TWI408343B - Method for estimating related information corresponding to an object and image capturing device thereof - Google Patents

Abstract

A method includes providing a standard distance value, a standard object, a first image of the standard object which keeps the standard distance from an image capturing device, and a real size of the standard object; the image capturing device capturing a second image; marking a determined object within the second image; inputting an estimated value corresponding to the determined object, and the image capturing device calculating a related value corresponding to the determined object according to the first image and the real size of the standard object, the second image of the determined object, the standard distance, and the estimated value.

Description

Method for estimating information related to an object to be tested and related camera device

The present invention relates to an estimation method and related camera device, and more particularly to a method for estimating information related to an object to be tested and related camera devices.

With the booming of the information industry, it also applies information-related products to daily life or work, replacing traditional analog products and leading users into the digital world. For example, digital cameras are quite representative. For example, in the conventional optical camera, the photographic characteristics of the chemical on the film are used to record the image, and then the image is presented to the user through complicated processes such as development. Furthermore, if the user wants to take a photo with special effects, he or she must carefully control the aperture, shutter, special filter or image processing technique, which is quite inconvenient for users who are not good at camera operation. Unlike traditional optical cameras, digital cameras record image information in a digital manner. Digital cameras use optical sensors to convert images into digital signals and store them in a memory device in a computer image format. It can be connected to a computer system and store images on a hard disk. It can also display images on the monitor and output image content from the printer, so you can immediately see the results. In addition, the user can use the image processing tool to further process the image recorded by the digital camera, and can also make the special effects that the traditional optical camera can take, and even the effect that the conventional camera cannot handle, but the current digital The function of the camera is limited to the above image processing, that is, when the user uses the digital camera to shoot images, the user can only perform special effect image editing or modification on the digital photos captured by the digital camera, but However, it is impossible to obtain further relevant information from the digital photos that it has taken, such as the size or relative distance of the objects in the photos.

The present invention provides a method for estimating information related to an object to be tested, comprising: providing a standard distance, a standard object, a first image corresponding to the standard object at a standard distance from a camera device, and The actual size of the standard object; the camera captures a second image; calibrates an object to be tested in the second image; inputs an estimated value corresponding to one of the objects to be tested; and the camera device according to the corresponding standard The first image of the object and the actual size, the second image of the object to be tested, the standard distance, and the estimated value calculate a correlation value corresponding to one of the objects to be tested.

The invention further provides an image capturing device capable of predicting information about an object to be tested, which comprises a storage unit for recording a first image of a standard object, a standard distance, and an actual size of one of the standard objects; An image capture unit is coupled to the storage unit, the image capture unit is configured to capture a second image and store the second image to the storage unit; a user interface is used for the image capture unit Aligning an object to be tested and inputting an estimated value corresponding to the object to be tested; and calculating a unit connected to the storage unit and the user interface, wherein the calculating unit is used according to the standard object The first image and the actual size, the second image of the object to be tested, the standard distance, and the estimated value calculate a correlation value corresponding to one of the objects to be tested.

Please refer to FIG. 1. FIG. 1 is a functional block diagram of a camera device 10 according to the present invention. The camera device 10 can be a digital camera. The camera device 10 includes a storage unit 12, an image capturing unit 14, a user interface 16, and a computing unit 18. The storage unit 12 is used to record a first image of a standard object, a standard distance, and an actual size of one of the standard objects. The image capturing unit 14 is connected to the storage unit 12, and the image capturing unit 14 is configured to capture the first image corresponding to the standard object from the standard object and capture a second image and store the first image. The second image is to the storage unit 12. The user interface 16 is configured to calibrate an object to be tested in the second image and input an estimated value corresponding to one of the objects to be tested. The computing unit 18 is electrically connected to the storage unit 12 and the user interface 16, and the computing unit 18 is configured to use the first image of the standard object and the actual size, the second image of the object to be tested, and the standard distance. And the estimated value is calculated as a value corresponding to one of the objects to be tested, and the calculating unit 18 is a computing software built into the camera device 10.

