我們使用開源圖像處理工具ImageMagick來縮放各種文件的縮略圖。我們認爲所有這些事情都運行得很順利,直到我們意識到某些瀏覽器(即Internet Explorer 8和Chrome)無法顯示JPEG文件。ImageMagick縮略圖在某些瀏覽器上不可見
我只能假設ImageMagick轉換的輸出不是網頁安全的JPEG。爲什麼會出現這種情況,它可以被固定呢?
順便提及,我們使用的是命令行工具convert
和我們使用這些參數:
convert -thumbnail 150x fileToThumb outputPath
編輯:
Image: 50afd2b1-e42c-4e90-9244-9c5a00c1933d.jpg
Format: JPEG (Joint Photographic Experts Group JFIF format)
Class: DirectClass
Geometry: 150x212+0+0
Resolution: 72x72
Print size: 2.08333x2.94444
Units: PixelsPerInch
Type: ColorSeparation
Endianess: Undefined
Colorspace: CMYK
Depth: 8-bit
Channel depth:
cyan: 8-bit
magenta: 8-bit
yellow: 8-bit
black: 8-bit
Channel statistics:
cyan:
min: 0 (0)
max: 255 (1)
mean: 28.492 (0.111734)
standard deviation: 61.879 (0.242663)
kurtosis: 5.32422
skewness: 2.47138
magenta:
min: 0 (0)
max: 255 (1)
mean: 43.5579 (0.170815)
standard deviation: 72.7733 (0.285386)
kurtosis: 1.31682
skewness: 1.57362
yellow:
min: 0 (0)
max: 255 (1)
mean: 53.0706 (0.20812)
standard deviation: 85.3198 (0.334587)
kurtosis: -0.0841614
skewness: 1.2581
black:
min: 0 (0)
max: 52 (0.203922)
mean: 0.149434 (0.000586016)
standard deviation: 1.78161 (0.00698672)
kurtosis: 364.996
skewness: 17.91
Image statistics:
Overall:
min: 0 (0)
max: 255 (1)
mean: 25.054 (0.098251)
standard deviation: 61.3102 (0.240432)
kurtosis: 5.28177
skewness: 2.5304
Total ink density: 300%
Rendering intent: Undefined
Interlace: None
Background color: white
Border color: cmyk(223,223,223,0)
Matte color: grey74
Transparent color: black
Page geometry: 150x212+0+0
Dispose: Undefined
Iterations: 0
Compression: JPEG
Quality: 92
Orientation: Undefined
Properties:
create-date: 2009-08-17T11:38:16+01:00
jpeg:colorspace: 4
jpeg:sampling-factor: 1x1,1x1,1x1,1x1
modify-date: 2009-08-17T11:37:48+01:00
signature: f5e85add196c10f1d73f416482e779245595a644877696fffb2637b5b97f6b9c
Artifacts:
verbose: true
Tainted: False
Filesize: 20.5kb
Number pixels: 31.1kb
Version: ImageMagick 6.5.3-10 2009-06-19 Q16 OpenMP http://www.imagemagick.org
下面是識別輸出(也注意到,這個JPEG圖像顯示器作爲Mac上的純黑色圖像):
[此圖片在哪裏]
什麼是正在生成的縮略圖圖像的BitDepth? – Wade 2009-08-12 16:27:35