problem loading jpeg image from blob

Magick++ is an object-oriented C++ interface to ImageMagick. Use this forum to discuss, make suggestions about, or report bugs concerning Magick++.
Post Reply
chenzhaoxu
Posts: 3
Joined: 2013-05-02T19:54:56-07:00
Authentication code: 6789

problem loading jpeg image from blob

Post by chenzhaoxu » 2013-05-02T20:08:26-07:00

I got Imagemagick 6.6.4 installed on fedora 14, 64 bits system. And I got the delegate libraries installed as well. I can convert images in command line to jpg format. However, in my code, I read an image from python as a string and pass it to the blob. Then read the image from blob, the code generate an run time error:

Magick: no decode delegate for this image format `' @ error/blob.c/ImageToBlob/1470

The following are my code:

Code: Select all

convert_image(const string & data)
{
	Image magic_image;
	//magic_image.magick("JPEG");
	Blob blob( data.c_str(), data.length() );	
	magic_image.read(blob);
}
the string data is from a python code,
data = open('temp.jpg', 'rb').read()

No matter what image format I use, the above code always generate the error: no decode delegate for this image format `' @ error/blob.c/ImageToBlob/1470

But I am sure the delegate libraries are installed.
  • Name Value
    -------------------------------------------------------------------------------
    CC gcc -std=gnu99 -std=gnu99
    CFLAGS -fopenmp -g -O2 -Wall -pthread
    CONFIGURE ./configure
    COPYRIGHT Copyright (C) 1999-2010 ImageMagick Studio LLC
    CPPFLAGS -I/usr/local/include/ImageMagick
    CXX g++
    CXXFLAGS -g -O2 -pthread
    DEFS -DHAVE_CONFIG_H
    DELEGATES bzlib freetype jpeg jp2 lcms tiff x11 zlib
    DISTCHECK_CONFIG_FLAGS --disable-deprecated --with-quantum-depth=16 --with-umem=no --with-autotrace=no --with-gslib=no --with-fontpath= --with-perl=no
    EXEC-PREFIX /usr/local
    FEATURES OpenMP
    HOST x86_64-unknown-linux-gnu
    LDFLAGS -L/usr/local/lib
    LIB_VERSION 0x664
    LIB_VERSION_NUMBER 6,6,4,10
    LIBS -lMagickCore -llcms -ltiff -lfreetype -ljasper -ljpeg -lXext -lXt -lSM -lICE -lX11 -lbz2 -lz -lm -lgomp -lpthread
    NAME ImageMagick
    PCFLAGS -fopenmp
    PREFIX /usr/local
    QuantumDepth 16
    RELEASE_DATE 2013-05-02
    VERSION 6.6.4
    WEBSITE http://www.imagemagick.org


