Python 如何使用OpenCV读取截断的图像？
Python 如何使用OpenCV读取截断的图像？,python,opencv,Python,Opencv,cv2.imread为下图返回None 当我在MacOS上预览图像时，我只看到一个空白矩形，但我可以在Chrome上看到图像 当我通过读取图像并将其保存回另一个文件来检查PIL时，它会抱怨图像被截断 我知道我可以配置PIL来接受“截断”的图像，我是否可以告诉OpenCV我知道这是一个截断的图像，但请尝试阅读它。我不知道在OpenCV中如何做到这一点。但是，您可以先使用ImageMagick重新写入映像（它安装在大多数Linux发行版上，可用于macOS和Windows） 这将是终端中的以下命令
cv2.imreadNonePIL我知道我可以配置
PILOpenCVmagick broken.png fixed.png
PNG2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Configure convert[83500]: utility.c/ExpandFilenames/943/Configure
Command line: convert {-debug} {all} {blank.png} {a.png}
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Configure convert[83500]: configure.c/GetConfigureOptions/688/Configure
Searching for configure file: "/usr/local/Cellar/imagemagick/7.0.5-4/share/ImageMagick-7/coder.xml"
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Configure convert[83500]: configure.c/GetConfigureOptions/688/Configure
Searching for configure file: "/usr/local/Cellar/imagemagick/7.0.5-4/lib/ImageMagick//config-Q16HDRI/coder.xml"
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Configure convert[83500]: configure.c/GetConfigureOptions/688/Configure
Searching for configure file: "/usr/local/Cellar/imagemagick/7.0.5-4/etc/ImageMagick-7/coder.xml"
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Configure convert[83500]: configure.c/GetConfigureOptions/688/Configure
Searching for configure file: "/usr/local/Cellar/imagemagick/7.0.5-4/share/doc/ImageMagick-7/coder.xml"
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Configure convert[83500]: configure.c/GetConfigureOptions/688/Configure
Searching for configure file: "/Users/mark/.config/ImageMagick/coder.xml"
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Configure convert[83500]: coder.c/LoadCoderCache/829/Configure
Loading coder configuration file "/usr/local/Cellar/imagemagick/7.0.5-4/etc/ImageMagick-7/coder.xml" ...
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Module convert[83500]: module.c/OpenModule/1265/Module
Searching for module "PNG" using filename "png.la"
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Module convert[83500]: module.c/GetMagickModulePath/560/Module
Searching for coder module file "png.la" ...
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Module convert[83500]: module.c/OpenModule/1274/Module
Opening module at path "/usr/local/Cellar/imagemagick/7.0.5-4/lib/ImageMagick//modules-Q16HDRI/coders/png.la"
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Module convert[83500]: module.c/OpenModule/1301/Module
Method "RegisterPNGImage" in module "PNG" at address 0x108ebfed4
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Module convert[83500]: module.c/OpenModule/1315/Module
Method "UnregisterPNGImage" in module "PNG" at address 0x108ec9db2
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Configure convert[83500]: configure.c/GetConfigureOptions/688/Configure
Searching for configure file: "/usr/local/Cellar/imagemagick/7.0.5-4/share/ImageMagick-7/magic.xml"
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Configure convert[83500]: configure.c/GetConfigureOptions/688/Configure
Searching for configure file: "/usr/local/Cellar/imagemagick/7.0.5-4/lib/ImageMagick//config-Q16HDRI/magic.xml"
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Configure convert[83500]: configure.c/GetConfigureOptions/688/Configure
Searching for configure file: "/usr/local/Cellar/imagemagick/7.0.5-4/etc/ImageMagick-7/magic.xml"
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Configure convert[83500]: configure.c/GetConfigureOptions/688/Configure
Searching for configure file: "/usr/local/Cellar/imagemagick/7.0.5-4/share/doc/ImageMagick-7/magic.xml"
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Configure convert[83500]: configure.c/GetConfigureOptions/688/Configure
Searching for configure file: "/Users/mark/.config/ImageMagick/magic.xml"
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Configure convert[83500]: magic.c/LoadMagicCache/853/Configure
Loading magic configure file "/usr/local/Cellar/imagemagick/7.0.5-4/etc/ImageMagick-7/magic.xml" ...
