Colin Manning Munster Technological University: Digital Images

Showing posts with label Digital Images. Show all posts

Tuesday, March 4, 2014

COMP6023 DNET1/COM1c Class 22

I did a quick recap of HSB, RGB, Lab

We looked at CMYK.

We looked at Indexed colour and palette selections for different images.

COMP6021 Class 21

the one with all the colours

Image digitization

HSB
RGB

We looked at some more at the RGB colour system. Then we examined the Lab colour system and saw how subsampling the colour comment of an image was not as noticeable as subsampling the luminance component.

We looked at the CMYK system used in printing.

[Recoding failed]

I spoke a bit about image compression. I explained image subsampling and interpolation.

We began to look at pixel depth reduction when my laptop failed. We will pick up again from this point in the next class.

COMP6023 DWEB1/ITM1 Class 21

We looked at digitising black & white images and considered the impact the sample rate (dpi) and number of quantisation level (bit per pixel) have on the quality.

We looked at the HSB & RGB colour systems

COMP6021/COMP6023 Image Submampling

When an image is subsampled the missing pixels have to be accounted for by the receiver. This can be accomplished by increasing the size of the pixels that are present, or by interpolating the missing pixels. The different is illustrated in these images. You need to click on them to see them at full size.