Optical Enquiry
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Dear Photoshop Guru forum users,
My name is Martin Constable and I am research professor at Nanyang Technological University in Singapore. I have a problem that, hopefully, will present something of a challenge. We are working on the topic of hue contrast, which is something that we feel Photoshop isn't very good at. What is hue contrast? Consider a tree whose leaves range in hue from blue-green to yellow-green. A hue contrast stretch would pull these values out so that they extend fully from yellow to blue. A hue contrast compress would reduce the range of hue values to a single value (e.g. all blue-green).
The attached two images hopefully show what I mean. These were made using software that we are developing and we would love to have the help of the Photoshop community in testing our assumption that Photoshop is not able to perform such functions. Our challenge: using Photoshop, can anyone reproduce our results? The original (rather large) files are here:
Hue contrast compress target:
http://dl.dropbox.com/u/3788380/compress_target.tif.zip
Hue contrast compress result:
http://dl.dropbox.com/u/3788380/compress_result.tif.zip
Hue contrast spread target:
http://dl.dropbox.com/u/3788380/spread_target.tif.zip
Hue contrast spread result:
http://dl.dropbox.com/u/3788380/spread_result.tif.zip
My name is Martin Constable and I am research professor at Nanyang Technological University in Singapore. I have a problem that, hopefully, will present something of a challenge. We are working on the topic of hue contrast, which is something that we feel Photoshop isn't very good at. What is hue contrast? Consider a tree whose leaves range in hue from blue-green to yellow-green. A hue contrast stretch would pull these values out so that they extend fully from yellow to blue. A hue contrast compress would reduce the range of hue values to a single value (e.g. all blue-green).
The attached two images hopefully show what I mean. These were made using software that we are developing and we would love to have the help of the Photoshop community in testing our assumption that Photoshop is not able to perform such functions. Our challenge: using Photoshop, can anyone reproduce our results? The original (rather large) files are here:
Hue contrast compress target:
http://dl.dropbox.com/u/3788380/compress_target.tif.zip
Hue contrast compress result:
http://dl.dropbox.com/u/3788380/compress_result.tif.zip
Hue contrast spread target:
http://dl.dropbox.com/u/3788380/spread_target.tif.zip
Hue contrast spread result:
http://dl.dropbox.com/u/3788380/spread_result.tif.zip
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