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Policy convert[83500]: policy.c/IsRightsAuthorized/601/Policy
Domain: Path; rights=Read; pattern="blank.png" ...
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Blob convert[83500]: blob.c/OpenBlob/2986/Blob
read 3 magic header bytes
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Cache convert[83500]: cache.c/DestroyPixelCache/960/Cache
destroy
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Policy convert[83500]: policy.c/IsRightsAuthorized/601/Policy
Domain: Coder; rights=Read; pattern="PNG" ...
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/ReadPNGImage/4348/Coder
Enter ReadPNGImage()
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Policy convert[83500]: policy.c/IsRightsAuthorized/601/Policy
Domain: Path; rights=Read; pattern="blank.png" ...
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Blob convert[83500]: blob.c/OpenBlob/2986/Blob
read 3 magic header bytes
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/ReadOnePNGImage/2401/Coder
Enter ReadOnePNGImage()
IM version = 7.0.5-4
Libpng version = 1.6.29
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/ReadOnePNGImage/2414/Coder
Zlib version = 1.2.8
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/ReadOnePNGImage/2446/Coder
Before reading:
image->alpha_trait=0 image->rendering_intent=2
image->colorspace=23
image->gamma=0.454545
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/ReadOnePNGImage/2735/Coder
PNG width: 200, height: 200
PNG color_type: 6, bit_depth: 8
PNG compression_method: 0
PNG interlace_method: 0, filter_method: 0
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/ReadOnePNGImage/3005/Coder
Setting sRGB as if in input
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/ReadOnePNGImage/3321/Coder
image->colorspace=23
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/ReadOnePNGImage/3494/Coder
Reading PNG IDAT chunk(s)
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Resource convert[83500]: resource.c/AcquireMagickResource/319/Resource
Width: 200B/0P/107.4MP
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Resource convert[83500]: resource.c/AcquireMagickResource/319/Resource
Height: 200B/0P/107.4MP
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Pixel convert[83500]: pixel.c/SetPixelChannelMask/6274/Pixel
blank.png[07ffffff]
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Pixel convert[83500]: pixel.c/LogPixelChannels/6164/Pixel
blank.png[07ffffff]
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Pixel convert[83500]: pixel.c/LogPixelChannels/6255/Pixel
0: red (update)
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Pixel convert[83500]: pixel.c/LogPixelChannels/6255/Pixel
1: green (update)
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Pixel convert[83500]: pixel.c/LogPixelChannels/6255/Pixel
2: blue (update)
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Resource convert[83500]: resource.c/AcquireMagickResource/319/Resource
Area: 480KB/480KB/68.719GB
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Resource convert[83500]: resource.c/AcquireMagickResource/319/Resource
Memory: 480KB/469KiB/32GiB
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Cache convert[83500]: cache.c/OpenPixelCache/3562/Cache
open blank.png[0] (Heap Memory, 200x200x3 469KiB)
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Resource convert[83500]: resource.c/AcquireMagickResource/319/Resource
Memory: 800B/470KiB/32GiB
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/ReadOnePNGImage/3512/Coder
Converting PNG pixels to pixel packets
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Resource convert[83500]: resource.c/AcquireMagickResource/319/Resource
Width: 200B/0P/107.4MP
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Resource convert[83500]: resource.c/AcquireMagickResource/319/Resource
Height: 200B/0P/107.4MP
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Pixel convert[83500]: pixel.c/SetPixelChannelMask/6274/Pixel
blank.png[07ffffff]
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Pixel convert[83500]: pixel.c/LogPixelChannels/6164/Pixel
blank.png[07ffffff]
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Pixel convert[83500]: pixel.c/LogPixelChannels/6255/Pixel
0: red (update,blend)
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Pixel convert[83500]: pixel.c/LogPixelChannels/6255/Pixel
1: green (update,blend)
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Pixel convert[83500]: pixel.c/LogPixelChannels/6255/Pixel
