Podcast
Questions and Answers
What is the primary goal of the compression process in image and video files?
What is the primary goal of the compression process in image and video files?
- To convert all images to BMP format
- To increase the file size for better quality
- To separate chromatic and achromatic channels
- To make the file smaller and reduce storage requirements (correct)
Why is the YCbCr color space used in JPEG compression?
Why is the YCbCr color space used in JPEG compression?
- Because it is more compatible with computer monitors
- Because it is a more widely used color space than RGB
- Because it is a patented color space
- Because it separates achromatic and chromatic channels, allowing for subsampling (correct)
What is the result of subsampling the chromatic components in JPEG compression?
What is the result of subsampling the chromatic components in JPEG compression?
- Reducing the amount of bit allocated to the image (correct)
- Reversing the order of the color channels
- Converting the image to grayscale
- Increasing the amount of bit allocated to the image
Why are humans more sensitive to differences in brightness than to differences in color?
Why are humans more sensitive to differences in brightness than to differences in color?
What is the benefit of reducing the file size of an image or video file?
What is the benefit of reducing the file size of an image or video file?
What is the tradeoff for reducing the file size of an image or video file?
What is the tradeoff for reducing the file size of an image or video file?
What is the primary purpose of the zigzag scan in JPEG compression?
What is the primary purpose of the zigzag scan in JPEG compression?
If we want a higher compression ratio and lower image quality, what should we do?
If we want a higher compression ratio and lower image quality, what should we do?
What is the purpose of DPCM encoding in JPEG compression?
What is the purpose of DPCM encoding in JPEG compression?
What is the effect of normalization on the DCT coefficients?
What is the effect of normalization on the DCT coefficients?
What is the relationship between the quality level and the compression ratio in JPEG compression?
What is the relationship between the quality level and the compression ratio in JPEG compression?
What is the purpose of quantization in JPEG compression?
What is the purpose of quantization in JPEG compression?
What is the primary purpose of adding 128 to the image values in the JPEG compression process?
What is the primary purpose of adding 128 to the image values in the JPEG compression process?
What is the compression ratio if the size of the original image is 32768 bytes and the size of the compressed image is 15632 bytes?
What is the compression ratio if the size of the original image is 32768 bytes and the size of the compressed image is 15632 bytes?
What is the effect of increasing the compression ratio on the image quality?
What is the effect of increasing the compression ratio on the image quality?
What is the purpose of applying the Fourier transform to an image in the JPEG compression process?
What is the purpose of applying the Fourier transform to an image in the JPEG compression process?
What is the relationship between artifacts and compression ratio in the JPEG compression process?
What is the relationship between artifacts and compression ratio in the JPEG compression process?
In the JPEG compression process, what is the purpose of quantizing the image values?
In the JPEG compression process, what is the purpose of quantizing the image values?