CIS 410/510 Project 3

• Here is the PDF of the instructions.
• Here is a beginning VTK program.
• Here is a data file that project3 requires (i.e., proj3_data.vtk). Make sure it is in the same directory you invoke your executable from.
• Here is the bluehot.png output.
• Here is the difference.png output.
• Here is the hsv.png output.

Image Differencer

This image differencing program can help you verify that your images are correct.

Directions:

• Make a directory called "differencer"
• Download the file differencer.cxx
• The easiest way to do CMake is probably to adapt your own.
• Run CMake in the differencer directory.
• Compile the program.
• Run the program. Add the two images to compare as arguments as you run.
• The program will (i) congratulate you, or (ii) tell you the images are not the same size, or (iii) output a difference map.

Debugging

Here are some print statements from my code. I am looping over all 500x500 pixels, with the columns as I and the rows as J. These print statements are for I==367, J==99, and this is what I got for the point location, the field, the normalized field, and applying the blue hot color map

• PT = 4.23848, -5.42886
• Got an F of 3.58282
• Normalized F = 0.623776
• (Blue hot) RGB as float: 0.623776, 0.623776, 0.811888
• (Blue hot) RGB as unsigned char: 159, 159, 207

(note that printing unsigned chars can get wonky and the best thing to do is cast them to ints as you print them.)