2: blue (update,blend)
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Pixel convert[83500]: pixel.c/LogPixelChannels/6255/Pixel
3: alpha (update)
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Resource convert[83500]: resource.c/AcquireMagickResource/319/Resource
Area: 640KB/640KB/68.719GB
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Resource convert[83500]: resource.c/AcquireMagickResource/319/Resource
Memory: 640KB/1.069MiB/32GiB
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Cache convert[83500]: cache.c/ClonePixelCacheRepository/759/Cache
Memory => Memory
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Resource convert[83500]: resource.c/RelinquishMagickResource/968/Resource
Memory: 480KB/626KiB/32GiB
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Cache convert[83500]: cache.c/OpenPixelCache/3562/Cache
open blank.png[0] (Heap Memory, 200x200x4 625KiB)
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/ReadOnePNGImage/3586/Coder
Looking for cheap transparent pixel
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/MagickPNGWarningHandler/1704/Coder
libpng-1.6.29 warning: Expected 8192 bytes; found 8067 bytes
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Locale convert[83500]: locale.c/GetLocaleOptions/829/Locale
Searching for locale file: "/usr/local/Cellar/imagemagick/7.0.5-4/share/ImageMagick-7/locale.xml"
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Locale convert[83500]: locale.c/GetLocaleOptions/829/Locale
Searching for locale file: "/usr/local/Cellar/imagemagick/7.0.5-4/lib/ImageMagick//config-Q16HDRI/locale.xml"
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Locale convert[83500]: locale.c/GetLocaleOptions/829/Locale
Searching for locale file: "/usr/local/Cellar/imagemagick/7.0.5-4/etc/ImageMagick-7/locale.xml"
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Locale convert[83500]: locale.c/GetLocaleOptions/829/Locale
Searching for locale file: "/usr/local/Cellar/imagemagick/7.0.5-4/share/doc/ImageMagick-7/locale.xml"
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Locale convert[83500]: locale.c/GetLocaleOptions/829/Locale
Searching for locale file: "/Users/mark/.config/ImageMagick/locale.xml"
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Configure convert[83500]: locale.c/LoadLocaleCache/1181/Configure
Loading locale configure file "/usr/local/Cellar/imagemagick/7.0.5-4/share/ImageMagick-7/locale.xml" ...
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Locale convert[83500]: locale.c/GetLocaleOptions/829/Locale
Searching for locale file: "/usr/local/Cellar/imagemagick/7.0.5-4/share/ImageMagick-7/english.xml"
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Locale convert[83500]: locale.c/GetLocaleOptions/829/Locale
Searching for locale file: "/usr/local/Cellar/imagemagick/7.0.5-4/lib/ImageMagick//config-Q16HDRI/english.xml"
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Locale convert[83500]: locale.c/GetLocaleOptions/829/Locale
Searching for locale file: "/usr/local/Cellar/imagemagick/7.0.5-4/etc/ImageMagick-7/english.xml"
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Locale convert[83500]: locale.c/GetLocaleOptions/829/Locale
Searching for locale file: "/usr/local/Cellar/imagemagick/7.0.5-4/share/doc/ImageMagick-7/english.xml"
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Locale convert[83500]: locale.c/GetLocaleOptions/829/Locale
Searching for locale file: "/Users/mark/.config/ImageMagick/english.xml"
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Configure convert[83500]: locale.c/LoadLocaleCache/1181/Configure
Loading locale configure file "/usr/local/Cellar/imagemagick/7.0.5-4/share/ImageMagick-7/english.xml" ...
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Exception convert[83500]: png.c/MagickPNGWarningHandler/1707/Exception
Expected 8192 bytes; found 8067 bytes `blank.png'
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/MagickPNGErrorHandler/1671/Coder
libpng-1.6.29 error: Read Exception
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Exception convert[83500]: png.c/MagickPNGErrorHandler/1674/Exception
Read Exception `blank.png'
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Resource convert[83500]: resource.c/RelinquishMagickResource/968/Resource
Memory: 800B/625KiB/32GiB
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/ReadOnePNGImage/2526/Coder
exit ReadOnePNGImage() with error.
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/ReadPNGImage/4427/Coder
page.w: 0, page.h: 0,page.x: 0, page.y: 0.
