What is the best quality - General Questions and Answers

Hi, I write this question " What is the best quality" between the JPG & PNG file format.
Well..... I have app "Camera FV-5" and it's let you choose catching file as these formats....
When I shot an image as jpg its about 5MB in size, but the same scene about 16MB in png... Did that mean it's best in quality.?
I know It's (png) a loosless format.
Did the quality of it's worth its big size.?
I hope the professional in file format & an experience help [emoji3].
With thanks
Sent from my LG-D855

deutsh said:
Hi, I write this question " What is the best quality" between the JPG & PNG file format.
Well..... I have app "Camera FV-5" and it's let you choose catching file as these formats....
When I shot an image as jpg its about 5MB in size, but the same scene about 16MB in png... Did that mean it's best in quality.?
I know It's (png) a loosless format.
Did the quality of it's worth its big size.?
I hope the professional in file format & an experience help [emoji3].
With thanks
Sent from my LG-D855
Click to expand...
Click to collapse
In your case, yes, a .png image is better quality than a .jpg image.

deutsh said:
Hi, I write this question " What is the best quality" between the JPG & PNG file format.
Well..... I have app "Camera FV-5" and it's let you choose catching file as these formats....
When I shot an image as jpg its about 5MB in size, but the same scene about 16MB in png... Did that mean it's best in quality.?
I know It's (png) a loosless format.
Did the quality of it's worth its big size.?
I hope the professional in file format & an experience help [emoji3].
With thanks
Sent from my LG-D855
Click to expand...
Click to collapse
As far as your matter is concerned....
From left to right, these files are: 24-bit JPG Compressed, 8-bit GIF, 8-bit PNG, Full Quality 24-bit JPG, and 24-bit PNG. Note that the file sizes increase in this same direction.
PNG is the largest image type for bigger images, often containing information you may or may not find useful, depending on your needs. 8-bit PNG is an option, but GIF is smaller. Neither are optimal options for photography, as JPG is much smaller than lossless PNG with only minimal loss of quality. And for storage of high resolution files, JPG compresses to tiny proportions, with quality loss only visible on close inspection.
In short:
PNG is good option for transparency and non-lossy, smaller files. Larger files, not so much, unless you demand non-lossy images.
GIF is largely a novelty and only useful for animation, but can produce small 8-bit images.
JPG is still the king for photographs and photo-like images on the internet, but be careful, as your file can degrade with every save.
Hope this is enough for you to get the point.
ayushbpl10

Thanks a lot, and I ( therefore) have another question :
" Did png have high range of lighting details like 0-255 as RAW file ( the jpg have just 0-100).?
Sent from my LG-D855

deutsh said:
Thanks a lot, and I ( therefore) have another question :
" Did png have high range of lighting details like 0-255 as RAW file ( the jpg have just 0-100).?
Sent from my LG-D855
Click to expand...
Click to collapse
There's nothing of that sort instead everything is manage by the bits per channel. PNG gives a much wider range of color depths, including 24-bit (8 bits per channel) and 48-bit (16 bits per channel) truecolor, allowing for greater color precision, smoother fades, etc.[25] When an alpha channel is added, up to 64 bits per pixel (before compression) are possible. This is more technical & holds importance for a photographer only.
ayushbpl10

ayushbpl10 said:
There's nothing of that sort instead everything is manage by the bits per channel. PNG gives a much wider range of color depths, including 24-bit (8 bits per channel) and 48-bit (16 bits per channel) truecolor, allowing for greater color precision, smoother fades, etc.[25] When an alpha channel is added, up to 64 bits per pixel (before compression) are possible. This is more technical & holds importance for a photographer only.
ayushbpl10
Click to expand...
Click to collapse
Thanks a lot [emoji2]
Sent from my LG-D855

Related

Which program to use for converting videos for phone?