    Name Value
    -------------------------------------------------------------------------------
    NAME ImageMagick
    [schen2@cypress-vm3 Alex_King]$ identify -list format
    Format Module Mode Description
    -------------------------------------------------------------------------------
    3FR DNG r-- Hasselblad CFV/H3D39II
    A* RAW rw+ Raw alpha samples
    AI PDF rw- Adobe Illustrator CS2
    ART* ART rw- PFS: 1st Publisher Clip Art
    ARW DNG r-- Sony Alpha Raw Image Format
    AVI MPEG r-- Microsoft Audio/Visual Interleaved
    AVS* AVS rw+ AVS X image
    B* RAW rw+ Raw blue samples
    BMP* BMP rw- Microsoft Windows bitmap image
    BMP2* BMP -w- Microsoft Windows bitmap image (V2)
    BMP3* BMP -w- Microsoft Windows bitmap image (V3)
    C* RAW rw+ Raw cyan samples
    CAL* CALS rw- Continuous Acquisition and Life-cycle Support Type 1
    Specified in MIL-R-28002 and MIL-PRF-28002
    CALS* CALS rw- Continuous Acquisition and Life-cycle Support Type 1
    Specified in MIL-R-28002 and MIL-PRF-28002
    CANVAS* XC r-- Constant image uniform color
    CAPTION* CAPTION r-- Image caption
    CIN* CIN rw+ Cineon Image File
    CIP* CIP -w- Cisco IP phone image format
    CLIP* CLIP -w+ Image Clip Mask
    CMYK* CMYK rw+ Raw cyan, magenta, yellow, and black samples
    CMYKA* CMYK rw+ Raw cyan, magenta, yellow, black, and alpha samples
    CR2 DNG r-- Canon Digital Camera Raw Image Format
    CRW DNG r-- Canon Digital Camera Raw Image Format
    CUR* CUR rw- Microsoft icon
    CUT* CUT r-- DR Halo
    DCM* DCM r-- Digital Imaging and Communications in Medicine image
    DICOM is used by the medical community for images like X-rays. The
    specification, "Digital Imaging and Communications in Medicine
    (DICOM)", is available at http://medical.nema.org/. In particular,
    see part 5 which describes the image encoding (RLE, JPEG, JPEG-LS),
    and supplement 61 which adds JPEG-2000 encoding.
    DCR DNG r-- Kodak Digital Camera Raw Image File
    DCX* PCX rw+ ZSoft IBM PC multi-page Paintbrush
    DDS* DDS r-- Microsoft DirectDraw Surface
    DFONT* TTF r-- Multi-face font package (Freetype 2.4.2)
    DNG DNG r-- Digital Negative
    DPX* DPX rw- SMPTE 268M-2003 (DPX 2.0)
    Digital Moving Picture Exchange Bitmap, Version 2.0.
    See SMPTE 268M-2003 specification at http://www.smtpe.org

    EPDF PDF rw- Encapsulated Portable Document Format
    EPI PS rw- Encapsulated PostScript Interchange format
    EPS PS rw- Encapsulated PostScript
    EPS2* PS2 -w- Level II Encapsulated PostScript
    EPS3* PS3 -w+ Level III Encapsulated PostScript
    EPSF PS rw- Encapsulated PostScript
    EPSI PS rw- Encapsulated PostScript Interchange format
    EPT EPT rw- Encapsulated PostScript with TIFF preview
    EPT2 EPT rw- Encapsulated PostScript Level II with TIFF preview
    EPT3 EPT rw+ Encapsulated PostScript Level III with TIFF preview
    ERF DNG r-- Epson RAW Format
    FAX* FAX rw+ Group 3 FAX
    FAX machines use non-square pixels which are 1.5 times wider than
    they are tall but computer displays use square pixels, therefore
    FAX images may appear to be narrow unless they are explicitly
    resized using a geometry of "150x100%".

