spectral color imaging
DESCRIPTION
SPECTRAL COLOR IMAGING. Jussi Parkkinen Markku Hauta-Kasari IPCV 2006 August 23 th , 2006 Budapest, Hungary. Color image formation in human eye. Reproduction of color images on displays. Display characterictics. Laptop, white color on display. Color Gamut presented by. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/1.jpg)
SPECTRAL COLOR IMAGING
Jussi ParkkinenMarkku Hauta-Kasari
IPCV 2006August 23th, 2006
Budapest, Hungary
![Page 2: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/2.jpg)
Color image formation in human eye
![Page 3: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/3.jpg)
Reproduction of color images on displays
![Page 4: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/4.jpg)
![Page 5: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/5.jpg)
Display characterictics
![Page 6: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/6.jpg)
Laptop, white color on display
350 400 450 500 550 600 650 700 750 8000
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6x 10
-3 valkoinen kannettava
![Page 7: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/7.jpg)
![Page 8: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/8.jpg)
Multiprimary color displays
Conventional LCD 4-primary Flat-panel LCD2x2-tiled, 2000x2000pixels rear-projection6-primary display
Stacked front-projection 6-primary DLP display
y
x
Visible Color for Human Eye
Color Gamut presented by Multiprimary color display
Color Gamut presented by RGB display system
![Page 9: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/9.jpg)
RGB-filters
High and low pass filters
Multiprimary display
6 filters for
![Page 10: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/10.jpg)
Literature• Wyszecki and Stiles: Color Science. John Wiley & Sons,
2000.– The “Bible” of Color Science. Not new anymore, but basics of
standard color science and basics of color are valid material.• Roy Berns: Billmeyer and Saltzman's principles of color
technology. John Wiley & Sons, New York (NY), 2000.– Good and clear introduction to the color and related technologies.
• Hardeberg: Acquisition and reproduction of color images : colorimetric and multispectral approaches. Dissertation.com, 2001 – Jon Yngve’s PhD thesis, good overview on spectral approach and
some methods there.• Mark Fairchild: Color Appearance Models. Addison
Wesley, Reading (MA), 1998.– Explains methods to be used for reproduction of colors to look
correct
![Page 11: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/11.jpg)
SPECTRAL IMAGE APPLICATIONSJussi Parkkinen
Markku Hauta-Kasari
IPCV 2006August 23th, 2006
Budapest, Hungary
![Page 12: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/12.jpg)
Applications areas of spectral imaging• Medical imaging, telemedicine*
• Cultural heritage study and digital museums*
• Paper industry*
• Printing industry*
• Textile industry• eCommerce• Plastic industry*
• Cosmetic industry• Display technology*
![Page 13: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/13.jpg)
Testimage for printing quality test (newspaper)
![Page 14: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/14.jpg)
Some sample spectra for original and print
![Page 15: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/15.jpg)
Example: printing inks and measurement
![Page 16: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/16.jpg)
Example: spectral measurements
Same ink in same paper(different amount of ink)
![Page 17: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/17.jpg)
Comparison between pre-print and print
pre-print print
color difference
![Page 18: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/18.jpg)
Mean reflectance spectra (Jacket)Mean whole image
Ref
lect
ance
pre-print
![Page 19: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/19.jpg)
Examination of metameric inkCourtesy by Yoichi Miyake
Color image With long pass filter>645nm
Passport of Japan (Personal page)
![Page 20: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/20.jpg)
Example of fluorescent colors
![Page 21: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/21.jpg)
Examples: color characterization
![Page 22: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/22.jpg)
Videoconferencing using web-cam
![Page 23: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/23.jpg)
Webcam color correction
Original image Color calibrated image
![Page 24: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/24.jpg)
Simulation of illuminant change
![Page 25: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/25.jpg)
Spectral component images (400, 550,
700 nm)
![Page 26: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/26.jpg)
Church
![Page 27: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/27.jpg)
Observation of Spectral Reflectance
OriginalOnceTwiceThree Times
![Page 28: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/28.jpg)
Example of co-operation with local industry: Tulikivi Co. Ltd. Crevice analysisImage optimization for a screen
![Page 29: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/29.jpg)
IMAGE OF ORIGINAL SAMPLE
IMAGE OF SRGB-REPRODUCTION
ON CRT DISPLAY
IMAGE OF METAMERICCOLOR REPRODUCTION
ON CRT DISPLAY
Figure 3Figure 3. . Differences between original and metameric reproduction (especially lower and upper parts)
are because of uneven illumination of the original sample when picture was taken.
