How To Calculate JPG Data As It Loads From The Input Stream
How To Calculate JPG Data As It Loads From The Input Stream
I need to calculate RGB pixel data from a JPG file on demand. In other words, I cannot load the whole image. I need to open the stream, skip to the information I need, and ultimately return an array of RGB information I need.
I want to extract all the compression information I need, and use it to go after a specific targeted pixel.
The programming language I need to implement this in is JAVA. Is there any classes/APIs that will help me achieve this? Or do I need to create my own JPGInputStream?
java frameworks jpeg
edited Nov 15 '18 at 4:52
JGlass
9972720
asked Nov 14 '18 at 18:44
user1780932user1780932
4117
migrated from cs.stackexchange.com Nov 14 '18 at 18:46
This question came from our site for students, researchers and practitioners of computer science.
add a comment |
How To Calculate JPG Data As It Loads From The Input Stream
I need to calculate RGB pixel data from a JPG file on demand. In other words, I cannot load the whole image. I need to open the stream, skip to the information I need, and ultimately return an array of RGB information I need.
I want to extract all the compression information I need, and use it to go after a specific targeted pixel.
The programming language I need to implement this in is JAVA. Is there any classes/APIs that will help me achieve this? Or do I need to create my own JPGInputStream?
java frameworks jpeg
edited Nov 15 '18 at 4:52
JGlass
9972720
asked Nov 14 '18 at 18:44
user1780932user1780932
4117
migrated from cs.stackexchange.com Nov 14 '18 at 18:46
This question came from our site for students, researchers and practitioners of computer science.
See if this Q&A helps you out what is the best java image processing library approach
– JGlass
Nov 14 '18 at 19:09
add a comment |
How To Calculate JPG Data As It Loads From The Input Stream
I need to calculate RGB pixel data from a JPG file on demand. In other words, I cannot load the whole image. I need to open the stream, skip to the information I need, and ultimately return an array of RGB information I need.
I want to extract all the compression information I need, and use it to go after a specific targeted pixel.
The programming language I need to implement this in is JAVA. Is there any classes/APIs that will help me achieve this? Or do I need to create my own JPGInputStream?
java frameworks jpeg
edited Nov 15 '18 at 4:52
JGlass
9972720
asked Nov 14 '18 at 18:44
user1780932user1780932
4117
How To Calculate JPG Data As It Loads From The Input Stream
I need to calculate RGB pixel data from a JPG file on demand. In other words, I cannot load the whole image. I need to open the stream, skip to the information I need, and ultimately return an array of RGB information I need.
I want to extract all the compression information I need, and use it to go after a specific targeted pixel.
The programming language I need to implement this in is JAVA. Is there any classes/APIs that will help me achieve this? Or do I need to create my own JPGInputStream?
java frameworks jpeg
java frameworks jpeg
edited Nov 15 '18 at 4:52
JGlass
9972720
asked Nov 14 '18 at 18:44
user1780932user1780932
4117
edited Nov 15 '18 at 4:52
JGlass
9972720
asked Nov 14 '18 at 18:44
user1780932user1780932
4117
edited Nov 15 '18 at 4:52
JGlass
9972720
edited Nov 15 '18 at 4:52
JGlass
9972720
edited Nov 15 '18 at 4:52
JGlass
9972720
9972720
asked Nov 14 '18 at 18:44
user1780932user1780932
4117
asked Nov 14 '18 at 18:44
user1780932user1780932
4117
asked Nov 14 '18 at 18:44
user1780932user1780932
4117
4117
migrated from cs.stackexchange.com Nov 14 '18 at 18:46
This question came from our site for students, researchers and practitioners of computer science.
migrated from cs.stackexchange.com Nov 14 '18 at 18:46
This question came from our site for students, researchers and practitioners of computer science.
See if this Q&A helps you out what is the best java image processing library approach
– JGlass
Nov 14 '18 at 19:09
add a comment |
See if this Q&A helps you out what is the best java image processing library approach
– JGlass
Nov 14 '18 at 19:09
See if this Q&A helps you out what is the best java image processing library approach
– JGlass
Nov 14 '18 at 19:09
See if this Q&A helps you out what is the best java image processing library approach
– JGlass
Nov 14 '18 at 19:09
add a comment |
1 Answer
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If your JPEG stream contains a sequential frame, you could decode each scan (usually 1, 3, or 4) as they arrive and display them. It would look pretty funky color wise.
If your JPEG stream contains a progressive frame, you could also decode after each scan. In that case the progression would be pretty normal.
This kind of approach was great in the days of dialup internet where it could take minutes to download a single image. These days, there tends to be little value in it.
answered Nov 15 '18 at 12:37
user3344003user3344003
14.7k31538
add a comment |
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1 Answer
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1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
If your JPEG stream contains a sequential frame, you could decode each scan (usually 1, 3, or 4) as they arrive and display them. It would look pretty funky color wise.
If your JPEG stream contains a progressive frame, you could also decode after each scan. In that case the progression would be pretty normal.
This kind of approach was great in the days of dialup internet where it could take minutes to download a single image. These days, there tends to be little value in it.
answered Nov 15 '18 at 12:37
user3344003user3344003
14.7k31538
add a comment |
If your JPEG stream contains a sequential frame, you could decode each scan (usually 1, 3, or 4) as they arrive and display them. It would look pretty funky color wise.
If your JPEG stream contains a progressive frame, you could also decode after each scan. In that case the progression would be pretty normal.
This kind of approach was great in the days of dialup internet where it could take minutes to download a single image. These days, there tends to be little value in it.
answered Nov 15 '18 at 12:37
user3344003user3344003
14.7k31538
add a comment |
If your JPEG stream contains a sequential frame, you could decode each scan (usually 1, 3, or 4) as they arrive and display them. It would look pretty funky color wise.
If your JPEG stream contains a progressive frame, you could also decode after each scan. In that case the progression would be pretty normal.
This kind of approach was great in the days of dialup internet where it could take minutes to download a single image. These days, there tends to be little value in it.
answered Nov 15 '18 at 12:37
user3344003user3344003
14.7k31538
If your JPEG stream contains a sequential frame, you could decode each scan (usually 1, 3, or 4) as they arrive and display them. It would look pretty funky color wise.
If your JPEG stream contains a progressive frame, you could also decode after each scan. In that case the progression would be pretty normal.
This kind of approach was great in the days of dialup internet where it could take minutes to download a single image. These days, there tends to be little value in it.
answered Nov 15 '18 at 12:37
user3344003user3344003
14.7k31538
answered Nov 15 '18 at 12:37
user3344003user3344003
14.7k31538
answered Nov 15 '18 at 12:37
user3344003user3344003
14.7k31538
answered Nov 15 '18 at 12:37
user3344003user3344003
14.7k31538
14.7k31538
add a comment |
add a comment |
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See if this Q&A helps you out what is the best java image processing library approach
– JGlass
Nov 14 '18 at 19:09