Author Topic: 48MB minimum size? a joke? haha (Read 39363 times)

Peter · « **on:** February 18, 2008, 16:31 »

What the heck is this? At alamy 48mb is the minimum size? Why in the name of God? And How am I gonna achieve that? My raw file is 10MB, my jpeg 10MP is 4MB?! LOL!

araminta · « **Reply #1 on:** February 18, 2008, 17:08 »

Alamy do ask to upscale your photos using a "high quality" software (PS or better Genuine Fractal). Use bicubic algorithm.

But you have to understand that it is 48Mb UNCOMPRESSED = 16M pixels (3 bytes per pixel). The compressed JPEG is then around 5-10Mb.

Don't ask why they ask for upscaled pictures however

erwinova · « **Reply #2 on:** February 18, 2008, 19:09 »

Quote from: Chode on February 18, 2008, 16:31

What the heck is this? At alamy 48mb is the minimum size? Why in the name of God? And How am I gonna achieve that? My raw file is 10MB, my jpeg 10MP is 4MB?! LOL!

Dino...
Open your 10MP file in Photoshop and go to image - image size you will see your uncompressed file size, that's what alamy mean.

My 8mp (3mb) file around 22.8mb uncompressed.

vphoto · « **Reply #3 on:** February 18, 2008, 19:54 »

Quote from: Chode on February 18, 2008, 16:31

What the heck is this? At alamy 48mb is the minimum size? Why in the name of God? And How am I gonna achieve that? My raw file is 10MB, my jpeg 10MP is 4MB?! LOL!

It was also a headache for me. Finally I got Geniune Fractals and did upsizing without further thinking. Keep upsizing within 48-52MB, bigger size may be rejected.

Peter · « **Reply #4 on:** February 19, 2008, 02:57 »

couldnt they do that fot themself, to spare us uploading such large files! it takes 1 hour to upload 1 file. of.... I will upload entire portfolio in 100 years at that pace.

I quit Alamy....

erwinova · « **Reply #5 on:** February 19, 2008, 03:32 »

We have to clarify this,
from what I know that 48mb uncompressed is not JPG file size.
is that correct?

It's different between size of JPG file and uncompressed file, right?
Dino.. may be you missing something.

My 51mb uncompressed is only 4.3mb in jpg file.

araminta · « **Reply #6 on:** February 19, 2008, 03:37 »

Alamy is macrostock, not micro: this is another beast and has its own rules.

You cannot expect to be paid 100 times micro commission without a few extra constraints

I'm new to Alamy and never had any sale yet (my portfolio is tiny), but I like this site because I feel it is another approach of stock photography.

I will try to build here a portfolio with photo that do not sell well on micro sites, not because they are not good, but because they are not aimed at microstock business.

Peter · « **Reply #7 on:** February 19, 2008, 06:53 »

what is uncompressed file? what extension does it have? jpg? bmp?

I dont see anything about MBs, in Image size dialog:

confused....

null · « **Reply #8 on:** February 19, 2008, 06:55 »

Quote from: Chode on February 19, 2008, 02:57

couldnt they do that fot themself, to spare us uploading such large files! it takes 1 hour to upload 1 file. of.... I will upload entire portfolio in 100 years at that pace.

It takes about 30% more time to upload to Alamy. The size is the picture size, not the jpg size. A Nikon D200 shot upsized 131% gives 49MB picture size and about 3-8MB (depending on complexity - overwhites are less) in file size. I use Photoshop CS2-3 bicubic smoother for upsize, and make sure your DPI is 300 minimum.

Piece of cake, but only use shots that are perfectly in focus and preferably with prime lenses. The reason Alamy can't do it is that some shots, when upsized, are really substandard, and you as photographer should judge what to upload and what not. You can't expect Alamy to inspect ALL shots at 100%. They just take samples now and then.

araminta · « **Reply #9 on:** February 19, 2008, 08:17 »

Quote from: Chode on February 19, 2008, 06:53

what is uncompressed file? what extension does it have? jpg? bmp?
I dont see anything about MBs, in Image size dialog:

In any RGB 8bits format (which is always the case when saving pictures for microstock), each pixel require 3 bytes of storage: one byte for each color (R, G, B).

48Mb uncompressed is independant of the final file format (extension): it represents 48Mb of storage = 16M pixels.

So you need a 16M pixels image (Width x Height), that's it. This is the Pixel Dimension displayed in the Image Size dialog: it must be 16M or higher.

When you save this picture in JPEG, the file size will be smaller because JPEG is a compressed format. The exact size will depend on the picture. It's usually between 5 and 10Mb. but it may be more or less. No precise rule here.

Read_My_Rights · « **Reply #10 on:** February 19, 2008, 09:05 »

Actually the pixel dimensions number tells you exactly if your file is either above 48M or below because THAT is the number that matters to Alamy. Come on people how hard can it be to understand the concept of uncompressed file size. 4100x4100 pixels=48.1M or 5014x3343=48M. And the answer is NO - 48M is not a joke. The next time you want to fill a wall with a picture even 48M might not be large enough.

araminta · « **Reply #11 on:** February 19, 2008, 09:41 »

Quote from: Read_My_Rights on February 19, 2008, 09:05

And the answer is NO - 48M is not a joke. The next time you want to fill a wall with a picture even 48M might not be large enough.

It is still a joke here as Alamy will accept 4Mp pictures upscaled to 16Mp (they do not check for picture quality AFAIK). There should not be any noticeable difference to print on a wall the original 4Mp or the upscaled 16Mp picture. All will depend on the upscale algorithm used when printing the picture.

