Imaging System Performance Measurement
First Claim
1. A method of measuring performance parameters of an imaging device, said method comprising the steps of:
- maintaining a test pattern image, said test pattern image comprising alignment features and image analysis features;
imaging a test chart using said imaging device to form a second image, said test chart containing a representation of said test pattern image;
registering said test pattern image and said second image using region based matching operating on said alignment features; and
measuring said performance parameters by analysing said image analysis features.
1 Assignment
0 Petitions
Accused Products
Abstract
A method (1000) of measuring performance parameters of an imaging device (120, 160) is disclosed. The method (1000) maintains a test pattern image (1005), the test pattern image (1005) comprising alignment features and image analysis features. A test chart (110, 170) containing a representation of the test pattern image is next imaged using the imaging device (120, 160) to form a second image (1010). The test pattern image (1005) and the second image (1010) are then registered using region based matching (1035) operating on the alignment features. Finally, the performance parameters are measured by analysing (1060) the image analysis features.
252 Citations
28 Claims
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1. A method of measuring performance parameters of an imaging device, said method comprising the steps of:
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maintaining a test pattern image, said test pattern image comprising alignment features and image analysis features;
imaging a test chart using said imaging device to form a second image, said test chart containing a representation of said test pattern image;
registering said test pattern image and said second image using region based matching operating on said alignment features; and
measuring said performance parameters by analysing said image analysis features. - View Dependent Claims (2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 19)
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3. A method of measuring performance parameters of a printer, said method comprising the steps of:
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maintaining a test pattern image, said test pattern image comprising alignment features and image analysis features;
printing said test pattern image using said printer to form a test chart;
imaging said test chart using a calibrated imaging device to form a second image;
registering said test pattern image and said second image using region based matching operating on said alignment features; and
measuring said performance parameters by analysing said image analysis features.
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18. A method of analysing images, said method comprising the steps of:
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receiving first and second images, said second image being a distorted version of said first image;
labeling pixels of said first image with pixel labels;
determining distortion parameters for aligning said first image with said second image;
warping at least said pixel labels using said distortion parameters; and
associating said pixel labels with corresponding pixels in said second image, wherein said labels provide information on a state of pixels in said second image before distortion.
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20. Apparatus for measuring performance parameters of an imaging device, said apparatus comprising:
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means for maintaining a test pattern image, said test pattern image comprising alignment features and image analysis features;
means for receiving a second image, said second image being an image captured by said imaging device of a test chart, and said test chart containing a representation of said test pattern image;
means for registering said test pattern image and said second image using region based matching operating on said alignment features; and
means for measuring said performance parameters by analysing said image analysis features. - View Dependent Claims (22)
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21. Apparatus for measuring performance parameters of a printer, said apparatus comprising:
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means for maintaining a test pattern image, said test pattern image comprising alignment features and image analysis features;
said printer for printing said test pattern image to form a test chart;
a calibrated imaging device for imaging said test chart to form a second image;
means for registering said test pattern image and said second image using region based matching operating on said alignment features; and
means for measuring said performance parameters by analysing said image analysis features.
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23. Apparatus for analysing images, said apparatus comprising:
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means for receiving first and second images, said second image being a distorted version of said first image;
means for labeling pixels of said first image with pixel labels;
means for determining distortion parameters for aligning said first image with said second image;
means for warping at least said pixel labels using said distortion parameters; and
means for associating said pixel labels with corresponding pixels in said second image, wherein said labels provide information on a state of pixels in said second image before distortion.
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24. A computer readable medium storing a computer program for measuring performance parameters of an imaging device, said computer program when executed on a computing device performs the steps of:
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maintaining a test pattern image, said test pattern image comprising alignment features and image analysis features;
imaging a test chart using said imaging device to form a second image, said test chart containing a representation of said test pattern image;
registering said test pattern image and said second image using region based matching operating on said alignment features; and
measuring said performance parameters by analysing said image analysis features. - View Dependent Claims (26)
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25. A computer readable medium storing a computer program for measuring performance parameters of a printer, said computer program when executed on a computing device performs the steps of:
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maintaining a test pattern image, said test pattern image comprising alignment features and image analysis features;
printing said test pattern image using said printer to form a test chart;
imaging said test chart using a calibrated imaging device to form a second image;
registering said test pattern image and said second image using region based matching operating on said alignment features; and
measuring said performance parameters by analysing said image analysis features.
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27. A computer readable medium storing a computer program for analysing images, said computer program when executed on a computing device performs the steps of:
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receiving first and second images, said second image being a distorted version of said first image;
labeling pixels of said first image with pixel labels;
determining distortion parameters for aligning said first image with said second image;
warping at least said pixel labels using said distortion parameters; and
associating said pixel labels with corresponding pixels in said second image, wherein said labels provide information on a state of pixels in said second image before distortion.
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28-33. -33. (canceled)
Specification