Referring to FIG. 2, FIG. 2 is a flow chart of a method for estimating the height of an object to be tested according to a first embodiment of the present invention, the method comprising the following steps.

Step 200: providing the standard distance, the standard object, the first image corresponding to the standard distance from the camera device 10, and the standard image of the standard object; and the standard height of the standard object;

Step 202: The image capturing unit 14 of the camera device 10 captures the second image;

Step 204: calibrate the object to be tested in the second image through the user interface 16 of the camera device 10;

Step 206: Input an estimated distance of the object to be tested relative to the camera device 10 through the user interface 16 of the camera device 10;

Step 208: The computing unit 18 of the camera device 10 compares a first height of the standard object in the first image with a second height of the object to be tested in the second image to generate the second height. The first multiple of one of the first heights;

Step 210: The computing unit 18 of the camera device 10 compares the standard distance with the estimated distance to generate the estimated distance by a second multiple of the standard distance;

Step 212: The calculating unit 18 of the camera device 10 calculates an estimated actual height of the object to be tested according to the standard height of the standard object, the first multiple, and the second multiple.

The steps shown in Fig. 2 will be described in detail below. First, the standard distance mentioned in step 200, the standard object, the first distance corresponding to the standard distance from the camera device 10, and the standard image of the standard object may be the camera device. The internal setting value pre-stored by the storage unit 12 of the 10 means that the image data is preset to be stored in the storage unit 12 when the camera device 10 is shipped, that is, the above numerical values and objects can be first before the camera device 10 is shipped. The correction and the setting of the standard value have been made. For example, before the camera device 10 is shipped from the factory, it is possible to select an object having an actual height of 10 cm as the standard object, and then take 1 meter for the standard distance. In the setting, the image capturing unit 14 of the imaging device 10 captures the first image of the standard object corresponding to the standard distance from the imaging device 10, so that the standard object can be obtained in the first image. a height, by which a subsequent comparison and a step of estimating the height of the object to be tested are performed, and in addition, the above values and objects can also be established by the user's own setting. In the unit 12, the user selects the standard object and the standard distance, so that the image capturing unit 14 of the camera device 10 can automatically capture the first standard corresponding to the standard distance of the camera device 10. The setting procedure of the image is similar to the above process, so it will not be described here. Then, after the user captures the second image corresponding to the object to be tested and stores the second image to the storage unit 12 by using the image capturing unit 14 of the camera device 10 (step 202), the user can use the camera. The user interface 16 of the device 10 calibrates the object to be tested in the second image (step 204). For example, if the user wants to use the camera device 10 to estimate the height of the object to be tested, the user is The height of the object to be tested (ie, the second height) is determined by clicking the corresponding two-point position on the second image through the user interface 16. Then, the user interface 16 is used to input the Measuring the estimated distance of the object relative to the camera device 10 (step 206), such that the computing unit 18 of the camera device 10 begins to compare the first height in the first image of the standard object with the to-be-tested The second height of the object in the second image to generate the first multiple of the second height relative to the first height (step 208), and comparing the standard distance to the estimated distance to generate the estimated distance Relative to the standard distance a multiple (step 210). Finally, the calculating unit 18 of the camera device 10 can calculate an estimated actual height of the object to be tested according to the standard height of the standard object, the first multiple, and the second multiple. Here, the calculation unit 18 calculates the estimated actual height of the object to be tested according to the following formula (1) (step 212).

H ₂ =H ₁ ×M ₁ ×M ₂ Formula (1) wherein H ₂ is the estimated actual height of the object to be tested, H _{1 is} the standard height, M _{1 is} the first multiple, and M _{2 is} the first Doubled.

The calculation principle of the above formula (1) is explained as follows. Referring to FIG. 3, FIG. 3 is a schematic diagram showing the geometric relationship between the image length and the capturing distance of the object to be detected by the imaging device 10 of FIG. 1. As can be seen from FIG. 3, when the distance between the imaging device 10 and the measured object is At 1 meter, the image length of the measured object is y, and when the distance between the camera 10 and the measured object is increased to 2 meters, the image length of the measured object is reduced to 1/2*y, when the camera When the distance between the objects to be measured is increased to 3 meters, the image length of the object to be measured is reduced to 1/3*y. Therefore, it is inferred from the above that the image captured by the image pickup device 10 is 3 meters. If the length of the image captured by the imaging device 10 is equal to 1 meter, the actual length of the measured object that is 3 meters away from the imaging device 10 is 1 meter away from the imaging device 10. The actual length of the measured object is 3 times.