I would understand if Alamy would ask for true 16Mp photos, but in this case, there will not be a lot of contributors as 16Mp sensors are available only in high end cameras.

stokfoto · « **Reply #12 on:** February 19, 2008, 09:53 »

Quote from: araminta on February 19, 2008, 09:41

It is still a joke here as Alamy will accept 4Mp pictures upscaled to 16Mp

nope! they would not accept upscaled 4mp files they require at least 6mp files original size and it is obvious it needs to be DSLR too otherwise an upscaled image from a P&S camera would fail the quality standards.
it was announced by Alamy they'd enhance their QC test and review every single images like in micro agencies very soon.it is also expected to fasten review process too.in my opinion it would make them more strict too

vphoto · « **Reply #13 on:** February 19, 2008, 09:58 »

Quote from: stokfoto on February 19, 2008, 09:53

Quote from: araminta on February 19, 2008, 09:41
It is still a joke here as Alamy will accept 4Mp pictures upscaled to 16Mp
nope! they would not accept upscaled 4mp files they require at least 6mp files original size and it is obvious it needs to be DSLR too otherwise an upscaled image from a P&S camera would fail the quality standards.
it was announced by Alamy they'd enhance their QC test and review every single images like in micro agencies very soon.it is also expected to fasten review process too.in my opinion it would make them more strict too

good news. I was reluctant to send to them more because of a long approval time. I think Alamy makes much sense, since one though rare sale can earn more than a month at most sites (except SS and iStock (even iStock does not do it for me yet ).

erwinova · « **Reply #14 on:** February 19, 2008, 19:19 »

Quote from: Chode on February 19, 2008, 06:53

what is uncompressed file? what extension does it have? jpg? bmp?

I dont see anything about MBs, in Image size dialog:

confused....

just take attention to pixel dimensions size, if reach 48M or more you are ready to alamy.

rosta · « **Reply #15 on:** February 20, 2008, 05:24 »

Quote from: stokfoto on February 19, 2008, 09:53

Quote from: araminta on February 19, 2008, 09:41
It is still a joke here as Alamy will accept 4Mp pictures upscaled to 16Mp
nope! they would not accept upscaled 4mp files they require at least 6mp files original size and it is obvious it needs to be DSLR too otherwise an upscaled image from a P&S camera would fail the quality standards.
it was announced by Alamy they'd enhance their QC test and review every single images like in micro agencies very soon.it is also expected to fasten review process too.in my opinion it would make them more strict too

Actually about half the images I have on Alamy were taken with a Canon A630, sharpening and contrast set to zero in the camera, then upsized.

araminta · « **Reply #16 on:** February 20, 2008, 05:36 »

Quote from: erwinova on February 19, 2008, 19:19

just take attention to pixel dimensions size, if reach 48M or more you are ready to alamy.

Correct: I was wrong. The pixel dimension is already displayed in Mb and not in Mp

Peter · « **Reply #17 on:** February 20, 2008, 17:22 »

so, you say file does not have to be 48MB (size on disk), but 48 megapixels in size? that could be, say, 15 MB (megabytes) on disk?

Peter · « **Reply #18 on:** February 20, 2008, 17:26 »

So you say, this image is (in terms of size) OK for alamy:

?

But those are not MB (140), but MP!

araminta · « **Reply #19 on:** February 20, 2008, 17:33 »

Almost correct, but false

It is 48Mb uncompressed = 16M pixels. Your example is in fact far too large (there is an upper limit at Alamy, but I don't remember it right now). You should have 48M instead of 140.9M in Pixel Dimension.

Concerning the file size, don't bother: some 48Mb files will result in 2Mb JPEG and other in 15Mb JPEG.

madelaide · « **Reply #20 on:** February 20, 2008, 17:34 »

No, 48MB uncompressed. Save it as a TIFF and you will see it. PSP shows it at the bottom status bar, also in the image info window - maybe PS has an equivalent?

A 3888x2592pix (10.1Mpix) image is 28.8MB. A 3072x2304pix (7.1Mpix) image is 20.2MB.

Roughly a 5025x3350pix image will be 48MB.

Regards,
Adelaide

Peter · « **Reply #21 on:** February 20, 2008, 17:47 »

uper limit is 200 mb

so, let me get this straight: I should save this jpeg in tiff format, and upload tiff file?

erwinova · « **Reply #22 on:** February 20, 2008, 20:25 »

you can not sent tiff file but JPG only, upsize your image to 3400x5100 (51M uncompressed) save as JPG highest quality, let see how big they are, and send it to alamy.

Peter · « **Reply #23 on:** February 21, 2008, 03:07 »

jpeg is not uncompressed format. it is compressed. I am confused about this. When I save 3400x5100 image, it is about 6-7 megabytes on disk size. Is it OK? If it is, than no problem at at all....

araminta · « **Reply #24 on:** February 21, 2008, 03:58 »

Quote from: Chode on February 21, 2008, 03:07

jpeg is not uncompressed format. it is compressed. I am confused about this. When I save 3400x5100 image, it is about 6-7 megabytes on disk size. Is it OK? If it is, than no problem at at all....

Yes, this is OK: a 3400x5100 picture = 17M pixels = 52Mb uncompressed. When saved in JPEG which is actually a lossy compressed format you get a smaller file (here 6-7 Mb) and this is just fine

Just to clarify a point: when Alamy says they want a 48Mb picture uncompressed, you have to understand "we want a 48Mb picture when uncompressed but we want you to compress it in JPEG when submitting it".

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Author Topic: 48MB minimum size? a joke? haha (Read 39363 times)

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