Out call rgb2ycbcr function in matlab is smaller than formula to calculate the 16 with ycbcr2rgb com-CodePudding

Is the most useful matlab calculate formula instead of calling rgb2ycbcr and ycbcr2rgb and why ycbcr2rgb output is a???????
I=imread (' C: \ Users \ WHM \ Desktop \ test \ ucid2 \ ucid00005 tif ');
I=double (I);
YCBCR=rgb2ycbcr (I);
RGB=ycbcr2rgb (YCBCR);

CodePudding user response:

http://www.ilovematlab.cn/thread-106551-1-1.html

CodePudding user response:

YUV and YCbCr conversion formula is not the same,

* Analog
R * Y=0.299 + 0.114 + 0.587 G B
* U R=0.147-0.289 G + 0.436 B
* V R=0.615 to 0.515 G - 0.100 B
* the ITU - R BT. 601
* Y? ˉ R=0.257 * '+ 0.504 * G + 0.098 * B' + 16
* Cb 'R=0.148 * 0.291 * G' + 0.439 * B + 128
* Cr 'R=0.439 * 0.368 * G - 0.071 * B + 128

CodePudding user response:

refer to the second floor lark studio response:

YUV and YCbCr conversion formula is not the same,

* Analog
R * Y=0.299 + 0.114 + 0.587 G B
* U R=0.147-0.289 G + 0.436 B
* V R=0.615 to 0.515 G - 0.100 B
* the ITU - R BT. 601
* Y? ˉ R=0.257 * '+ 0.504 * G + 0.098 * B' + 16
* Cb 'R=0.148 * 0.291 * G' + 0.439 * B + 128
* Cr 'R=0.439 * 0.368 * G' - 0.071 * B + 128

Could you tell me the color space conversion should after the integer?

CodePudding user response:

reference qq_40348659 reply: 3/f

Quote: refer to the second floor lark studio response:

YUV and YCbCr conversion formula is not the same,

* Analog
R * Y=0.299 + 0.114 + 0.587 G B
* U R=0.147-0.289 G + 0.436 B
* V R=0.615 to 0.515 G - 0.100 B
* the ITU - R BT. 601
* Y? ˉ R=0.257 * '+ 0.504 * G + 0.098 * B' + 16
* Cb 'R=0.148 * 0.291 * G' + 0.439 * B + 128
* Cr 'R=0.439 * 0.368 * G' - 0.071 * B + 128

Could you tell me the color space conversion should after the integer?

According to the needs of storage and application, a common format is need to take the whole

CodePudding user response:

reference 4 floor zgl7903 response:

Quote: reference qq_40348659 reply: 3/f

Quote: refer to the second floor lark studio response:

YUV and YCbCr conversion formula is not the same,

* Analog
R * Y=0.299 + 0.114 + 0.587 G B
* U R=0.147-0.289 G + 0.436 B
* V R=0.615 to 0.515 G - 0.100 B
* the ITU - R BT. 601
* Y? ˉ R=0.257 * '+ 0.504 * G + 0.098 * B' + 16
* Cb 'R=0.148 * 0.291 * G' + 0.439 * B + 128
* Cr 'R=0.439 * 0.368 * G' - 0.071 * B + 128

Could you tell me the color space conversion should after the integer?

According to the needs of storage and application, a common format is need to take the whole

Is rounded forensics, is in the process of compression to integer

CodePudding user response:

reference 4 floor zgl7903 response:

Quote: reference qq_40348659 reply: 3/f

Quote: refer to the second floor lark studio response:

YUV and YCbCr conversion formula is not the same,

* Analog
R * Y=0.299 + 0.114 + 0.587 G B
* U R=0.147-0.289 G + 0.436 B
* V R=0.615 to 0.515 G - 0.100 B
* the ITU - R BT. 601
* Y? ˉ R=0.257 * '+ 0.504 * G + 0.098 * B' + 16
* Cb 'R=0.148 * 0.291 * G' + 0.439 * B + 128
* Cr 'R=0.439 * 0.368 * G' - 0.071 * B + 128

Could you tell me the color space conversion should after the integer?

According to the needs of storage and application, a common format is need to take the whole

JPEG compression