I've got the HTC Legend and have used Doubletwist to sync and convert videos for it. It converts the videos nicely except they don't seem to be well compressed.. I used it to convert a movie and it ended up being a larger size than the original (700mb -> 800mb).
Instead of resizing it and keeping aspect ratio from 640 x 272 to 480 x 204 and letting the phone add black borders when the video plays, it added black borders itself and made it 480 x 320. Also the bitrate of the video was increased from 709 to 829 which seems unecessary.
I tried converting it also in Avidemux and got the file size smaller but it was not as high quality as the Doubletwist output.
But it seems logical that you should be able to get a smaller dimensions, same quality and smaller file size video..
What are some alternative softwares?
http://www.virtualdub.org/
Virtual dub is pretty fast, you can resize, crop, correct aspect ratios, deinterlace etc etc.
via the "filters" menu.
It's quite a minimalist piece of software, but it's transcodes very fast and has everthing you need.
Thanks, yeah I'm familiar with virtualdub.
However some of the videos I'm converting were .flv and it wasn't too happy with that. And I cant seem to find the exact right encoding options to maintain the quality DT can achieve, but also have a decent amount of compression
hmm - sounds hard to do in one pass. If you are lucky enough to have an editing package like Sony Vegas or After Effects it should be doable.
If you can bear a two -step conversion you can use this:
http://www.videohelp.com/tools/FLV_Extract
to convert FLV to AVI without loss.
Then use the encoding package of your choice to shrink the file to a phone friendly size.
Yeah I do have sony vegas, how would I do it in that?
And yeah the main problem is encoding it to be played on the phone. I can get the right format, but not perfect quality with decently low size

Which is better among JPG, PNG, and GIF?

JPG (Joint Photographic Experts Group)
JPG was a filetype developed by the Joint Photographic Experts Group (JPEG) to be a standard for professional photographers. Like the method ZIP files use to find redundancies in files to compress data, JPGs compress image data by reducing sections of images to blocks of pixels or “tiles.” JPG compression has the unfortunate side effect of being permanent, however, as the technology for the file was created for storing large photographic image files in surprisingly small spaces, and not for photo editing.
GIF (Graphics Interchange Format)
GIF, like JPG, is an older filetype, and one generally associated with the internet as opposed to photography. GIF stands for “Graphics Interchange Format” and employs the same lossless LZW compression that TIFF images use. This technology was once controversial (for patent enforcement issues) but has become an accepted format since all patents have expired.
PNG (Portable Network Graphics)
PNG stands for Portable Network Graphics (or, depending on whom you ask, the recursive “PNG-Not-GIF”). It was developed as an open alternative to GIF, which used the proprietary LZW compression algorithm discussed earlier. PNG is an excellent filetype for internet graphics, as it supports transparency in browsers with an elegance that GIF does not possess. Notice how the transparent color changes and blends with the background. Right-click the image to see. This is actually one image that is on four different background colors.
Which to use?
From left to right, these files are: 24-bit JPG Compressed, 8-bit GIF, 8-bit PNG, Full Quality 24-bit JPG, and 24-bit PNG. Note that the file sizes increase in this same direction.
PNG is the largest image type for bigger images, often containing information you may or may not find useful, depending on your needs. 8-bit PNG is an option, but GIF is smaller. Neither are optimal options for photography, as JPG is much smaller than lossless PNG with only minimal loss of quality. And for storage of high resolution files, JPG compresses to tiny proportions, with quality loss only visible on close inspection.
In short:
PNG is good option for transparency and non-lossy, smaller files. Larger files, not so much, unless you demand non-lossy images.
GIF is largely a novelty and only useful for animation, but can produce small 8-bit images.
JPG is still the king for photographs and photo-like images on the internet, but be careful, as your file can degrade with every save.
*Press thanks if you find it useful*
ayushbpl10

Problems with RAW shots?

Hi all, I tried to do some shots in RAW mode. After the shot I have two files: a JPG and a DNG. The jpg is perfect as always, but the DNG File is pixelate and it's very bad. I asked at the Honor official page and they said that's normal because I'm watching it on my smartphone and that on PC the quality would be different, but is it really normal?
To my knowledge, the phone shows just the jpg thumbnail of the raw file (since it would be quite cpu consuming to "develop" the raw data each time). So if you open the raw file in Lightroom or raw converter, it should be fine. Also if you edit the dng on the phone and save the result as jpg, the jpg quality should be ok. At least this is my experience (I use raw mode quite a lot to later edit the raw files in Lightroom).
So there's no way to see a clear image while elaborating it. I will se the good results only at the end.
What exactly do you mean by "pixelated"? And what app do you use to watch the raw image? On the Honor's builtin Gallery app the dng is quite ok quality. If you use a third-party app, it's possible that it cannot dig the best-quality preview from the dng file.
I mean this
While the jpeg is this

