Hi, I've tried the image with jpgicc and it comes fine, so the issue comes from somewhere else. I would check the destination profile: which one are you using? On jpgicc I've used built-in sRGB and it is ok, but I can see diffent colors on skin tones, bride dress, etc.
BTW, converting individual pixels is slow... if you can convert a big block, or even scanline at time, you will get a big throughput improvement. Regards Marti Original Message: ----------------- From: Adam Olson olsona...@gmail.com Date: Wed, 20 Apr 2011 11:02:30 -0500 To: lcms-user@lists.sourceforge.net Subject: [Lcms-user] Transform problems with LCMS in AS3/Alchemy Hey list members, I've been working on porting LCMS to Alchemy so I can convert Adobe RGB to sRGB. I've got everything working except it's not transforming properly. I can send it the ICC profile from the .jpg file and it will read it correctly. I can send data to C and it seems to be in the right order (A, R, G, B. No endian problems it seems). It seems to read everything properly, but the final transformed image comes out incorrect. If anyone could let me know if the transform code I'm using is wrong that would be great! Here's the original image http://nothotbutspicy.com/jpghelp/adobeRGB.jpg Here's the image I get from LCMS http://nothotbutspicy.com/jpghelp/sRGB%20(without%20profile).jpg This is the code I'm using to convert (sourceImageStream is a FILE* created from an Alchemy ByteArray of Flash BitmapData. DestImageStream is the same. Flash BitmapData is stored as ARGB_8. size_amt is number of bytes in the sourceImageStream) cmsHTRANSFORM hTransform = cmsCreateTransform(sourceProfile, TYPE_ARGB_8, destProfile, TYPE_ARGB_8, INTENT_PERCEPTUAL, 0); unsigned char *bufferSourceARGB = (unsigned char*)malloc(sizeof(unsigned char) * argb_pixel_size); while(bytesRead < size_amt) { bytesRead += fread(bufferSourceARGB, 1, argb_pixel_size, sourceImageStream); cmsDoTransform(hTransform, bufferSourceARGB, bufferSourceARGB, 1); bytesWritten += fwrite(bufferSourceARGB, 1, argb_pixel_size, destImageStream); } Thanks for your help! Adam -------------------------------------------------------------------- mail2web LIVE – Free email based on Microsoft® Exchange technology - http://link.mail2web.com/LIVE ------------------------------------------------------------------------------ Benefiting from Server Virtualization: Beyond Initial Workload Consolidation -- Increasing the use of server virtualization is a top priority.Virtualization can reduce costs, simplify management, and improve application availability and disaster protection. Learn more about boosting the value of server virtualization. http://p.sf.net/sfu/vmware-sfdev2dev _______________________________________________ Lcms-user mailing list Lcms-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lcms-user