Figure 4Figure 4. . Original printed sample in the middle.
![Page 30: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/30.jpg)
Spectral imaging of displays
On the left ImSpector spectral camera and a 45 degree angle mirror. On the right HP laptop display and Nokia cellular phone display.
![Page 31: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/31.jpg)
Spectral images transformed into sRGB
Laptop LCD display Cellular phone display
![Page 32: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/32.jpg)
Principal component analysis of spectral images
1-4
Laptop LCD display Cellular phone LCD display
5-8
9-12
1316
17 20
![Page 33: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/33.jpg)
Acquiring of spectral face images
![Page 34: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/34.jpg)
Part of the database
![Page 35: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/35.jpg)
![Page 36: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/36.jpg)
![Page 37: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/37.jpg)
Spectral color enhancementapplied to “psoriasis vulgaris”
natural color Enhancement (550nm band)
• Skin lesion apparently visualized by spectral color enhancement
![Page 38: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/38.jpg)
Creation of color surface coating for gray level objects
•Colors of cherries, red apples and a blue pen were picked and used for coloring the cylinder.
![Page 39: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/39.jpg)
CCDcamera
AOTF
Lens
Halogen Lamp (pole)
Plants
Experimental setup
no_ozoneozone
![Page 40: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/40.jpg)
Before ozone exposure ( 0 hours)
Slide14
ozone exp
visible RED 59 hours
ozone exp
4 hours
⊿NIR had remarkable change in parts where visible damage occurred
3
3invisible NIR
![Page 41: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/41.jpg)
Measurement of soybeanEmission Wavelength (LCTF)
400nm 410nm 600nm
350n
m
Exc
itat
ion
Wav
elen
gth
(G
rati
ng
)
360n
m57
0nm
Total 273 imagesTotal 273 images
Excitation-Emission Matrix
SpectralIlluminator
Spectral Imager
XenonLamp
Grating
Micro-slicer
3D Spectral 3D Spectral Imaging SystemImaging System
CCD
LCTF
Measured at National Food Reserch Institute
![Page 42: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/42.jpg)
Result
Proposed method
spectral image
digital camera image
![Page 43: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/43.jpg)
Sugar Content Map(Assoc Prof S. Nakauchi Toyohashi U of Tech, Japan)
知覚画像 糖度分布可視化画像 BrixMelon0726_28- 1
7
891011121314
15
知覚画像 糖度分布可視化画像 BrixMelon0726_27
7
891011121314
15
![Page 44: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/44.jpg)
Multispectral microscopic image capturing system16-band, 2k x 2k pixels / channel
![Page 45: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/45.jpg)
16-band multispectral camera for still image
Multispectral cameras
6-band HDTV camera for motion picture
![Page 46: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/46.jpg)
Spectral video
• Sequence of spectral images
• Shown as movie on the screen
• Very high memory requirements
• Efficient compression needed
• Shown as RGB or multiprimary
![Page 47: SPECTRAL COLOR IMAGING](https://reader036.vdocuments.site/reader036/viewer/2022081506/56814fa3550346895dbd60ee/html5/thumbnails/47.jpg)
AcknowledgementResearchers in Joensuu Color Group
andDr. P. Laihanen Helsinki U of Tech, FinlandAssoc Prof Y. Manabe NAIST, JapanProf Y Miyake Chiba University, JapanDr. Miyata National Museum of Japan HistoryDr. K. Miyazawa Toyohashi U of Tech, JapanAssoc Prof S. Nakauchi Toyohashi U of Tech, JapanProf G. Nyman University of Helsinki, FinlandMr. E. Torniainen M-Real Company, FinlandAssoc Prof N. Tsumura Chiba University, JapanAssoc Prof M. Yamaguchi Natural Vision Center, Japan