How to make the stock camera save pictures as png

Hello guys I would like to know if it's possible to change the format the phone saves pictures from jpg to png. I doubt samsung will optimize this phone for social media so I would like to know if there is a way to make png as the default format. The phone has the option to do this for screenshots so I think it should be possible. At the moment whenever I want to share a picture in specific I just rename it to .png and that does the trick but its annoying and I would like a solution to this.
FallenBlizzard said:
Hello guys I would like to know if it's possible to change the format the phone saves pictures from jpg to png. I doubt samsung will optimize this phone for social media so I would like to know if there is a way to make png as the default format. The phone has the option to do this for screenshots so I think it should be possible. At the moment whenever I want to share a picture in specific I just rename it to .png and that does the trick but its annoying and I would like a solution to this.
Click to expand...
Click to collapse
I want this too. Samsung saves way too much info in the jpg.
see
How to save screenshots as PNG on Samsung Galaxy phones
www.androidpolice.com
There's a good reason why png is the default for screen shots; pixel by pixel representation.
Handle your jpeg with care; always save the original if doing edits.
RAW is still the best format for photograph archives for future editing flexibility.
JPEG vs. PNG: Which Compressed Image Format Is Better? | Digital Trends
JPEG vs. PNG: Which is better? There are many differences between each format that make each better in varied situations. Learn more to determine what's best.
www.google.com
raul6 said:
see
How to save screenshots as PNG on Samsung Galaxy phones
www.androidpolice.com
Click to expand...
Click to collapse
I was referring to pictures not screenshots. I already have this setting on.
FallenBlizzard said:
I was referring to pictures not screenshots. I already have this setting on.
Click to expand...
Click to collapse
currently there is no way, even if it is technically possible, to save photos as png direct from camera. convert them or take screenshot of them
raul6 said:
currently there is no way, even if it is technically possible, to save photos as png direct from camera. convert them or take screenshot of them
Click to expand...
Click to collapse
Not needed if RAW formatting can be set.
Save in RAW format. You can convert it latter.
RAW is superior to all the other formats because it saves the most raw camera data. Up to 3 f/stops of exposure and white balance data too.
blackhawk said:
Not needed if RAW formatting can be set.
Save in RAW format. You can convert it latter.
RAW is superior to all the other formats because it saves the most raw camera data. Up to 3 f/stops of exposure and white balance data too.
Click to expand...
Click to collapse
RAW files are too large. the point of my post was to know if we can have png as an alternative to jpeg for social media use to avoid the awful compression, plus you have to be in pro mode to take RAW pictures which is kind of annoying.
FallenBlizzard said:
RAW files are too large. the point of my post was to know if we can have png as an alternative to jpeg for social media use to avoid the awful compression, plus you have to be in pro mode to take RAW pictures which is kind of annoying.
Click to expand...
Click to collapse
Yeah the lack of raw support in other modes is annoying.

