- An imitation from real is known as simulation.
- The participating systems may be abstract or physical.
- A specific modeling can well be supported by simulation.
- By simulation, acquiring and getting information is simple and quick.
2. Do you know some compression technique used by GIF image format?
GIF images use the following compression techniques:
- Lossless Compression: Statistical redundancy is exploited for representing data in more concise manner.
- Real-world data consists of statistical redundancy.
- Lampel-Ziv Compression: One of the most popular algorithms.
- Compression process is slow.
- It implements table-based compression, in which the table entries are substituted to repeat the strings of data.
- The table is encoded using Huffman encoding.
- Animation is referred to rapid display of a set of 2D images in a sequence.
- It creates an illusion of movement of objects / displays.
- Most common animation method is a motion picture.
- Full animation is referred to producing high quality motion pictures.
- Limited animation involves less stylized drawings and methods.
4. Explain what is Ambient occlusion?
- Ambient Occlusion is related to bright the light to shine on specific surfaces.
- AO is based on the environment of the surface.
- The calculation is done by casting rays in each and every direction from the surface.
- The brightness is increased on the surface by focusing the rays from the background.
- Points with little geometry will appear light on the visible hemisphere.
5. Tell me about Beneton Movie GIF that creates animated images?
- Beneton Movie GIF allows to create GIF images for greeting cards.
- BM GIF animation maker is full featured software that is simple to use and create GIF images.
- Any image file can be taken as an input file and can be converted to 48 animated file formats.
- Among all, GIF format file creation is well suited for presentations.
6. Tell me what is Graphic Interchange Format?
- GIF is a format of bitmap image.
- It supports maximum of 8 BPP.
- It allows a single image to be referenced as a palette.
- Each palette has up to 256 colors to choose from.
- The RGB color space is about 24 bits.
7. Can you explain how to optimize an animated GIF?
- Using fewer colors allows reducing the file size.
- Limiting colors and using similar colors from frame to frame.
- To decrease the file size, one more method is to cut down the pixel dimensions.
- The number of frames should be the exact number for the specified animation.
- Identify the file reduction feature in the software that creates GIF image files.
- Implement dithering. Dithering reduces the banding. The image appears smoother by eliminating colors.
8. Please compare PNG and GIF?
GIF Format:
- LZW compression standards are used in GIF images.
- Traces the colors of the image and reduces the size of the file.
- Best suited for simple animated graphics on the web.
PNG Format:
- PNG(Portable Network Graphics) is a graphic file format for lossless compression.
- It is suitable for raster images storage.
- Indexed-color, grayscale and true color images are supported in PNG format.
- Supports cross platform image brightness and color correction.
9. Please differentiate between Animation and Video?
Animation:
- Animation involves drawing of sketches of objects.
- These objects are placed in various frames, so that it illustrates as if the objects are moving.
- Animation is created by drawing series of illustrations in different angles.
- Animation creation is difficult compared to creating a video.
Videos:
- Videos are made by using video cameras.
- The real movements of objects are captured by shooting the videos.
- Manual intervention is not necessary to shoot.
10. Explain what is Persistence of Vision?
- A phenomenon of the eye.
- By this an after image is persisted approximately 1/20th of a second on the retina.
- Human perception of motion is the end result of vision persistency.
- Visual form of memory that is referred as Iconic Memory is the cause of Persistence of Vision.
- The persistence of vision has two distinct illusions - 1. Phi Phenomenon and 2. Beta Movement.
