How does the resolution of a bitmap affect the quality of the image?
The quality however, when the bitmap is displayed or printed does depend on the resolution. Since the resolution determines the size of a pixel it can also be used to modify the size of the overall image. As an example consider one bitmap which is 200 pixels horizontally and 100 pixels vertically.
What’s the difference between 8 bit and 16 bit RGB?
This is identical to 8 bit colour except now only half a byte, 4 bits are used for the index. This supports a table of up to 16 colours. 32 bit RGB This is normally the same as 24 bit colour but with an extra 8 bit bitmap known as an alpha channel. This channel can be used to create masked areas or represent transparency. 16 bit RGB
What’s the difference between 0 and 255 in RGB?
In each component the value of 0 refers to no contribution of that colour, 255 refers to fully saturated contribution of that colour. Since each component has 256 different states there are a total of 16777216 possible colours. This idea of RGB colour space is a fundamental concept in computer graphics.
How many bytes are needed for each row in a bitmap?
If this was to be stored in RAW form it would need 16 bytes per row for all 10 rows. However the first two rows are all the same level so it is more efficient to simply save the number of same colours in a run along with the run colour. The first two rows instead of needing 16 bytes only need 2 bytes each.
How to calculate the size of a bitmap?
For example, if you have a 4-by-5-inch, 1-bit image at 300 ppi, you know that the file size is 220 K (300 2 x 4 x 5 x 1 ÷ 8192). A 24-bit image of the same size would be 5,273 K (just about 5 MB). In case you were wondering, this formula works because 8,192 is the number of bits in a kilobyte.
How big is a 24 bit image in KB?
For example, if you have a 4-by-5-inch, 1-bit image at 300 ppi, you know that the file size is 220 K (300 2 x 4 x 5 x 1 ÷ 8192). A 24-bit image of the same size would be 5,273 K (just about 5 MB).
The quality however, when the bitmap is displayed or printed does depend on the resolution. Since the resolution determines the size of a pixel it can also be used to modify the size of the overall image. As an example consider one bitmap which is 200 pixels horizontally and 100 pixels vertically.
How does increasing bit depth increase file size?
Increasing bit depth increases file size by a simple multiplier. Therefore, a 24-bit image is three times as large as an 8-bit image, and 24 times as large as a 1-bit image. Image mode doesn’t necessarily increase file size, but going from RGB (24-bit) to CMYK (32-bit) mode does.