Question [Resolved] DNG and JPG Resolution and File Size

I set my camera to take JPG and DNG files. One of the JPGs is 4080 x 3072 pixels, 3.6 MB and 96 dpi while the DNG file for that photo is 1280 x 964 pixels, 13.7 MB, and 96 dpi.
I am viewing them with the Photos app on my Windows 10 computer.
When I zoom into the same areas on the images, the JPG is 285% and the DNG 635%. Both images are the same size (occupy the same area) on my monitor. When I zoom into the images, the DNG is pixelated much, much more than the JPG.
I don't understand why the DNG file size is 3 times that of the JPG but the JPG has at least 4 times as much detail. Here is an example:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
It appears that the DNG has 10 MB of info that is not image-related. Can somebody please help me understand what's going on here?
DNG is a file format for raw data from the image sensor. It uses lossless compression, meaning that the compression it uses does not cause any loss of data/quality. In the context of a phone camera, this file format isn't really meant to be used as the final form or finished product. It is meant to be digitally developed in an application like Photoshop or Lightroom. By doing this the photographer is able to have more detail and information to work with and more control over the final product. Before processing, DNG images usually look a bit grainy/noisey, a bit washed out, with low contrast. DNG is used as a "Digital Negative" archival format, similar to how photo negatives were kept as master archival copies of film photos.
The JPG file that is created by your phone has already been processed to make it better by the camera software, meaning that things like contrast, color balance, saturation, sharpening, etc are already adjusted. So this can be one reason that the JPG looks better than the DNG. The JPG that is exported probably has at least some quality loss from the higher lossy compression and has less metadata. This means that if the file is adjusted or altered and saved again as a JPG the quality can degrade even more.
The DNG file should be close the to resolution of the JPG. I just compared some files of mine and the DNG is only about 16px shorter than the JPG. I am not sure of the reason for this. Maybe someone else can clear this up. DNG format can embed a JPG preview. I don't use Windows, but my guess is that maybe the image viewing program that you are using doesn't fully support DNG as is just showing the embedded JPG metadata.
Thank you for your reply.
>>I just compared some files of mine and the DNG is only about 16px shorter than the JPG.<<
Not sure how your DNG could be 16 pixels "shorter" than the corresponding JPG.
In my post I've described my photo in great detail in both its JPG and its DNG format. The DNG file is 13.7 MB and the JPG is 3.6 MB, about the same ratio as my other photos on the camera.
The DNG that I see on my screen is extremely over-sharpened. It looks like someone has gone bananas with the Sharpening function. Don't know why.
The DNG file does not contain the level of detail that is in the JPG when viewed on the screen. If you compare the leaves in the images you will notice that the leaves in the DNG are just about obliterated due to the low resolution while the same leaves in the JPG are clearly visible due to the higher resolution.)
>>The DNG file should be close the to resolution of the JPG.<<
In my experience, depending upon the content of the original TIF or DNG file, the file size of a JPG derived from a DNG file is about a tenth the size of a TIF or the DNG. Too bad there is no option for the Pixel 7 to save the photo as an uncompressed TIF.
Google has done an excellent job of creating JPGs from DNGs. Maybe what I'm seeing on my Windows 10 computer when I view a DNG file is not the full DNG but only a representation of the image used to approximate the actual photo? I dunno.
If I have misunderstood something about DNG files, perhaps somebody can chime in and show me what it is. I'd sure like to know how I can use them to create my own JPG or TIF files. If there is a program that can display the full 13.7 MB of my DNG file, I'd like to hear about it.
Skuddle said:
Not sure how your DNG could be 16 pixels "shorter" than the corresponding JPG.
Click to expand...
Click to collapse
Here is what I mean by 16px shorter. See the screenshots of the image dimensions of my JPG vs DNG below. They are roughly the same proportion, but the size difference (dimensions) is only about 0.04% in my case. So the height goes down by 16px and the width by 15px.
Spoiler
In my experience, depending upon the content of the original TIF or DNG file, the file size of a JPG derived from a DNG file is about a tenth the size of a TIF or the DNG. Too bad there is no option for the Pixel 7 to save the photo as an uncompressed TIF.
Click to expand...
Click to collapse
Oops
Yeah, I was wrong here. I was focusing at the pixel dimensions and didn't see the resolution was different. Sorry about that. In the screenshots I posted near the beginning of the post the JPG is 3072x4080 at 72dpi and the DNG is 3056x4064 at 300dpi
In my post I've described my photo in great detail in both its JPG and its DNG format. The DNG file is 13.7 MB and the JPG is 3.6 MB, about the same ratio as my other photos on the camera.
Click to expand...
Click to collapse
DNG files will usually be significantly larger in file size than a JPG of similar dimensions, because they contain more data and metadata and the lossless compression isn't as effective as a lossy compressor like JPG.
