IMAQ flatten image for the 64-bit version of string

Hello

I noticed customer odd based on vision "flatten image chain" on labview 64-bit edition. In my program I use flatten image to the string (with compression to JPEG and kind of flatten Image) to compress and send data to another application. I noticed on the compressed image color missmatch. I say red (255,0,0) 32-bit RGB image and I flattened for string and then save this string as a binary JPEG using Write to vi. When I open the file of the picture is blue (0,0,255). It doesen't matter how data is written (big endian, little endian or native) the result is always the same. 32-bit edition Labview, the code worked correctly.

I reported a bug in the NC and I'm still waiting for a solution to this problem.

LabVIEW: labview professional development system 2010 32/64 bits (with vision development module) completely v10.0f2 lie

Systems: labview 64 bit on windows 7 64 bit-> flatten image to string-> false color

LabVIEW 32-bit on windows 7 64 bit-> flatten image to String-> colors OK

LabVIEW 32-bit on windows 7 32 bit-> flatten image to String-> colors OK

A picture of the block diagram that I used to test the conversion is attached.

See you soon

Hi 3DVision.

I think I see the problem... you code looks like he expects that out of "flattening the image of the chain" will actually be a JPG file as a string, because you have chosen to use the JPG compression options. However, this is not the way that VI is intended to be used. It is simply a way to convert an image type of Vision in a string representation which can be easier to haul around (for example via the network, the user file format, etc.). It is a parallel to normal 'flatten' that can be used on any type of data from LabVIEW. The format of this string is the owner and has provisions for storing information that is specific to the Vision images that cannot be represented in the file formats normal image (overlay information, benchmarking, custom, etc. data info). If you are save the string flattened in a file and expects to open as a normal JPG file, it is unlikely to work properly. The only way that it would be guaranteed to work is if you switch to the corresponding VI "unflatten chain. I don't know why it works in 32-bit mode, but it sounds like a lucky fluke.

For your use case, you probably want to use the VI "IMAQ write the string. This does not give a result string that is identical to the specified file format.

Eric

Tags: NI Hardware

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