Given several corrupted images, use a hex editor such as FRHED or xvi32 to find out what is wrong with them and make corrections. The corrected images should be displayable on Imaging for Windows. For each image, describe:
Location of the bytes changed
Original value
Corrected value
Meaning of the field and the change.
week2_1) Use file badpaste.bmp
week2_2) Use file badrose.bmp
week2_3) Look at the
file editUndo.bmp, which is in uncompressed
format. The first few bytes are at
locations 0x76 - 0xe5. Convert this part
of the bitmap to 4-bit RLE.
week2_4) Draw a graph representing a sine wave with
period 2 milliseconds. Suppose that you
sample the sine wave every 1.2 ms.
a) Plot the original
signal, the sample points, and the aliased signal.
b) What is the period
of the aliased signal?
c) What are the
frequencies of the original and aliased signals?