The DNG that I see on my screen is extremely over-sharpened. It looks like someone has gone bananas with the Sharpening function. Don't know why.
The DNG file does not contain the level of detail that is in the JPG when viewed on the screen. If you compare the leaves in the images you will notice that the leaves in the DNG are just about obliterated due to the low resolution while the same leaves in the JPG are clearly visible due to the higher resolution.)
Click to expand...
Click to collapse
Google has done an excellent job of creating JPGs from DNGs. Maybe what I'm seeing on my Windows 10 computer when I view a DNG file is not the full DNG but only a representation of the image used to approximate the actual photo? I dunno.
Click to expand...
Click to collapse
I think the application you are using (WIndows Photos App) doesn't properly support viewing DNG files. DNG files often have an embedded JPG image to be used as a preview. These embedded images can be used for things like image thumbnails in your operating system. The preview images is going to be smaller and lower resolution that the actual DNG data. I think you Photos app on your computer is just displaying the embedded JPG preview rather than the actual DNG data. Since DNG is sort of a specialty/proffessional file format, most photo apps just don't have full support for it.
I'd sure like to know how I can use them to create my own JPG or TIF files. If there is a program that can display the full 13.7 MB of my DNG file, I'd like to hear about it.
Click to expand...
Click to collapse
I use Adobe Lightroom to process my DNG files. Photoshop comes with the RAW plugin, which can also process them. Both of those application can get kind of expensive ,because they require a subscription. If you want something free you can try playing around with one of these:
darktable
darktable is an open source photography workflow application and raw developer
www.darktable.org
Home
rawtherapee.com
Skuddle said:
Thank you for your reply.
>>I just compared some files of mine and the DNG is only about 16px shorter than the JPG.<<
Not sure how your DNG could be 16 pixels "shorter" than the corresponding JPG.
In my post I've described my photo in great detail in both its JPG and its DNG format. The DNG file is 13.7 MB and the JPG is 3.6 MB, about the same ratio as my other photos on the camera.
The DNG that I see on my screen is extremely over-sharpened. It looks like someone has gone bananas with the Sharpening function. Don't know why.
The DNG file does not contain the level of detail that is in the JPG when viewed on the screen. If you compare the leaves in the images you will notice that the leaves in the DNG are just about obliterated due to the low resolution while the same leaves in the JPG are clearly visible due to the higher resolution.)
>>The DNG file should be close the to resolution of the JPG.<<
In my experience, depending upon the content of the original TIF or DNG file, the file size of a JPG derived from a DNG file is about a tenth the size of a TIF or the DNG. Too bad there is no option for the Pixel 7 to save the photo as an uncompressed TIF.
Google has done an excellent job of creating JPGs from DNGs. Maybe what I'm seeing on my Windows 10 computer when I view a DNG file is not the full DNG but only a representation of the image used to approximate the actual photo? I dunno.
If I have misunderstood something about DNG files, perhaps somebody can chime in and show me what it is. I'd sure like to know how I can use them to create my own JPG or TIF files. If there is a program that can display the full 13.7 MB of my DNG file, I'd like to hear about it.
Click to expand...
Click to collapse
The issue is that you're only getting a "Preview" with the DNG file hence the "low" resolution. When you open the same DNG in an editing software like Adobe PS or LR, (or any other) you will be able to work with the FULL resolution inside and edit it as you wish.
>>I think you Photos app on your computer is just displaying the embedded JPG preview rather than the actual DNG data.<<
>>The issue is that you're only getting a "Preview" with the DNG file hence the "low" resolution.<<
I think both of you are correct about the preview. Now to search for something affordable that will open a DNG and not just a preview.
Thank you both for your help! I'll download the "darktable" app and have a look.
Skuddle said:
>>I think you Photos app on your computer is just displaying the embedded JPG preview rather than the actual DNG data.<<
>>The issue is that you're only getting a "Preview" with the DNG file hence the "low" resolution.<<
I think both of you are correct about the preview. Now to search for something affordable that will open a DNG and not just a preview.
Thank you both for your help! I'll download the "darktable" app and have a look.
Click to expand...
Click to collapse
Gimp can do it and it is free last I checked.
"darktable" doesn't work for me (tried, and uninstalled it).
Anyways, I fiddled around, trying this and that and was able to successfully open the DNG at its full resolution using Irfanview. For those who are interested, here's what I did:
I opened Irfanview and clicked on "Options", then on "Property Settings".
I clicked "PlugIns" at the bottom of the page. A "PlugIns" window opened.
"Try to load embedded preview..." at the top of the PlugIns window was checked, so I unchecked it and clicked "Okay".
I loaded a DNG file. It loaded at full resolution (i.e. no preview JPG!)
I saved the file as a TIF using "Save as" and was then able to open the TIF in my prehistoric Photoshop 7 app.

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