    FITS* FITS rw- Flexible Image Transport System
    FRACTAL* PLASMA r-- Plasma fractal image
    FTS* FTS rw- Flexible Image Transport System
    G* RAW rw+ Raw green samples
    G3* FAX rw- Group 3 FAX
    GIF* GIF rw+ CompuServe graphics interchange format
    GIF87* GIF rw- CompuServe graphics interchange format (version 87a)
    GRADIENT* GRADIENT r-- Gradual linear passing from one shade to another
    GRAY* GRAY rw+ Raw gray samples
    GROUP4* TIFF rw- Raw CCITT Group4
    HISTOGRAM* HISTOGRAM -w- Histogram of the image
    HRZ* HRZ rw- Slow Scan TeleVision
    HTM* HTML -w- Hypertext Markup Language and a client-side image map
    HTML* HTML -w- Hypertext Markup Language and a client-side image map
    ICB* TGA rw+ Truevision Targa image
    ICO* ICON rw+ Microsoft icon
    ICON* ICON rw- Microsoft icon
    INFO INFO -w+ The image format and characteristics
    INLINE* INLINE r-- Base64-encoded inline images
    IPL* IPL rw+ IPL Image Sequence
    J2C* JP2 rw- JPEG-2000 Code Stream Syntax
    JP2* JP2 rw- JPEG-2000 File Format Syntax
    JPC* JP2 rw- JPEG-2000 Code Stream Syntax
    JPEG* JPEG rw- Joint Photographic Experts Group JFIF format (62)
    JPG* JPEG rw- Joint Photographic Experts Group JFIF format (62)
    JPX* JP2 rw- JPEG-2000 File Format Syntax
    K* RAW rw+ Raw black samples
    K25 DNG r-- Kodak Digital Camera Raw Image Format
    KDC DNG r-- Kodak Digital Camera Raw Image Format
    LABEL* LABEL r-- Image label
    M* RAW rw+ Raw magenta samples
    M2V MPEG rw+ MPEG Video Stream
    M4V MPEG rw+ Raw MPEG-4 Video
    MAP* MAP rw- Colormap intensities and indices
    MAT MAT rw+ MATLAB level 5 image format
    MATTE* MATTE -w+ MATTE format
    MIFF* MIFF rw+ Magick Image File Format
    MONO* MONO rw- Raw bi-level bitmap
    MOV MPEG rw+ MPEG Video Stream
    MP4 MPEG rw+ MPEG-4 Video Stream
    MPC* MPC rw+ Magick Persistent Cache image format
    MPEG MPEG rw+ MPEG Video Stream
    MPG MPEG rw+ MPEG Video Stream
    MRW DNG r-- Sony (Minolta) Raw Image File
    MSL* MSL --- Magick Scripting Language
    MSVG SVG -w+ ImageMagick's own SVG internal renderer
    MTV* MTV rw+ MTV Raytracing image format
    MVG* MVG rw- Magick Vector Graphics
    NEF DNG r-- Nikon Digital SLR Camera Raw Image File
    NULL* NULL rw- Constant image of uniform color
    O* RAW rw+ Raw opacity samples
    ORF DNG r-- Olympus Digital Camera Raw Image File
    OTB* OTB rw- On-the-air bitmap
    OTF* TTF r-- Open Type font (Freetype 2.4.2)
    PAL* UYVY rw- 16bit/pixel interleaved YUV
    PALM* PALM rw+ Palm pixmap
    PAM* PNM rw+ Common 2-dimensional bitmap format
    PATTERN* PATTERN r-- Predefined pattern
    PBM* PNM rw+ Portable bitmap format (black and white)
    PCD* PCD rw- Photo CD
    PCDS* PCD rw- Photo CD
    PCL PCL rw+ Printer Control Language
    PCT* PICT rw- Apple Macintosh QuickDraw/PICT
    PCX* PCX rw- ZSoft IBM PC Paintbrush
    PDB* PDB rw+ Palm Database ImageViewer Format
    PDF PDF rw+ Portable Document Format
    PDFA PDF rw+ Portable Document Archive Format
    PEF DNG r-- Pentax Electronic File
    PES* PES r-- Embrid Embroidery Format
    PFA* TTF r-- Postscript Type 1 font (ASCII) (Freetype 2.4.2)
    PFB* TTF r-- Postscript Type 1 font (binary) (Freetype 2.4.2)
    PFM* PFM rw+ Portable float format
    PGM* PNM rw+ Portable graymap format (gray scale)
    PGX* JP2 r-- JPEG-2000 VM Format
    PICON* XPM rw- Personal Icon
    PICT* PICT rw- Apple Macintosh QuickDraw/PICT