Therefore, assuming that the first multiple is equal to 2 (indicating that the estimated actual height of the object to be tested is twice the standard height of the standard object under the same extraction distance), and the second multiple is equal to 10 (representing the estimated distance is 10 times the standard distance), the estimated actual height of the object to be tested is the product of the standard height multiplied by the first multiple and then multiplied by the second multiple. That is, if the standard height is equal to 10 cm, the calculation unit 18 compares the first height in the first image of the corresponding standard object and the second height of the object to be tested in the second image. The first multiple is equal to 2, and the user inputs 10 meters (the estimated distance) through the user interface 16 and the standard distance is equal to 1 meter, that is, the second multiple is equal to 10, then the calculation unit The estimated actual height of the object to be tested calculated by 18 is equal to 200 cm (10 cm * 2 * 10). In summary, with the camera device 10 provided by the present invention, when the user wants to know the height of an object in the photo taken by the camera device 10, the user only needs to use the user interface 16 to image the corresponding object. The midpoint selects the corresponding two-point position to calibrate the height of the object and input the estimated distance between the object and the camera device 10, and the calculating unit 18 can calculate the estimated actuality of the object using the above formula (1). height. In addition, the above calculation process can also be used to calculate other size-related values of the object, such as width.

Referring to FIG. 4, FIG. 4 is a flow chart of a method for estimating the distance of an object to be tested from the camera device 10 according to a second embodiment of the present invention, the method comprising the following steps.

Step 400: providing the standard distance, the standard object, and the camera device 10 The first image of the standard object and the standard height of the standard object are opposite to the standard distance; step 402: the image capturing unit 14 of the camera device 10 captures the second image; and step 404: the image capturing device 10 is transmitted. The user interface 16 calibrates the object to be tested in the second image; Step 406: Input the actual height of one of the objects to be tested through the user interface 16 of the camera device 10; Step 408: Calculate the unit 18 of the camera device 10 a first height of the standard object in the first image and a second height of the object to be tested in the second image to generate the second height as a multiple of the first height; Step 410: Camera The calculating unit 18 of the device 10 calculates the object to be tested relative to the imaging device 10 according to the standard height of the standard object, the standard distance, the multiple of the second height relative to the first height, and the actual height of the object to be tested. One of the estimated distances.

The following is a detailed description of the steps shown in FIG. First, the standard distance mentioned in step 400, the standard object, the first image corresponding to the standard distance from the camera device 10, and the standard image of the standard object, and the standard height of the standard object may be compared with step 200. Similarly, that is, it may be an internal setting value pre-stored by the storage unit 12 of the camera device 10 or set by the user. Then, after the user captures the second image by using the image capturing unit 14 of the camera device 10 and stores the second image in the storage unit 12 (step 402), the user can use the camera. The user interface 16 of the device 10 selects two corresponding positions in the second image to calibrate the second height of the object to be tested in the second image (step 404), and then reuses the user. The interface 16 inputs the actual height of the object to be tested, so that the computing unit 18 of the camera device 10 begins to compare the first height of the standard object in the first image with the object to be tested. The second height in the two images is used to generate the multiple of the second height relative to the first height. Finally, the computing unit 18 of the camera device 10 can be based on the standard height of the standard object, the standard distance, and the second Calculating the estimated distance of the object to be tested relative to the camera device 10 by the multiple of the height relative to the first height and the actual height of the object to be tested, where the calculating unit 18 calculates the method according to the following formula (2) The estimated distance of the object to be tested relative to the imaging device 10.

D ₂ =[H ₃ /(H ₄ ×M)]×D ₁ Formula (2) where D ₂ is the estimated distance of the object to be tested relative to the imaging device 10, and H ₃ is the actual height of the object to be tested , H ₄ is the standard height of the standard object, M is the multiple of the second height relative to the first height, and D _{1 is} the standard distance.

