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Matt Kynaston

Convert Raw to JPEG without shrinking the file

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3 hours ago, meanderingemu said:

hum, 2950x2000=5,900,000<6,000,000 so don't do such in your first submission

By the way, at the moment it's 17MB, or 5941931 pixels, the consensus is that 6,000,000 might be easier to remember!

Edited by Harry Harrison
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47 minutes ago, Harry Harrison said:

By the way, at the moment it's 17MB, or 5941931 pixels, the consensus is that 6,000,000 might be easier to remember!

 

 

thanks.  this is why i said skip on first submission  😀.  wasn't sure where the rounding was exactly

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3 hours ago, MDM said:

It could be < 6MP and still >17MB

 

The difference between  6,000,000 and 17MB is only 1% so the chance of <6,000,000 and still >17MB is quite small.  6,000,000 is also easier to remember than 5,941,931 (17MB of data converted into pixels) and easier to mentally calculate with. e.g. 3000 x 2000 = OK, and includes a small safety margin.

 

I wonder if LR/Photoshop's MB value is rounded up or down? A quick test shows it's rounded (up or down) to the nearest 0.1MB. If I create an image of 2963 * 2000, PS reports it as 17.0MB, whereas it's actually 16.954MB. A further quick test shows that the same 2,963 x 2,000 image is (correctly) rejected by the Alamy uploader as being too small (i.e. less than 17MB).

 

NB. I'm not dismissing your defence of the 17MB limit for those who have LR and know what they are doing (indeed I use a value of 17.1MB to allow for rounding errors myself). But for the rest (especially newbies) a 6,000,000 pixel limit is much easier to understand and can be applied in any image editing software. It also makes it easier to crop in PS without needing to use trial and error (it's a shame the crop tool doesn't display the before/after MB value like resize tool does - maybe you know a trick for this).

 

Mark 

 

Edited by M.Chapman
Edited to remove incorrect statement about MP
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I'm getting confused now, surely 6 MP is 6,000,000 pixels, that's certainly what camera manufacturers use? 6MB is 6,291,456 bytes.

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On 20/09/2019 at 20:23, Harry Harrison said:

I'm getting confused now, surely 6 MP is 6,000,000 pixels, that's certainly what camera manufacturers use? 6MB is 6,291,456 bytes.

 

Crikey you're right. Oops - I've spent too long in the computer world. You're right. A megabyte of data is typically* 1,048,676 bytes, whereas a megapixel is 1,000,000 pixels. I'll correct my last post and a much earlier one in this thread. THANKS!

 

*I see even in the computer world there's some variation. On this Wikipedia page https://en.wikipedia.org/wiki/Mega- it states

 

In some fields of computing, mega may sometimes denote 1,048,576 (220) of information units, for example, a megabyte, a megaword, but denotes 1000000 (106) units of other quantities, for example, transfer rates: 1megabit/s = 1000000bit/s. The prefix mebi- has been suggested as a prefix for 220 to avoid ambiguity.

 

Mark 

Edited by M.Chapman

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20 minutes ago, M.Chapman said:

Crikey you're right. Oops - I've spent too long in the computer world. You're right. A megabyte of data typically* 1,048,676 bytes, whereas a megapixel is 1,000,000 pixels. I'll correct my last post and a much earlier one in this thread. THANKS!

 

*I see even in the computer world there's some variation. On this Wikipedia page https://en.wikipedia.org/wiki/Mega- it states

 

In some fields of computing, mega may sometimes denote 1,048,576 (220) of information units, for example, a megabyte, a megaword, but denotes 1000000 (106) units of other quantities, for example, transfer rates: 1megabit/s = 1000000bit/s. The prefix mebi- has been suggested as a prefix for 220 to avoid ambiguity.

 

So now when we start quantum that will be . . .

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3 minutes ago, jodyko said:

 

So now when we start quantum that will be . . .

 

Would life have been simpler if the human race had evolved with 8 digits on their hands and so had developed a base 8 (octal) counting system (instead of base 10) in the first place?

 

Mark

Edited by M.Chapman

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1 minute ago, M.Chapman said:

Would life have been simpler if the human race had evolved with 8 digits on their hands and so had developed a base 8 (octal) counting system (instead of base 10) in the first place?

 Wow!

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32 minutes ago, M.Chapman said:

 

Crikey you're right. Oops - I've spent too long in the computer world. You're right. A megabyte of data typically* 1,048,676 bytes, whereas a megapixel is 1,000,000 pixels. I'll correct my last post and a much earlier one in this thread. THANKS!

 

*I see even in the computer world there's some variation. On this Wikipedia page https://en.wikipedia.org/wiki/Mega- it states

 

In some fields of computing, mega may sometimes denote 1,048,576 (220) of information units, for example, a megabyte, a megaword, but denotes 1000000 (106) units of other quantities, for example, transfer rates: 1megabit/s = 1000000bit/s. The prefix mebi- has been suggested as a prefix for 220 to avoid ambiguity.

 

Mark 

 

Yes this is very confusing. It seems that the old usage has been deprecated and a megabyte is now a simple decimal 1,000,000 bytes whereas a mebibyte now refers to the older octal definition. I strongly advocate using a readout from whatever software one is using and not worrying about any of this. Imagine the confusion - it's bad enough as it is. 😀

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12 minutes ago, M.Chapman said:

 

Would life have been simpler if the human race had evolved with 8 digits on their hands and so had developed a base 8 (octal) counting system (instead of base 10) in the first place?

