However if you change the method to exposure and gamma this destruction goes away (at least in the images I used). The normal local adaption method in HDR Toning can again radically change the data.
#16 bit image converter 32 bit
HDR Toning can be a useful option but Alan wasn't sure why it's necessary when converting from 32 bit to 16 bit. This display brightening isn't necessary when you convert a 16 bit image to 32 bits since the display gamma doesn't need to change - again exactly what I've seen. Depending on how bright the astro image is the user might not notice the change or might see a significant improvement or might (especially if DDP was used) see the image destroyed. To display 32 bit data it has to raise the data's gamma on the display from 1 to 2.2 - a significant increase. However, Photoshop assumes 32 bit data is linear or has a gamma of 1. Photoshop assumes 16 bit data has a gamma of 2.2 the same as a Windows display. He provided a great explanation of what appears to be happening. I just got back from the imaging conference (NEAIC) where I asked every expert I could corner about this issue. I posted this question on ccd-newstro a few days ago but no one could help. How do I convert to 16 bit format without destroying my images?
#16 bit image converter 64 Bit
Interestingly I get a totally different behavior if I convert a 16 bit image to 32 bits rather than open a 32 bit file with fitsplug.įrom my discussions with Eddie, it seems that most people using 64 bit Photoshop with his plugin convert the data to 16 bit format and then continue normal processing. I get a similar destruction if I try to apply 2 iterations of HDR Toning to an image, so perhaps I'm getting a "free" HDR Toning when I first bring in the 32 bit image and another when I convert to a 16 bit format. However, this HDR Toning screen totally destroys other images and a I can't find any setting that prevents this destruction. With some images I can find a combination of settings that work ok and then I can continue processing in the 16 bit format. When I try to convert to a 16 bit format I get the HDR Toning screen. However, there isn't much I can do beyond this without converting the data into a 16 bit format. Apparently Photoshop does something similar automatically with 32 bit images since now I get largely processed image to start with.
#16 bit image converter series
I used to have to apply a series of curves/levels to convert a largely black astro image to something useful. The new version brings the data in with Photoshop's 32 bit format. I upgraded to the latest version of fitsplug to get 64 bit capability. Now I've moved on to the 64 bit version of Photoshop (CS5). Online Image to Vector converter - vectorize your image.
Convert an image to grayscale using custom weights. Online image converter include 4 type converter: Online Image to Image converter based on ImageConverter Plus, this converter can convert files in various image formats - more than 260 image formats and over 800 format dialects save your images. (0.21Red + 0.72Green + 0.07Blue) User-defined Weights Check this to use custom image to grayscale conversion weights.
For years I've used Eddie Trimarchi's great fitsplug routine to transfer my 32 bit IEEE format fit files from MaxIm to Photoshop's 16 bit format (CS3). ITU-R BT.709 Formula Convert image to grayscale by using HDTV method.
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