The above formula (2) is derived from the formula (1), so the calculation principle thereof will not be described in detail herein. Therefore, assuming that the actual height of the object to be tested is equal to 200 cm, the standard height of the standard object is equal to 10 cm, the multiple is equal to 2, and the standard distance is equal to 1 meter, the object to be tested is opposite to the camera device 10. The estimated distance is equal to the actual height of the object to be tested divided by the product of the standard height of the standard object and the multiple, and then multiplied by the standard distance, that is, the object to be tested calculated by the calculating unit 18 The estimated distance from the camera unit 10 is equal to 10 meters ([200 cm/(10 cm*2)]*1 meter). In summary, with the camera device 10 provided by the present invention, when the user wants to know the relative distance between an object and the camera device 10 in the photo taken by the camera device 10, the user only needs to use the user interface 16 In the second image, the corresponding two-point position is selected to calibrate the height of the object and input the estimated actual height of the corresponding object, and the calculating unit 18 can calculate the estimate of the object using the above formula (2). Actual height.

Compared with the prior art, only digital camera can be used for image capture and editing, and the present invention can utilize the calculation unit built in the camera device according to the factory preset value or the user-defined standard value (the above standard distance) , the standard object, the first image of the standard object corresponding to the standard distance from the camera device, and the actual height of the standard object), plus the estimated value of the corresponding object to be tested input by the user (relative to the pre-camera) Estimating the distance or the estimated actual height of the object to be tested, and then using the calculation formula provided in the embodiment of the present invention to obtain the relevant value of the object to be tested (the estimated actual height of the object to be tested or the object to be tested) In addition to the camera device for capturing and editing digital images, the user can further learn about the images by using a computing unit built in the camera device. Information about any object, such as the size or relative distance of objects within the photo.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

10‧‧‧ camera

12‧‧‧ storage unit

14‧‧‧Image capture unit

16‧‧‧User interface

18‧‧‧Computation unit

Fig. 1 is a functional block diagram of an image pickup apparatus of the present invention.

Fig. 2 is a flow chart showing a method for estimating the height of an object to be tested according to the first embodiment of the present invention.

Fig. 3 is a schematic diagram showing the geometric relationship between the image height of the object to be measured and the capturing distance in the image capturing device of Fig. 1.

Figure 4 is a flow chart of a method for estimating the distance of an object to be tested from an imaging device according to a second embodiment of the present invention.

200 to 212. . . step

Claims (16)

