Legacy ImageMagick Discussions Archive

Hi, thanks for your version 6.8.2-3 from 03-Feb-2013. Reading the UInt16 sample FITS images from my previous posting now works better. After converting these sample images to tif, they look similar to the original images. Here I used two FITS test images, one unsigned 16 bit integer and the other on...

Hi, thanks for your version 6.8.2-2 from 30-Jan-2013 20:53. If you read a FITS image which was created by ImageMagick, the problem is solved now. But FITS supports a couple of sub formats. Loading 16 Bit Uint FITS images still does not work, Images become much brighter when being loaded with ImageMa...

Hi, I just tried the new beta version 6.8.2-2 from 29-Jan-2013 13:47, compiled it successfully. Still the same problem, that means after convert test.tif test.fits convert test.fits test2.tif ... test2.tif is much brighter than test.tif. My 16 bit test image is here: https://www.dropbox.com/s/bvl89t...

Hi, thanks for the upgrade. I downloaded ImageMagick-6.8.2-0-windows.7z 26-Jan-2013 19:39 and compiled it, which resulted in 6 build errors, the first being in magick\distribute-cache.c (MSG_NOSIGNAL is undeclared). Since IM_MOD_RL_fits_.dll did compile successfully, I copied all DLLs which were bui...

Hi, thanks for the upgrade, I just gave it a try. In fact the image data changed. But it is still wrong. Now, images are not too bright any more, but too dark. For a test I used a 16 bit tif image you can download here: https://www.dropbox.com/s/bvl89thijf2jqbo/test.tif If you write: convert test.ti...

Unfortunately, colorspace is not the problem. If it was, image data would be non linear and would start at 0 for black. But in fact it is linear and starts at 0x5555 (which was black=0x8000 in the FITS file, but now some gray value because of the bug). But forget theory, just make a test: convert te...

Hi, I'm using Magick++ to read FITS files. I have lots of test images from Fitswork, PixInsight, ImageTOOLScs and ImageMagick itself. Currently I'm testing the 16 bit signed format (BITPIX=16). In this case you normally have (like e. g. PixInsight does) BZERO=32768 BSCALE=1 This achieves that the si...