Which one of the following is NOT used to assess the quality of remote sensing image?
Show Hint
- Univariate statistics of image
- Histogram
- Multivariate statistics of image
- Swath of the image
The Correct Option is D
Solution and Explanation
Top Questions on Remote Sensing
- A remote sensing image is acquired from an IRS series satellite. Initially a two-dimensional filter with transfer function \( H(u,v) = \exp\left(\frac{-D^2(u,v)}{2D_0^2}\right) \) is applied to reduce scan line effects. Here \( D(u,v) \) is the distance from the center of the frequency rectangle, and \( D_0 \) is the cutoff frequency. Which one of the following will be the transfer function for the corresponding filter to detect the edges in the image?
- GATE GE - 2025
- Geo Informatics Engineering
- Remote Sensing
A CCD array element in a remote sensing sensor measures incoming radiation and its output voltage varies linearly between 0 V to 5 V. This voltage is converted to an 8-bit digital image using an analogue to digital convertor (ADC). The ADC has a linear response without bias or noise. If the output image pixel has a digital number of 100, the input voltage to the ADC would be __________ V (rounded off to 2 decimal places).
- GATE GE - 2025
- Geo Informatics Engineering
- Remote Sensing
Clouds appear white in optical visible spectral bands of remote sensing images due to _________ scattering.
- GATE GE - 2025
- Geo Informatics Engineering
- Remote Sensing
- A remote sensing instrument measures only in Green, Red and Near-Infrared frequency bands. The remote sensing index/indices that CANNOT be derived using data of this instrument is/are:
- GATE GE - 2025
- Geo Informatics Engineering
- Remote Sensing
- Three pixels P, Q, and R in an image are characterized by the NDVI values of +0.84, +0.01, and -0.89, respectively. Which of the following options is/are correct?
- GATE GG - 2025
- Geology and Geophysics
- Remote Sensing
Questions Asked in GATE GE exam
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 - GATE GE - 2025
- Digital Image Processing
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 - GATE GE - 2025
- Digital Image Processing
The hue, intensity and saturation values for a pixel are \( H = 0.5 \, {rad} \), \( S = 0.5 \), and \( I = 0.3 \), respectively. If the pixel is converted to RGB color model, then the value of the green pixel would be __________ (rounded off to 2 decimal places).
- GATE GE - 2025
- Color Models
- In case of normalized difference vegetation index (NDVI), which of the following statements is/are correct?
- GATE GE - 2025
- Digital Image Processing
- Which of the following statements is/are correct regarding across-track scanning sensor of an airborne optical imaging system?