A method for estimating information related to an object to be tested, comprising: providing a standard distance, a standard object, a first image of a standard object corresponding to the standard distance from a camera device, and the standard object An actual size; the camera captures a second image; calibrates an object to be tested in the second image; inputs an estimated value corresponding to one of the objects to be tested; and the camera device according to the corresponding standard object An image and the actual size, the second image of the object to be tested, the standard distance, and the estimated value calculate a correlation value corresponding to one of the objects to be tested. The method of claim 1, wherein the standard distance, the standard object, the first image of the standard object corresponding to the standard distance from the camera device, and the actual size of the standard object are included in the camera The device draws the first image corresponding to the standard object at the standard distance from the standard object. The method of claim 1, wherein the inputting the estimated value corresponding to the object to be tested comprises inputting an estimated distance of the object to be tested relative to the one of the camera devices. The method of claim 3, wherein the camera device calculates a pair according to the first image of the corresponding standard object and the actual size, the second image of the object to be tested, the standard distance, and the estimated value. The relevant value of the object to be tested should contain The camera device has a first height of the standard object in the first image and a second height of the object to be tested in the second image to generate the second height relative to the first height a first multiple; the camera device compares the standard distance with the estimated distance to generate the estimated distance with respect to the second multiple of the standard distance; and according to the standard height of one of the standard objects, the first multiple, and the The second multiple calculates the estimated actual height of one of the objects to be tested. The method of claim 4, wherein calculating the estimated actual height of the object to be tested according to the standard height of the standard object, the first multiple, and the second multiple comprises calculating according to the following relationship The estimated actual height of the object to be tested: H ₂ = H ₁ × M ₁ × M ₂ ; wherein H ₂ is the estimated actual height of the object to be tested, H _{1 is} the standard height, and M _{1 is} the first The multiple, M _{2 is} the second multiple. The method of claim 1, wherein the inputting the estimated value corresponding to the object to be tested includes inputting an actual height of one of the objects to be tested. The method of claim 6, wherein the camera device calculates the pair according to the first image of the corresponding standard object and the actual size, the second image of the object to be tested, the standard distance, and the estimated value. The relevant value of the object to be tested includes: The camera device compares a first height of the standard object in the first image and a second height of the object to be tested in the second image to generate the second height as a multiple of the first height; And calculating, according to a standard height of the standard object, the standard distance, the multiple of the second height relative to the first height, and the actual height of the object to be tested, an estimated distance of the object to be tested relative to the camera device . The method of claim 7, wherein the object to be tested is calculated according to the standard height of the standard object, the standard distance, the multiple of the second height relative to the first height, and the actual height of the object to be tested. The estimated distance from the camera device includes calculating the estimated distance of the object to be tested relative to the camera device according to the following relationship: D ₂ =[H ₃ /(H ₄ ×M)]×D ₁ ; D ₂ is the estimated distance of the object to be tested relative to the camera device, H ₃ is the actual height of the object to be tested, H ₄ is the standard height of the standard object, and M is the second height relative to the first The multiple of the height, D _{1 is} the standard distance. An image capturing device capable of estimating information related to an object to be tested, comprising: a storage unit for recording a first image of a standard object, a standard distance, and an actual size of the standard object; The capture unit is connected to the storage unit, the image capture unit is configured to capture a second image and store the second image to the storage unit; a user interface is used for the second Calibrate an object to be tested and lose in the image Entering an estimated value of one of the objects to be tested; and a computing unit coupled to the storage unit and the user interface, the computing unit is configured to use the first image and the actual size of the standard object, The second image of the object to be tested, the standard distance, and the estimated value calculate a correlation value corresponding to one of the objects to be tested. The camera device of claim 9, wherein the image capturing unit is configured to capture the first image corresponding to the standard object from the standard object by the standard distance. The camera device of claim 9, wherein the user interface is configured to input an estimated distance of the object to be tested relative to the camera device. The camera device of claim 11, wherein the computing unit is configured to compare a first height of the standard object in the first image with a second height of the object to be tested in the second image. Generating a first multiple of the second height relative to the first height, comparing the standard distance to the estimated distance to produce a second multiple of the estimated distance relative to the standard distance, and a standard according to the standard object The height, the first multiple, and the second multiple calculate an estimated actual height of the object to be tested. The camera device of claim 12, wherein the standard height of the standard object, the first multiple, and the relationship between the second multiple and the estimated actual height of the object to be tested are as follows: H ₂ =H ₁ × M ₁ × M ₂ ; wherein H ₂ is the estimated actual height of the object to be tested, H _{1 is} the standard height, M _{1 is} the first multiple, and M _{2 is} the second multiple. The camera device of claim 9, wherein the user interface is used to input an actual height of one of the objects to be tested. The camera device of claim 14, wherein the computing unit is configured to compare a first height of the standard object in the first image with a second height of the object to be tested in the second image Generating a second height relative to the first height and calculating a standard height of the standard object, the standard distance, the multiple of the second height relative to the first height, and the actual height of the object to be tested An estimated distance from the object to be tested relative to the camera device. The camera device of claim 15, wherein the standard height of the standard object, the standard distance, the multiple of the second height relative to the first height, and the actual height of the object to be tested are opposite to the object to be tested. The relationship between the estimated distances of the camera device is as follows: D ₂ =[H ₃ /(H ₄ ×M)]×D ₁ ; wherein D ₂ is the estimated distance of the object to be tested relative to the camera device, H ₃ is the actual height of the object to be tested, H ₄ is the standard height of the standard object, M is the multiple of the second height relative to the first height, and D _{1 is} the standard distance.