Mm Quiz3 Sol
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F.4 C.I.T.Module D – Image
1
Module D – Image Quiz Time Allowed: 10 minutes Name: 1.
Mark: Class:
/20 4A (
Complete the table: Colour Mode Black and White Grayscale 256 Indexed Colour True Colour
No. of colours 2 256 256 224
Colour Depth 1 bit 8 bits 8 bits 24 bits
2.
What are the magnitudes of the three components of the colour #556677? Red: 85 Green: 102 Blue: 119
3.
Suggest a graphic file format for the following characteristics: (a) Bitmap, uses indexed colour, supports animation: GIF (b) Supports different degree of transparency and true colour: PNG (c) Uses mathematical model to store objects: SVG / SWF / AI (d) Lossy compression, high compression ratio: JPG
4.
When enlarging a vector graphics, the quality of the image remains unchanged. When enlarging a bitmap graphics, the quality will increase / decrease / remain unchanged.
5.
For a 640 x 480 24-bit uncompressed bitmap: Number of pixels = 307200 Colour Depth = 24 Image Size = 307200 x 24 = 7372800 bits = 0.8789 MB The file is saved as a JPEG.. The final file size is 500KB. Compression Ratio = Uncompressed Size / Compressed Size = 900 / 500 = 1.8 END
)
1
Module D – Image Quiz Time Allowed: 10 minutes Name: 1.
Mark: Class:
/20 4A (
Complete the table: Colour Mode Black and White Grayscale 256 Indexed Colour True Colour
No. of colours 2 256 256 224
Colour Depth 1 bit 8 bits 8 bits 24 bits
2.
What are the magnitudes of the three components of the colour #556677? Red: 85 Green: 102 Blue: 119
3.
Suggest a graphic file format for the following characteristics: (a) Bitmap, uses indexed colour, supports animation: GIF (b) Supports different degree of transparency and true colour: PNG (c) Uses mathematical model to store objects: SVG / SWF / AI (d) Lossy compression, high compression ratio: JPG
4.
When enlarging a vector graphics, the quality of the image remains unchanged. When enlarging a bitmap graphics, the quality will increase / decrease / remain unchanged.
5.
For a 640 x 480 24-bit uncompressed bitmap: Number of pixels = 307200 Colour Depth = 24 Image Size = 307200 x 24 = 7372800 bits = 0.8789 MB The file is saved as a JPEG.. The final file size is 500KB. Compression Ratio = Uncompressed Size / Compressed Size = 900 / 500 = 1.8 END
)
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