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/ReadPNGImage/4431/Coder
image->colorspace: 23
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/ReadPNGImage/4436/Coder
exit ReadPNGImage()
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Exception convert[83500]: constitute.c/ReadImage/572/Exception
Coder (PNG) generated an image despite an error (450), notify the developers
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Policy convert[83500]: policy.c/IsRightsAuthorized/601/Policy
Domain: Coder; rights=Write; pattern="PNG" ...
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/WritePNGImage/12090/Coder
Enter WritePNGImage()
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/WritePNGImage/12685/Coder
Chunks to be excluded from the output png:
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/8428/Coder
Enter WriteOnePNGImage()
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/8461/Coder
IM version = 7.0.5-4
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/8463/Coder
Libpng version = 1.6.29
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/8470/Coder
Zlib version = 1.2.8
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/8644/Coder
image->storage_class=DirectClass
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/8649/Coder
image->taint=MagickFalse
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/8901/Coder
Enter BUILD_PALETTE:
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/8906/Coder
image->columns=200
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/8908/Coder
image->rows=200
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/8910/Coder
image->alpha_trait=4
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/8912/Coder
image->depth=8
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/8948/Coder
image->colors=0
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/8952/Coder
(zero means unknown)
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/8956/Coder
Regenerate the colormap
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Resource convert[83500]: resource.c/AcquireMagickResource/319/Resource
Width: 200B/0P/107.4MP
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Resource convert[83500]: resource.c/AcquireMagickResource/319/Resource
Height: 200B/0P/107.4MP
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Pixel convert[83500]: pixel.c/SetPixelChannelMask/6274/Pixel
a.png[07ffffff]
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Pixel convert[83500]: pixel.c/LogPixelChannels/6164/Pixel
a.png[07ffffff]
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Pixel convert[83500]: pixel.c/LogPixelChannels/6255/Pixel
0: red (update,blend)
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Pixel convert[83500]: pixel.c/LogPixelChannels/6255/Pixel
1: green (update,blend)
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Pixel convert[83500]: pixel.c/LogPixelChannels/6255/Pixel
2: blue (update,blend)
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Pixel convert[83500]: pixel.c/LogPixelChannels/6255/Pixel
3: alpha (update)
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Resource convert[83500]: resource.c/AcquireMagickResource/319/Resource
Area: 640KB/640KB/68.719GB
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Resource convert[83500]: resource.c/AcquireMagickResource/319/Resource
Memory: 640KB/1.221MiB/32GiB
2017-03-31T08:45:37+01:00 0:00.000 0.000u 7.0.5 Cache convert[83500]: cache.c/OpenPixelCache/3562/Cache
open a.png[0] (Heap Memory, 200x200x4 625KiB)
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/9070/Coder
Check colormap for background (65535,65535,65535)
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/9096/Coder
No room in the colormap to add background color
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/9105/Coder
image has more than 256 colors
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/9299/Coder
image->colors=0
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/9323/Coder
number_transparent = 1
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/9337/Coder
number_opaque > 256
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/9341/Coder
number_semitransparent = 0
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/9358/Coder
At least one pixel or the background is non-gray
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/9361/Coder
Exit BUILD_PALETTE:
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/9733/Coder
Cheap transparency is possible.
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/9894/Coder
width=200
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/9896/Coder
height=200
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/9898/Coder
image_matte=4
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/9900/Coder
image->depth=8
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/9902/Coder
Tentative ping_bit_depth=8
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/9987/Coder
Setting up bKGD chunk (1)
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/9989/Coder
background_color index is 0
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/9993/Coder
ping_bit_depth=8
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/10131/Coder
Selecting PNG colortype:
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/10189/Coder
Selected PNG colortype=6
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/10226/Coder
Number of colors: 0
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/10229/Coder
Tentative PNG bit depth: 8
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/10241/Coder
Tentative PNG color type: RGB+Alpha (6)
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/10246/Coder
image_info->type: 0
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/10249/Coder
image_depth: 8
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/10252/Coder
image->depth: 8
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/10256/Coder
ping_bit_depth: 8
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/10660/Coder
PNG color type: RGB+Alpha (6)
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/10668/Coder
Setting up deflate compression
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/10671/Coder
Compression buffer size: 32768
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/10678/Coder
Compression mem level: 9
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/10757/Coder
Compression level: 7
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/10766/Coder
Setting up filtering
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/10770/Coder
Base filter method: ADAPTIVE
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/10905/Coder
Writing PNG header chunks
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/11046/Coder
Setting up gAMA chunk
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/11074/Coder
Setting up cHRM chunk
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/11090/Coder
Setting up bKGD chunk
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/11092/Coder
background color = (255,255,255)
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/11097/Coder
index = 0, gray=255
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Policy convert[83500]: policy.c/IsRightsAuthorized/601/Policy
Domain: Path; rights=Write; pattern="a.png" ...
