Image scanning device

Image scanning device

IMAGE SCANNING DEVICE

The present disclosure relates to an image scanning device, and more particularly to an image scanning device capable of capturing complete image information.

In the current fingerprint recognition solution for electronic devices, the under-screen fingerprint recognition technology in which the user directly touches the screen to perform fingerprint recognition has gradually become the mainstream. If the area of the fingerprint recognition sensor under the screen is increased, the technical effect of fingerprint recognition in multiple positions on the screen can be achieved. However, the existing electronic devices do not use the under-screen fingerprint recognition sensor for applications other than fingerprint recognition, which wastes the image capturing function of the under-screen fingerprint recognition sensor. Therefore, how to use the fingerprint recognition sensor under the screen to perform applications other than fingerprint recognition is a goal for those skilled in the art.

In view of this, the present disclosure provides an image scanning device capable of capturing complete image information.

The present disclosure proposes an image scanning device, including: a display, when an object contacts the display, the display emits red light, green light, and blue light to expose the object; a sensor is arranged below the display, so The sensor obtains a first image corresponding to the red light, a second image corresponding to the green light, and a third image corresponding to the blue light; and a processing module, coupled to the sensor and the In a display, the processing module generates an object image corresponding to the object according to the first image, the second image, and the third image.

Based on the above, the image scanning device of the present disclosure has the sensor disposed under the display. When an object touches the display, the display emits red, green, and blue light to expose the object, and the sensor obtains the first image, the second image, and the third image. Three images produce object images. Since the object directly touches the display and the light source is emitted from the display, the generated object image will not be interfered by the external light source, nor will the edge of the lens be distorted.

1A and 1B are schematic diagrams of an image scanning device according to an embodiment of the disclosure.

1A and 1B, the image scanning device 100 of an embodiment of the disclosure includes a display 110, a sensor 120, and a processing module 130. The sensor 120 is disposed under the display 110. The processing module 130 is coupled to the display 110 and the sensor 120. The display 110 is, for example, an Organic Light Emitting Diode (OLED) display or other similar elements. In one embodiment, the display 110 may integrate touch sensing elements therein. The sensor 120 is, for example, a Thin Film Transistor (TFT) sensor or other similar elements. The processing module 130 is, for example, a central processing unit (CPU), an application processor (AP), or other programmable general-purpose or special-purpose microprocessors (Microprocessor), digital signal processing (Digital Signal Processor, DSP), programmable controller, special application integrated circuit (Application Specific Integrated Circuits, ASIC), programmable logic device (Programmable Logic) Device, PLD) or a combination of these components.

In one embodiment, when the object to be measured (for example, an object such as a business card) contacts the display 110 (for example, the object to be measured is placed on the display 110), the processing module 130 may instruct the display 110 to emit red light, green light, and The blue light exposes the object and the sensor 120 obtains a first image corresponding to red light, a second image corresponding to green light, and a third image corresponding to blue light. The processing module 130 generates an object image corresponding to the object according to the first image, the second image, and the third image. Since the sensor 120 has a large sensing area, the object image generated by the processing module 130 is a one-to-one color scan image of the corresponding object and the object image can present complete data of the object.

Since the sensor 120 is disposed under the display 110, the first image, the second image, and the third image obtained by the sensor 120 include component images such as wires and fences between the upper part of the sensor 120 and the display 110 . The processing module 130 first performs a backing operation on the first image, the second image, and the third image (ie, subtracts the background in the image), and then generates objects based on the first image, the second image, and the third image after the background is subtracted image. For example, the processing module 130 can determine the element image pixels and the non-element image pixels in the first image (or the second image, the third image). For each element image pixel, the processing module 130 can obtain the non-element image pixels around the element image pixel to calculate the pixel value by interpolation, and replace the element image pixel with the calculated result to complete the backing operation.

In one embodiment, the processing module 130 calculates the red-green-blue mixing ratio according to the first image, the second image, and the third image after subtracting the background, and according to the red-green-blue mixing ratio and the first image and the second image after subtracting the background The second image and the third image generate object images. For example, the processing module 130 may calculate the red channel grayscale value of each pixel in the first image after subtracting the background, the green channel grayscale value of each pixel in the second image, and the grayscale value of each pixel in the third image. The blue channel grayscale value, and the red channel grayscale value, the green channel grayscale value and the blue channel grayscale value of each pixel are mixed to restore the color of the object to generate a color image of the object.

In one embodiment, if the area of the object is greater than the area of the sensor 120, the processing module 130 obtains multiple stitched images of the object, and matches multiple feature points of the object in the multiple stitched images to combine the multiple stitched images Stitched into object images. Each spliced image can be obtained by the display 110 respectively emitting red light, green light and blue light for three exposures and subtracting the background before performing color restoration. Specifically, when the area of the object is greater than the area of the sensor 120, the user can perform a sliding operation of the object on the sensor 120 to obtain multiple mosaic images of the object. The processing module 130 can identify one or more feature points on each stitched image, and match the common feature points of any two or more stitched images to perform image stitching, and then stitch the multiple stitched images into a complete object image .

FIG. 2 is a flowchart of an image scanning method according to an embodiment of the disclosure.

Referring to FIG. 2, in step S201, when an object contacts the display, the display emits red light, green light, and blue light to expose the object.

In step S202, a first image corresponding to red light, a second image corresponding to green light, and a third image corresponding to blue light are obtained by the sensor.

In step S203, an object image corresponding to the object is generated according to the first image, the second image, and the third image.

In summary, the image scanning device of the present disclosure has the sensor disposed under the display. When an object touches the display, the display emits red light, green light, and blue light to expose the object, and the sensor obtains the first image, the second image, and the third image. Three images produce object images. Since the object directly touches the display and the light source is emitted by the display, the generated object image will not be interfered by the external light source and will not cause the phenomenon of distortion of the edge of the lens.

Although the present disclosure has been disclosed in the above embodiments, it is not intended to limit the present disclosure. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of this disclosure. Therefore, The scope of protection of this disclosure shall be subject to the scope of the attached patent application.

<p>100: Image scanning device &lt;br /&gt;110: display &lt;br /&gt;120: Sensor &lt;br /&gt;130: Processing module &lt;br /&gt;S201~S204: Steps of image scanning method </p>

1A and 1B are schematic diagrams of an image scanning device according to an embodiment of the disclosure. &lt;br /&gt;FIG. 2 is a flowchart of an image scanning method according to an embodiment of the disclosure.