    PIX* PIX r-- Alias/Wavefront RLE image format
    PJPEG* JPEG rw- Joint Photographic Experts Group JFIF format (62)
    PLASMA* PLASMA r-- Plasma fractal image
    PNM* PNM rw+ Portable anymap
    PPM* PNM rw+ Portable pixmap format (color)
    PREVIEW* PREVIEW -w- Show a preview an image enhancement, effect, or f/x
    PS PS rw+ PostScript
    PS2* PS2 -w+ Level II PostScript
    PS3* PS3 -w+ Level III PostScript
    PSB* PSD rw+ Adobe Large Document Format
    PSD* PSD rw+ Adobe Photoshop bitmap
    PTIF* TIFF rw+ Pyramid encoded TIFF
    PWP* PWP r-- Seattle Film Works
    R* RAW rw+ Raw red samples
    RADIAL-GRADIENT* GRADIENT r-- Gradual radial passing from one shade to another
    RAF DNG r-- Fuji CCD-RAW Graphic File
    RAS* SUN rw+ SUN Rasterfile
    RGB* RGB rw+ Raw red, green, and blue samples
    RGBA* RGB rw+ Raw red, green, blue, and alpha samples
    RGBO* RGB rw+ Raw red, green, blue, and opacity samples
    RLA* RLA r-- Alias/Wavefront image
    RLE* RLE r-- Utah Run length encoded image
    SCR* SCR r-- ZX-Spectrum SCREEN$
    SCT* SCT r-- Scitex HandShake
    SFW* SFW r-- Seattle Film Works
    SGI* SGI rw+ Irix RGB image
    SHTML* HTML -w- Hypertext Markup Language and a client-side image map
    SR2 DNG r-- Sony Raw Format 2
    SRF DNG r-- Sony Raw Format
    STEGANO* STEGANO r-- Steganographic image
    SUN* SUN rw+ SUN Rasterfile
    SVG SVG -w+ Scalable Vector Graphics
    SVGZ SVG -w+ Compressed Scalable Vector Graphics
    TEXT* TXT rw+ Text
    TGA* TGA rw+ Truevision Targa image
    THUMBNAIL* THUMBNAIL -w+ EXIF Profile Thumbnail
    TIFF* TIFF rw+ Tagged Image File Format (LIBTIFF, Version 3.9.5)
    TIFF64* TIFF --- Tagged Image File Format (64-bit) (LIBTIFF, Version 3.9.5)
    TILE* TILE r-- Tile image with a texture
    TIM* TIM r-- PSX TIM
    TTC* TTF r-- TrueType font collection (Freetype 2.4.2)
    TTF* TTF r-- TrueType font (Freetype 2.4.2)
    TXT* TXT rw+ Text
    UIL* UIL -w- X-Motif UIL table
    UYVY* UYVY rw- 16bit/pixel interleaved YUV
    VDA* TGA rw+ Truevision Targa image
    VICAR* VICAR rw- VICAR rasterfile format
    VID* VID rw+ Visual Image Directory
    VIFF* VIFF rw+ Khoros Visualization image
    VST* TGA rw+ Truevision Targa image
    WBMP* WBMP rw- Wireless Bitmap (level 0) image
    WMV MPEG rw+ Windows Media Video
    WPG* WPG r-- Word Perfect Graphics
    X* X rw+ X Image
    X3F DNG r-- Sigma Camera RAW Picture File
    XBM* XBM rw- X Windows system bitmap (black and white)
    XC* XC r-- Constant image uniform color
    XCF* XCF r-- GIMP image
    XPM* XPM rw- X Windows system pixmap (color)
    XPS XPS r-- Microsoft XML Paper Specification
    XV* VIFF rw+ Khoros Visualization image
    XWD* XWD rw- X Windows system window dump (color)
    Y* RAW rw+ Raw yellow samples
    YCbCr* YCbCr rw+ Raw Y, Cb, and Cr samples
    YCbCrA* YCbCr rw+ Raw Y, Cb, Cr, and alpha samples
    YUV* YUV rw- CCIR 601 4:1:1 or 4:2:2
Can any one help me, it is really annoying. I have tried on it for several days, but no progress.

Tirisfal
Posts: 1
Joined: 2013-09-26T06:01:51-07:00
Authentication code: 6789

Re: problem loading jpeg image from blob

Post by Tirisfal » 2013-09-26T06:05:45-07:00

Does anyone found out what the reason may be? I have very similar problem.

Also may it be the case that using newest ImageMagick version is incompatible to older one? I have an old project which uses it and I installed the newest Image Magick and have this error.

Thanks for all responses beforehand

Post Reply