Method for image recombination of a plurality of images and image identification and system for image acquiring and identification

• US 9,286,533 B2
• Filed: 12/05/2014
• Issued: 03/15/2016
• Est. Priority Date: 04/30/2009
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Tsai, Ya-Hui, Huang, Kuo-Tang, Chang, Chun-Lung, Chen, Lai-Sheng
• Primary Examiner(s): TSAI, TSUNG YIN
• Application Number:
  US14/561,604
• Publication Number:
  US 20150086135A1
• Time in Patent Office: 466 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G06T 11/60 Editing figures and text; Combining figures or text
• CPC Class Codes: G06V 20/62 Text, e.g. of license plates, overlay texts or captions on TV images
• CPC Class Codes: G06V 20/625 License plates
• CPC Class Codes: G06V 20/63 Scene text, e.g. street names
• CPC Class Codes: G06V 30/10 Character recognition
• CPC Class Codes: G06V 30/262 using context analysis, e.g. lexical, syntactic or semantic context

Abstract

The present invention provides a method for image recombination of a plurality of images and image identification and a system for image acquiring and identification. Features with respect to the plurality of images are recombined and enhanced so as to form a recombined image. After that, the recombined image is processed to emphasize the features of the recombined image so that the recombined image is capable of being identified easily. Furthermore, the present provides a system to perform the foregoing method, whereby reducing unidentified problems caused due to low quality image of the monitoring system.

Claims

1. A method for image identification, comprising steps of:

acquiring a plurality of images;

determining a region of interest in an image from the plurality of images and acquiring features in the region of interest;

acquiring from other regions, a feature region corresponding to the region of interest according to the acquired features; and

performing an image recombination process to form a recombined image according to a plurality of feature regions and the region of interest; and

identifying the recombined image by;

acquiring at least one feature image in the recombined image, each pixel of the feature image having a third feature value;

providing a database comprising a plurality of sample images therein, each having respectively a standard image region and at least a non-standard image region such that the standard image region has pixels corresponding to a first feature value respectively, and the non-standard image region has pixels corresponding to a second feature value respectively;

performing a calculation on the third feature values and the first feature values and the second feature values corresponding to the pixels in the plurality of sample images to obtain similarity indexes of the feature image corresponding to the plurality of sample images respectively;

collecting the similarity indexes with respect to the feature image compared with the plurality of sample images;

sorting the similarity indexes; and

outputting at least one of comparison results which correspond to the sorted similarity indexes,

wherein the first feature values each include a combination of a positive weight value and a greyscale value,

wherein the second feature values each include a combination of a negative weight value and a greyscale value,

wherein the third feature values are each a greyscale value.

2. The method for image identification as recited in claim 1, wherein the calculation is based on normalized correlation matching.

3. The method for image identification as recited in claim 1, wherein each sample image corresponds to an image of a digit or a character.

4. The method for image identification as recited in claim 1, wherein each weight value is determined according to a user'"'"'s demand.

5. The method for image identification as recited in claim 1, wherein for each respective one of the sample images, a corresponding one of the similarity indexes of the respective one sample image compared with the features image

is determined by the formula

6. The method for image identification as recited in claim 1, wherein for each respective one of the sample images, a corresponding one of the similarity indexes of the respective one sample image compared with the feature image, is based upon each of

the greyscale values of the first and second feature values of the respective one sample image,

the greyscale values of the third feature values,

an average greyscale value of all the pixels in the respective one sample image,

an average greyscale value of all the pixels in the feature image, and

the weight values of the pixels in the standard image region and the non-standard image region in the respective one sample image.

7. A system for image acquiring and identification, comprising:

an image input unit capable of providing a plurality of images;

an image processing unit coupled to the image input unit, the image processing unit further comprising;

a feature acquiring unit capable of acquiring features in a region of interest on an image from the plurality of images and acquiring from other regions a plurality of feature regions corresponding to the region of interest according to the acquired features;

a recombination unit capable of performing an image recombination process according to the plurality of feature regions and the region of interest to form a recombined image,

the image processing unit including;

a database comprising a plurality of sample images therein, each having respectively a standard image region and at least a non-standard image region so that the standard image region has pixels corresponding to a first feature value respectively, and the non-standard image region has pixels corresponding to a second feature value respectively; and

an identification and comparison unit coupled to the recombination unit to identify the recombined image, the identification and comparison unit performing a calculation on a third feature value of each pixel in a feature image in the recombined image, and the first feature value and the second feature value corresponding to the pixels in the plurality of sample images to obtain similarity indexes of the feature image corresponding to the plurality of sample images respectively, the identification and comparison unit further collecting the similarity indexes with respect to the feature image compared with the plurality of sample images,

wherein the first feature values each include a combination of a positive weight value and a greyscale value,

wherein the second feature values each include a combination of a negative weight value and a greyscale value,

wherein the third feature values are each a greyscale value.

8. The system for image acquiring and identification as recited in claim 7, wherein the image processing unit is further connected to an output unit to sort the similarity indexes and output at least one comparison result which corresponds to one of the similarity indexes.

9. The system for image acquiring and identification as recited in claim 7, wherein each weight value is determined according to a user'"'"'s demand.

10. The system for image acquiring and identification as recited in claim 7, wherein for each respective one of the sample images, a corresponding one of the similarity indexes of the respective one sample image compared with the features image

is determined by the formula

11. The system for image acquiring and identification as recited in claim 7, wherein for each respective one of the sample images, a corresponding one of the similarity indexes of the respective one sample image compared with the feature image, is based upon each of

the greyscale values of the first and second feature values of the respective one sample image,

the greyscale values of the third feature values,

an average greyscale value of all the pixels in the respective one sample image,

an average greyscale value of all the pixels in the feature image, and

the weight values of the pixels in the standard image region and the non-standard image region in the respective one sample image.