean: 56707.6 (0.865302)
standard deviation: 17939.1 (0.273732)
kurtosis: 3.27011
skewness: -2.18726
Green:
min: 771 (0.0117647)
max: 65535 (1)
mean: 57871 (0.883055)
standard deviation: 16384.1 (0.250006)
kurtosis: 3.99522
skewness: -2.33806
Blue:
min: 1419 (0.0216526)
max: 65535 (1)
mean: 60137.5 (0.91764)
standard deviation: 13808.7 (0.210707)
kurtosis: 6.52445
skewness: -2.76051
Image statistics:
Overall:
min: 0 (0)
max: 65535 (1)
mean: 58238.7 (0.888665)
standard deviation: 16134.1 (0.246191)
kurtosis: 4.60442
skewness: -2.44957
Rendering intent: Perceptual
Gamma: 0.45455
Chromaticity:
red primary: (0.64,0.33)
green primary: (0.3,0.6)
blue primary: (0.15,0.06)
white point: (0.3127,0.329)
Background color: white
Border color: srgb(223,223,223)
Matte color: grey74
Transparent color: black
Interlace: None
Intensity: Undefined
Compose: Over
Page geometry: 2835x3780+0+0
Dispose: Undefined
Iterations: 0
Compression: Zip
Orientation: Undefined
Properties:
date:create: 2015-09-09T10:16:17+02:00
date:modify: 2015-09-09T10:18:20+02:00
png:bKGD: chunk was found (see Background color, above)
png:cHRM: chunk was found (see Chromaticity, above)
png:gAMA: gamma=0.45454544 (See Gamma, above)
png:IHDR.bit-depth-orig: 16
png:IHDR.bit_depth: 16
png:IHDR.color-type-orig: 2
png:IHDR.color_type: 2 (Truecolor)
png:IHDR.interlace_method: 0 (Not interlaced)
png:IHDR.width,height: 2835, 3780
png:pHYs: x_res=300, y_res=300, units=0
png:sRGB: intent=0 (Perceptual Intent)
png:text: 4 tEXt/zTXt/iTXt chunks were found
ps:HiResBoundingBox: 680.4x907.2+0+0
ps:Level: Adobe-3.0 EPSF-3.0
signature: dffc47b2e7b1b0bdc1c8afe849bc84561743fe757c4ebb5093487547f67f2d9d
Artifacts:
filename: temp.png
verbose: true
Tainted: False
Filesize: 13.38MB
Number pixels: 10.72M
Pixels per second: 20.61MB
User time: 0.530u
Elapsed time: 0:01.520
Version: ImageMagick 6.8.9-8 Q16 x64 2014-08-26 http://www.imagemagick.org
I tried to use convert of imagemagick 6.5.6 to make a smaller version from original JPEG file in both file size and geometry. The command I used is:
convert tj/p1.jpg -resize 500x tj/456c2e75fe0faa57fd1cfd87117e0963/p1.jpg
The result is funny, the original is 1102x1542+0+0 in 164kb, the converted one is 500x700+0+0 in 174kb. The pixel count is almost the 20% of the original version, with much bigger file size. So I add -strip options to remove all the verbose information in JPEG profile.
convert tj/p1.jpg -strip -resize 500x tj/500_p1.jpg
The 500_p1.jpg is 500x700+0+0 in 173kb, only 1kb less.
Also I tried to use -thumbnail for it.
convert tj/p1.jpg -thumbnail 500x tj/th/p1.jpg
The thumbed jpeg is 500x700+0+0 in 173kb as well.
Finally I found the -quality can help to reduce images. But 75% quality takes 107kb, 25% quality takes only 50kb with visible loss of detail. But the original quality factor is unknown.