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/11304/Coder
Writing PNG image data
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/11307/Coder
Allocating 800 bytes of memory for pixels
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Resource convert[83500]: resource.c/AcquireMagickResource/319/Resource
Memory: 800B/1.221MiB/32GiB
2017-03-31T08:45:37+01:00 0:00.010 0.000u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/11511/Coder
Writing row of pixels (3)
2017-03-31T08:45:37+01:00 0:00.020 0.020u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/11608/Coder
Wrote PNG image data
2017-03-31T08:45:37+01:00 0:00.020 0.020u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/11611/Coder
Width: 200
2017-03-31T08:45:37+01:00 0:00.020 0.020u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/11614/Coder
Height: 200
2017-03-31T08:45:37+01:00 0:00.020 0.020u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/11623/Coder
PNG bit-depth written: 8
2017-03-31T08:45:37+01:00 0:00.020 0.020u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/11632/Coder
PNG color-type written: 6
2017-03-31T08:45:37+01:00 0:00.020 0.020u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/11635/Coder
PNG Interlace method: 0
2017-03-31T08:45:37+01:00 0:00.020 0.020u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/11697/Coder
Setting up text chunk
2017-03-31T08:45:37+01:00 0:00.020 0.020u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/11700/Coder
keyword: 'date:create'
2017-03-31T08:45:37+01:00 0:00.020 0.020u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/11697/Coder
Setting up text chunk
2017-03-31T08:45:37+01:00 0:00.020 0.020u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/11700/Coder
keyword: 'date:modify'
2017-03-31T08:45:37+01:00 0:00.020 0.020u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/11815/Coder
Writing PNG end info
2017-03-31T08:45:37+01:00 0:00.020 0.020u 7.0.5 Resource convert[83500]: resource.c/RelinquishMagickResource/968/Resource
Memory: 800B/1.221MiB/32GiB
2017-03-31T08:45:37+01:00 0:00.020 0.020u 7.0.5 Cache convert[83500]: cache.c/DestroyPixelCache/960/Cache
destroy a.png[0]
2017-03-31T08:45:37+01:00 0:00.020 0.020u 7.0.5 Resource convert[83500]: resource.c/RelinquishMagickResource/968/Resource
Memory: 640KB/625KiB/32GiB
2017-03-31T08:45:37+01:00 0:00.020 0.020u 7.0.5 Coder convert[83500]: png.c/WriteOnePNGImage/11883/Coder
exit WriteOnePNGImage()
2017-03-31T08:45:37+01:00 0:00.020 0.020u 7.0.5 Coder convert[83500]: png.c/WritePNGImage/12753/Coder
exit WritePNGImage()
2017-03-31T08:45:37+01:00 0:00.020 0.020u 7.0.5 Cache convert[83500]: cache.c/DestroyPixelCache/960/Cache
destroy blank.png[0]
2017-03-31T08:45:37+01:00 0:00.020 0.020u 7.0.5 Resource convert[83500]: resource.c/RelinquishMagickResource/968/Resource
Memory: 640KB/0B/32GiB
convert: Expected 8192 bytes; found 8067 bytes `blank.png' @ warning/png.c/MagickPNGWarningHandler/1707.
convert: Read Exception `blank.png' @ error/png.c/MagickPNGErrorHandler/1674.
我浏览了一下图像的属性选项卡，发现图像的位深度是32。这可能是原因吗？@Jeru，imread（）应该能够读取任何位深度。