Digital Image Processing
12 previous year questions.
High-Yield Trend
Chapter Questions 12 MCQs
In the grid below, the four corners A, B, C and D are the pixel locations on an image. The brightness values at pixels A, B, C and D are 10, 20, 5 and 30, respectively. Using bilinear interpolation, the brightness value determined at point P is ................. (Rounded off to 1 decimal place). 
The value at the center pixel of the image at (1) obtained after applying the filter given at (2) is .................. 
The error matrix resulting from randomly selected test pixels for a classified image is given below. The Producer’s accuracy of class 1 is __________ % (rounded off to 1 decimal place).
| Reference Data | |||||
|---|---|---|---|---|---|
| Class 1 | Class 2 | Class 3 | Class 4 | ||
| Classified Data | Class 1 | 320 | 8 | 7 | 3 |
| Class 2 | 12 | 270 | 6 | 2 | |
| Class 3 | 9 | 6 | 410 | 5 | |
| Class 4 | 14 | 2 | 3 | 350 | |
The brightness values of four pixels in the input image are shown in the table below. The image is rectified using nearest neighbor intensity interpolation, and the pixel at location in the output image is to be filled with the value from coordinate in the input image. The brightness value of the pixel at location in the rectified output image is __________ (Answer in integer).
| Location of pixels in input image (Row, Column) | Brightness Value |
|---|---|
| (5, 3) | 9 |
| (5, 4) | 11 |
| (6, 3) | 14 |
| (6, 4) | 12 |
The error matrix resulting from randomly selected test pixels for a classified image is given below.
The Producer’s accuracy of class 1 is % (rounded off to 1 decimal place).
| Reference Data | |||||
|---|---|---|---|---|---|
| Class 1 | Class 2 | Class 3 | Class 4 | ||
| Classified Data | Class 1 | 320 | 8 | 7 | 3 |
| Class 2 | 12 | 270 | 6 | 2 | |
| Class 3 | 9 | 6 | 410 | 5 | |
| Class 4 | 14 | 2 | 3 | 350 | |
The brightness values of four pixels in the input image are shown in the table below. The image is rectified using nearest neighbor intensity interpolation, and the pixel at location (5, 4) in the output image is to be filled with the value from coordinate (5.3, 3.7) in the input image. The brightness value of the pixel at location (5, 4) in the rectified output image is 11. (Answer in integer)
| Location of pixels in input image (Row, Column) | Brightness Value |
|---|---|
| (5, 3) | 9 |
| (5, 4) | 11 |
| (6, 3) | 14 |
| (6, 4) | 12 |
About Digital Image Processing - GATE-GE
Digital Image Processing is a vital chapter for GATE-GE aspirants. Mastering the concepts covered in this chapter is essential for securing a top rank.
By rigorously practicing the previous year questions associated with this chapter, you can identify high-yield topics, understand the examiner's perspective, and boost your confidence during the actual exam.
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Review the topic breakdown to see which sub-topics within Digital Image Processing carry the most weight. Then, tackle the questions iteratively to solidify your understanding.