# I want to look into something. how do i extract a 8bit and view it
**URL:** https://discourse.processing.org/t/i-want-to-look-into-something-how-do-i-extract-a-8bit-and-view-it/10316
**Category:** Coding Questions
**Created:** [April 16, 2019, 1:00am UTC](https://discourse.processing.org/t/i-want-to-look-into-something-how-do-i-extract-a-8bit-and-view-it/10316 "2019-04-16T01:00:16Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@octaminotin](https://discourse.processing.org/u/octaminotin)
#### Post date: [April 16, 2019, 1:00am UTC](https://discourse.processing.org/t/i-want-to-look-into-something-how-do-i-extract-a-8bit-and-view-it/10316/1 "2019-04-16T01:00:16Z")
i got this in p5.js
{dot.operator
function setup1() {
createCanvas(400, 500);
b = true
b = canvas
function draw() {
background(220);
}
{ if (image is loaded)
b = true
b = canvas}
---
### Author:  [@kll](https://discourse.processing.org/u/kll)
#### Post date: [April 16, 2019, 1:08am UTC](https://discourse.processing.org/t/i-want-to-look-into-something-how-do-i-extract-a-8bit-and-view-it/10316/2 "2019-04-16T01:08:22Z")
again, please format your code in
```auto
code tag
```
and make it an example we can run here in processing IDE
-B- the question is related to what? not to this code?
much more explanation is needed.
---
### Author:  [@octaminotin](https://discourse.processing.org/u/octaminotin)
#### Post date: [April 16, 2019, 1:31am UTC](https://discourse.processing.org/t/i-want-to-look-into-something-how-do-i-extract-a-8bit-and-view-it/10316/3 "2019-04-16T01:31:52Z")
o wait, it would be from the graphics, this is up for scrutiny then.
---
### Author:  [@kll](https://discourse.processing.org/u/kll)
#### Post date: [April 16, 2019, 1:40am UTC](https://discourse.processing.org/t/i-want-to-look-into-something-how-do-i-extract-a-8bit-and-view-it/10316/4 "2019-04-16T01:40:06Z")
as you can not post code here, possibly it is better we just work online together,
show / link us a **running** code in
[https://editor.p5js.org/](https://editor.p5js.org/)
and ask your question in detail again.
---
### Author:  [@octaminotin](https://discourse.processing.org/u/octaminotin)
#### Post date: [April 16, 2019, 1:40am UTC](https://discourse.processing.org/t/i-want-to-look-into-something-how-do-i-extract-a-8bit-and-view-it/10316/5 "2019-04-16T01:40:46Z")
lb t,off(b) # $t \<— Sign-extended byte
# from memory address b+off
# b is a base register.
# off is 16-bit two’s complement.
i fount this for example
---
### Author:  [@kll](https://discourse.processing.org/u/kll)
#### Post date: [April 16, 2019, 1:53am UTC](https://discourse.processing.org/t/i-want-to-look-into-something-how-do-i-extract-a-8bit-and-view-it/10316/6 "2019-04-16T01:53:31Z")
if you want the color information from a loaded image
on a specific pixel location
can use the 2 ways mentioned here:
[https://p5js.org/reference/#/p5/get](https://p5js.org/reference/#/p5/get)
---
### Author:  [@octaminotin](https://discourse.processing.org/u/octaminotin)
#### Post date: [April 17, 2019, 12:33am UTC](https://discourse.processing.org/t/i-want-to-look-into-something-how-do-i-extract-a-8bit-and-view-it/10316/7 "2019-04-17T00:33:45Z")
i invented this some how.
it changes the page let me see if i can provide the same outcome
how would i measure it. in crosh i would think using the help functions, are there p5 notes out there.
{dot.operator
function setup1() {
---
### Author:  [@jeremydouglass](https://discourse.processing.org/u/jeremydouglass)
#### Post date: [April 20, 2019, 12:32am UTC](https://discourse.processing.org/t/i-want-to-look-into-something-how-do-i-extract-a-8bit-and-view-it/10316/8 "2019-04-20T00:32:24Z")