Does anyone have similar issues? Hereafter are the image profiles generated by identify. I found the major differences as following:
Geometry: 1102x1542->500x700
print size: 11x15->5x7
Units: Undefined->PixelsPerInch
Quality: unknown->92
Nr. of Pixels: 1.621mb->342kb
Detail of profiles:
Original:
Image: tj/p1.jpg
Format: JPEG (Joint Photographic Experts Group JFIF format)
Class: DirectClass
Geometry: 1102x1542+0+0
Resolution: 100x100
Print size: 11.02x15.42
Units: Undefined
Type: TrueColor
Endianess: Undefined
Colorspace: RGB
Depth: 8-bit
Channel depth:
red: 8-bit
green: 8-bit
blue: 8-bit
Channel statistics:
red:
min: 0 (0)
max: 255 (1)
mean: 218.106 (0.855319)
standard deviation: 52.7336 (0.206798)
kurtosis: 5.04278
skewness: -2.24455
green:
min: 0 (0)
max: 255 (1)
mean: 158.476 (0.621473)
standard deviation: 92.9844 (0.364645)
kurtosis: -1.24112
skewness: -0.535292
blue:
min: 0 (0)
max: 255 (1)
mean: 113.282 (0.444244)
standard deviation: 99.7003 (0.390981)
kurtosis: -1.59582
skewness: 0.278377
Image statistics:
Overall:
min: 0 (0)
max: 255 (1)
mean: 122.466 (0.480259)
standard deviation: 108.274 (0.424604)
kurtosis: -1.78198
skewness: 0.0115088
Rendering intent: Undefined
Interlace: None
Background color: white
Border color: rgb(223,223,223)
Matte color: grey74
Transparent color: black
Page geometry: 1102x1542+0+0
Dispose: Undefined
Iterations: 0
Compression: JPEG
Orientation: Undefined
Properties:
date:create: 2010-10-22T08:35:35+08:00
date:modify: 2010-09-30T10:52:06+08:00
jpeg:colorspace: 2
jpeg:sampling-factor: 2x2,1x1,1x1
signature: cdbd3f63986f0a7c4cd20aedcf9123d91df97e0cb7388f59059b4676fd36d481
Profiles:
Profile-APP12: 15 bytes
Artifacts:
verbose: true
Tainted: False
Filesize: 164kb
Number pixels: 1.621mb
Pixels per second: 20.51mb
User time: 0.078u
Elapsed time: 0:01
Version: ImageMagick 6.5.6-5 2009-09-25 Q16 OpenMP http://www.imagemagick.org
Converted:
Image: tj/456c2e75fe0faa57fd1cfd87117e0963/p1.jpg
Format: JPEG (Joint Photographic Experts Group JFIF format)
Class: DirectClass
Geometry: 500x700+0+0
Resolution: 100x100
Print size: 5x7
Units: PixelsPerInch
Type: TrueColor
Endianess: Undefined
Colorspace: RGB
Depth: 8-bit
Channel depth:
red: 8-bit
green: 8-bit
blue: 8-bit
Channel statistics:
red:
min: 0 (0)
max: 255 (1)
mean: 216.75 (0.849999)
standard deviation: 50.1075 (0.1965)
kurtosis: 4.066
skewness: -2.03195
green:
min: 0 (0)
max: 255 (1)
mean: 158.316 (0.620846)
standard deviation: 89.1433 (0.349582)
kurtosis: -1.17694
skewness: -0.52022
blue:
min: 0 (0)
max: 255 (1)
mean: 113.58 (0.445411)
standard deviation: 96.3298 (0.377764)
kurtosis: -1.53577
skewness: 0.287937
Image statistics:
Overall:
min: 0 (0)
max: 255 (1)
mean: 122.161 (0.479064)
standard deviation: 106.052 (0.415889)
kurtosis: -1.7498
skewness: 0.00808184
Rendering intent: Undefined
Interlace: None
Background color: white
Border color: rgb(223,223,223)
Matte color: grey74
Transparent color: black
Page geometry: 500x700+0+0
Dispose: Undefined
Iterations: 0
Compression: JPEG
Quality: 92
Orientation: Undefined
Properties:
date:create: 2010-10-22T10:27:18+08:00
date:modify: 2010-10-22T10:31:08+08:00
jpeg:colorspace: 2
jpeg:sampling-factor: 2x2,1x1,1x1
signature: 63202ddf9106d3374fe3a396f5105ce8099051cf807ceb2ab5a19532957cec10
Artifacts:
verbose: true
Tainted: False
Filesize: 174kb
Number pixels: 342kb
Version: ImageMagick 6.5.6-5 2009-09-25 Q16 OpenMP http://www.imagemagick.org