OCR GCSE Computing: Images - Topic 11 [OLD COURSE]

Images are represented by computers in binary and this video shows in basic how images are converted to digital and several other important details such as colour depth, resolution and metadata.

[harveytrounson]

I acknowledge these videos are over a year old, but i would still like to thank you for the hard work you have done for us all helping us all out :P

[ShaddowDude]

I acknowledge these videos are over two years old, but i would still like to thank you for the hard work you have done for us all helping us all out :P

[adamj]

When your computing teacher only focussed on coursework nd didn't teach you anything so, the night before the exam you watch this dudes video. Thanks you're legit the only thing that's gonna let me get that A grade

[Ichigogirlxx]

You have literally saved my life! I have mocks coming up and without these videos I may well have failed. Thank you so much!

[benjb]

so much quicker and easier than reading through a book. Thanks

[ayooloruntade]

Thank you for making these videos. Really helpful. I will spread awareness for sure.

[robe]

HI, great videos. Just to note that the colour depth combinations isn't quite right, as a nibble has 16 combinations (0 to 15), so is 16^3 for RGB, therefore 4096 possible colours. Likewise for the 24 bit, it's 256^3, not 255^3, giving 16, 777, 216 possible colours. Cheers.

[larahall]

These are so good, thank you so much for making them!!! x

[adnanmiah]

Emm, that short pause after BNP... Thanks for the videos, really appreciate them. Exam tomorrow :(

[matt-dw]

5:00 but what if you zoom the image in? An inch is a constant measurement, so zooming in would change the resolution, according to this. The resolution has to be the total number of pixels, regardless of the size of the image. According to this, a 2160p image on a 30" screen would have a much lower resolution than a 360p image on a 1" screen because of the pixels per inch, therefore being much less detailed, but this is not true.

[jksed]

I dont understand what you mean at 2:20 with the little side note talking about how we need to know how to calculate the binary combinations. Would you please be able to show me an example and how I go about it?

(These vids are great by the way, thanks for sharing your knowledge with us!)

[xWeasel]

your videos are great, keep it up :D
but i noticed you didn't go through machine code/little man computer that came up in last years' exam, so could you possibly create a video on that please? thanks :]

[samcadogan]

Explain the need for metadata to be included in the file such as height, width and colour depth, i don't understand what the need of metadata is though??

[trinidemships]

So is the Resolution on an image better quality because of the better detail it holds?

[Abbas.]

Do you know when you're going to upload Sound - Topic 12?

[joshofto]

2x2^(n-1) and 2^n are the same thing :P

[abdelnur]

can I say resolution is the concentration of pixels

[mesbajalal]

can someone help me with lossy and lossless images

[prototypeAds]

Doesn't lossless and lossy compression come up?

[savannatoolis]

When your computing teacher only focussed on coursework nd didn't teach you anything so, the night before the exam you watch this dudes video. Thanks you're legit the only thing that's gonna let me get that A grade