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# CSC253 Computer Graphics Assignment No. 1 Solution and Discussion Spring 2014 Comsats Virtual Campus Due Date: April 11, 2014

CSC253 Computer Graphics Assignment No. 1 Solution and Discussion Spring 2014 ComsatsVirtual Campus Due Date: April 11, 2014

Assignment # 1

Computer Graphics

Q.1: Write a detailed survey of display devices used in contemporary graphics systems.

Q.2: What are various file formats for graphic file storage? Explain their characteristics.

Q.3: What are scalars and vectors? Describe scalar and vector operations with examples.

Q.4: What are photopic and scotopic vision. Explain them in context of human visual system.

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### Replies to This Discussion

five most common image formats for the web and computer graphics: JPEG, GIF, BMP, TIFF and PNG.

What are scalars and vectors?

Scalars are quantities that are fully described by a magnitude (or numerical value) alone.
Vectors are quantities that are fully described by both a magnitude and a direction.

Photopic vision of the eye under good light conditions approach . In humans and many other animals , photopic cone cells mediated by Color vision care , vision and scotopic a significantly higher compared with the available visual acuity and temporal resolution allows .

Three bands of color in the human eye to notice the light uses three types of cones . Biological pigments cone about 420 NM ( blue ), 534 NM ( blue -green ), RESP wavelength of maximum absorption values ​​. 564 NM ( yellowish green). Their sensitivity ranges across the spectrum have a common vision to provide . The maximum utility 555 NM ( green) wavelength of 683 lm / W is

Scotopic vision under low light conditions eye view. Opia meaning a condition of the period of darkness and skotos comes from the Greek meaning . Human eye cone cells are nonfunctional in low light - scotopic vision 498 NM ( greenish-blue ) wavelengths of light around the most sensitive and about 640 NM ( red ) wavelengths than indifference exclusively through rod cells that is produced .

Scotopic vision 10-2 to 10-6 cd / m² at the LUMINANCE occurs . Other species in low-light conditions, the colors are not blind . Elephant Hawk Moth (Deilephila elpenor) advanced color discrimination in the dim starlight shows .

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