 

Mark

 

In an anthropocentric world perhaps but I am happy with the decimal system. Remember £sd, cwt, lbs and ounces, ergs, furlongs and perches to name a few obscure units of measurement. They still have miles, yards, degrees F and pints in some places I hear. 😀 

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deleted

Edited by MDM

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32 minutes ago, M.Chapman said:

Would life have been simpler if the human race had evolved with 8 digits on their hands and so had developed a base 8 (octal) counting system (instead of base 10) in the first place?

 

 

Perhaps this has already occurred elsewheregrey-alien-hiding-in-the-dark-G8KEGC.jpg

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Blimey... how did we get from PS to ET?...

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Well, whatever....I still think your proposed 6,000,000 pixel (6 MP) rule has a nice ring to it!

Edited by Harry Harrison
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Quote

In an anthropocentric world perhaps but I am happy with the decimal system. Remember £sd, cwt, lbs and ounces, ergs, furlongs and perches to name a few obscure units of measurement. They still have miles, yards, degrees F and pints in some places I hear. 😀 

Lbs and ounces still used in the US. Here in Canada, horse racing is still in furlongs (1/8th mile) and Canadian Football is in yards not metres. A lot of cooking is still done is ounces, cups, teaspoons etc.

 

Jill

Edited by Jill Morgan
Corrected quote

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Who knows, we might be going back to them here soon......

Edited by Harry Harrison
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34 minutes ago, Harry Harrison said:

Who knows, we might be going back to them here soon......

 

...and Microstock images will sell for farthings.

 

Mark

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13 hours ago, MDM said:

 

In an anthropocentric world perhaps but I am happy with the decimal system. Remember £sd, cwt, lbs and ounces, ergs, furlongs and perches to name a few obscure units of measurement. They still have miles, yards, degrees F and pints in some places I hear. 😀 

 

Isn't the decimal system an anthropocentric system? Why would we be counting in decimal if it wasn't for the 10 digits (8 fingers + 2 thumbs) on our hands? If our counting system had evolved around 8 digits (e.g. 6 fingers + 2 thumbs) then base 8 would have been our anthropocentric counting system and would then have aligned conveniently with a binary 2^n based system which arrived many thousands of years later. Or have I misunderstood?

 

Mark

Edited by M.Chapman

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14 hours ago, M.Chapman said:

 Or have I misunderstood?

 

Mark

 

Yes I was being literal and thinking about life in a broader sense but nothing to worry about - just rambling and being silly. I don’t know about the origin of the decimal system but I do recall a eureka moment as a small child when a teacher explained that you could multiply by 10s and just add zeros. We used to do a lot of mental arithmetic and working in decimal was so much easier that pounds shillings and pence and so on. This was in primary school before we ever touched on other bases and before I ever heard the word computer. I think all that mental arithmetic has stood me in good stead with photography. For example, I have no fear of calculating a flash exposure mentally although TTL flash is the way to go these days if speed is important. 

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On 20/09/2019 at 14:41, M.Chapman said:

 

Crikey you're right. Oops - I've spent too long in the computer world. You're right. A megabyte of data typically* 1,048,676 bytes, whereas a megapixel is 1,000,000 pixels. I'll correct my last post and a much earlier one in this thread. THANKS!

 

*I see even in the computer world there's some variation. On this Wikipedia page https://en.wikipedia.org/wiki/Mega- it states

 

In some fields of computing, mega may sometimes denote 1,048,576 (220) of information units, for example, a megabyte, a megaword, but denotes 1000000 (106) units of other quantities, for example, transfer rates: 1megabit/s = 1000000bit/s. The prefix mebi- has been suggested as a prefix for 220 to avoid ambiguity.

 

Mark 

I’m heading for the aspirin bottle. You should warn us non-techies before posting X-rated material.

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10 hours ago, Betty LaRue said:

I’m heading for the aspirin bottle. You should warn us non-techies before posting X-rated material.

 

Yes, let's stick to the simple recommendation that images submitted to Alamy must contain 6,000,000 pixels or more. No ambiguity and no aspirin required. :)

 

Mark

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2 hours ago, M.Chapman said:

 

Yes, let's stick to the simple recommendation that images submitted to Alamy must contain 6,000,000 pixels or more. No ambiguity and no aspirin required. :)

 

Mark

 

.... but counting all those pixels is tedious!

 

Paulette

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On 21/09/2019 at 06:03, Harry Harrison said:

Who knows, we might be going back to them here soon......

Heaven forbid.

I've finally given up on the conversion to psi on the car tyres- the car's French anyway, so it's 2 or 2.2 bar now.

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1 hour ago, spacecadet said:

so it's 2 or 2.2 bar now.

I'm getting there but I'm still attached to 30 psi, must learn to go for 2.1 Bar instead. Heard a radio talk show host berating a caller for expressing distance in kilometers. Oh well.

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1 minute ago, Harry Harrison said:

 a radio talk show host berating a caller for expressing distance in kilometers.

Don't tell me, let me guess.....🙄

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