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Recent content by Optical Enquiry

  1. O

    New Photoshop Wiki

    Thanks. Its made teaching the subject a lot easier. There is nothing that can help you learn a topic more than writing about it.
  2. O

    New Photoshop Wiki

    Dear all, may I introduce my new Photoshop Wiki: http://opticalenquiry.com/photoshop/ I wrote it to support my digital painting course here in Singapore's School of Art Design and Media. It covers such elements of Photoshop as are useful to the digital painter. It also dips its toe into some...
  3. O

    Help needed on research project. Can Photoshop do this? We think not.

    Would you mind sending us the PS file?
  4. O

    Help needed on research project. Can Photoshop do this? We think not.

    Thanks. If you dont mind, could you expand on how you did this?
  5. O

    Help needed on research project. Can Photoshop do this? We think not.

    Thanks jn4u, you have been very helpful.
  6. O

    Help needed on research project. Can Photoshop do this? We think not.

    Well well, this is a fascinating result. Lab 'Man from Mars' We were aware of this approach. It is interesting and can indeed shift hues. However, its results are unpredictable. What happens is that it can expand the hue range in some cases but only at the cost of compressing it in others...
  7. O

    Help needed on research project. Can Photoshop do this? We think not.

    I agree, our results are not always pleasing. However they were made with an engineering community in mind and their main point is to demonstrate the technology. More subtle changes would not have made the point as clearly (to engineers). The big issue is explain to computer vision people the...
  8. O

    Help needed on research project. Can Photoshop do this? We think not.

    Thanks. None of us are photographers so our results suck somewhat. More suckiness here: Results of Hue Stretch
  9. O

    Help needed on research project. Can Photoshop do this? We think not.

    Thanks. It is good to know that it is a challenge. None of us yet are anywhere near thinking of this as a comercial venture. We we be looking for people to play with a prototype as soon as we have one (our current version only works within a specific developer environment).
  10. O

    Help needed on research project. Can Photoshop do this? We think not.

    It is clear that I have not explained myself very well. Apologies. Here is a schematic showing what I mean by hue contrast compression and expansion: Here also is some more of our results. Results of Hue Stretch Essentially, we are taking a discreet slice out of the hue spectrum and...
  11. O

    Help needed on research project. Can Photoshop do this? We think not.

    Dude... I'm just a joe. Self taught also... and still learning :) As our process is a filter, unwanted color adjustments on non-target regions are bound to appear. One of the problems with photographing such things as jungles, desert floors, rocky terrain etc is that the camera is not very...
  12. O

    Help needed on research project. Can Photoshop do this? We think not.

    Here are the Zipped files. I have edited the first post as well. 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...
  13. O

    Help needed on research project. Can Photoshop do this? We think not.

    Thank you greatly for your feedback, My understanding of Photoshop's ability to manipulate hue is this: 1. That a hue value can be made to seem more intense by editing its brightness and/or saturation. 2. That the hue values of an image can be cycled i.e. the color wheel rotated. 3. That a...
  14. O

    Help needed on research project. Can Photoshop do this? We think not.

    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...
  15. O

    looking for tutorial

    Attached is a file that shows one way of doing this.
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