Image compressing apparatus, image compressing method and program
First Claim
1. An image compressing apparatus carrying out code amount control upon JPEG2000 coding, in which a number of coding passes and a code amount for each code block generated by a MQ (arithmetic) coder are input, and a number of coding passes and a code amount are determined based on a first code amount control standard and a second code amount control standard given for each code block, comprising:
- a part using, for a specific code block, the second code amount control standard to determine the number of coding passes and the code amount, and using, for the other code blocks, the first code amount control standard to determine the number of coding passes and the code amount.
1 Assignment
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Accused Products
Abstract
An image compressing apparatus carrying out code amount control upon JPEG2000 coding, in which the number of coding passes and a code amount for each code block generated by a MQ (arithmetic) coder are input, and the number of coding passes and the code amount are determined based on a first code amount control standard and a second code amount control standard given for each code block. For a specific code block, the second code amount control standard is used to determine the number of coding passes and the code amount, while, for the other code blocks, the first code amount control standard is used to determine the number of coding passes and the code amount.
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Citations
11 Claims
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1. An image compressing apparatus carrying out code amount control upon JPEG2000 coding, in which a number of coding passes and a code amount for each code block generated by a MQ (arithmetic) coder are input, and a number of coding passes and a code amount are determined based on a first code amount control standard and a second code amount control standard given for each code block, comprising:
a part using, for a specific code block, the second code amount control standard to determine the number of coding passes and the code amount, and using, for the other code blocks, the first code amount control standard to determine the number of coding passes and the code amount. - View Dependent Claims (2, 3, 4, 5)
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6. An image compressing method for carrying out code amount control upon JPEG2000 coding, in which a number of coding passes and a code amount for each code block generated by a MQ (arithmetic) coder are input, and a number of coding passes and a code amount are determined based on a first code amount control standard and a second code amount control standard given for each code block, comprising the steps of:
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a) using, for a specific code block, the second code amount control standard to determine the number of coding passes and the code amount; and
b) using, for the other code blocks, the first code amount control standard to determine the number of coding passes and the code amount. - View Dependent Claims (7, 8, 9, 10)
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11. A program for image compressing comprising instructions to cause a computer to carry out code amount control upon JPEG2000 coding, in which a number of coding passes and a code amount for each code block generated by a MQ (arithmetic) coder are input, and a number of coding passes and a code amount are determined based on a first code amount control standard and a second code amount control standard given for each code block, said program further comprising instructions to cause the computer to:
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use, for a specific code block, the second code amount control standard to determine the number of coding passes and the code amount; and
use, for the other code blocks, the first code amount control standard to determine the number of coding passes and the code amount.
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Specification