https://community.intel.com/t5/Intel-Integrated-Performance/encode-Jpeg-by-IJL/m-p/990504#M22245 <DIV>Hi,</DIV> <DIV></DIV> <DIV>Can I encode an 8-bits Gray, YUV422, YUV411image to jpeg by using IJL without converting it to 24-bits RGB image ?</DIV> <DIV>I learn that there a IJL_G type used for 8 bits Gray image but when I use it :</DIV> <DIV></DIV> <DIV> Jcprops.DIBChannels = 1;<BR /> Jcprops.DIBColor = IJL_G;<BR /> Jcprops.JPGChannels = 1;<BR /> Jcprops.JPGColor = IJL_G;<BR /> Jcprops.DIBSubsampling = IJL_NONE;<BR /> Jcprops.JPGSubsampling = IJL_422;</DIV> <DIV></DIV> <DIV>an error : IJL_UNSUPPORTED_SUBSAMPLING display<BR />Maybe IJL supports only for 24-bit color image (Jcprops.JPGChannels = 3).</DIV> <DIV>Is it right ?<BR /></DIV> Sat, 21 May 2005 02:51:17 GMT van 2005-05-21T02:51:17Z https://community.intel.com/t5/Intel-Integrated-Performance/encode-Jpeg-by-IJL/m-p/990504#M22245 <DIV>Hi,</DIV> <DIV></DIV> <DIV>Can I encode an 8-bits Gray, YUV422, YUV411image to jpeg by using IJL without converting it to 24-bits RGB image ?</DIV> <DIV>I learn that there a IJL_G type used for 8 bits Gray image but when I use it :</DIV> <DIV></DIV> <DIV> Jcprops.DIBChannels = 1;<BR /> Jcprops.DIBColor = IJL_G;<BR /> Jcprops.JPGChannels = 1;<BR /> Jcprops.JPGColor = IJL_G;<BR /> Jcprops.DIBSubsampling = IJL_NONE;<BR /> Jcprops.JPGSubsampling = IJL_422;</DIV> <DIV></DIV> <DIV>an error : IJL_UNSUPPORTED_SUBSAMPLING display<BR />Maybe IJL supports only for 24-bit color image (Jcprops.JPGChannels = 3).</DIV> <DIV>Is it right ?<BR /></DIV> Sat, 21 May 2005 02:51:17 GMT https://community.intel.com/t5/Intel-Integrated-Performance/encode-Jpeg-by-IJL/m-p/990504#M22245 van 2005-05-21T02:51:17Z https://community.intel.com/t5/Intel-Integrated-Performance/encode-Jpeg-by-IJL/m-p/990505#M22246 <DIV>Hi,</DIV> <DIV></DIV> <DIV>Sampling is not applicable to one channel image, because sampling by definition is changing of size of one image component related to other and can be applyed only to multi-channel images. You should use IJL_NONE for JPGSubsampling to encode one channel image.</DIV> <DIV></DIV> <DIV>Regards,</DIV> <DIV> Vladimir</DIV> Wed, 25 May 2005 01:13:38 GMT https://community.intel.com/t5/Intel-Integrated-Performance/encode-Jpeg-by-IJL/m-p/990505#M22246 Vladimir_Dudnik 2005-05-25T01:13:38Z