Data Format Applet
Instructions:
- This applet shows how the digital representation of an image is transformed into a visual representation.
- The panel on the left side gives control over data format parameters, the panel on the right on imaging parameters.
- Left panel: Load any of the grayscale image files. Explore how the visual "interpretation" of the digital data stream depends on parameters specifying the image format (the "Default" button will set all parameters to adequate values). Play with the "Bits per Pixel", "Width" and "Height" values and observe "raster shift" effects.
- Right panel: The ramp function in the top frame (red line) indicates how each pixel value is mapped onto the 256 grayscale values available on your computer monitor. Use the "Width" and "Center" sliders to change the slope and position of the ramp and observe corresponding changes in contrast and brightness of the image.
- For 16 bit images you may want to use the "Hounsfield units" switch to limit the pixel values to 12 bits
Image Files:
- mu_ct_8bit_220x220: MicroCT of terminal phalanx of a monkey; 220x200 pixel, 8bit/pixel; header size 0; 0.045mm/pix
- mri_16bit_256x256: MRI of human head; 256x256 pixel, 16bit/pixel; header size 4832; 1.562mm/pix
- ct_16bit_512x512: CT of human head; 512x512pixel; header size 194; 5120.586mm/pix, swapped
- download DataFormat.jar (e.g. to your desktop)
- execution:
- Windows / Mac : double click on icon
- shell / dos: >>java -jar DataFormat.jar
- 0. Introduction
- 1. Virtual Reconstruction
- 2. Data Representation
- 1. Virtual Reconstruction
- 3. Data Acquisition
- 4. Image Data Processing
- 5. Visualization and Interaction
- 6. Virtual Fossil Reconstruction
- 7. From VR to RV
- 8. Morphometric analysis
Available from John Wiley & Sons Virtual Reconstruction: | |
 | ISBN: 0-471-20507-9 |