A high dynamic range image generation method, device and mobile terminal
A high dynamic range, image generation technology, applied in the field of image processing, can solve the problem of slow processing speed of the generation scheme, achieve the effect of improving dynamic range, taking pictures quickly, and improving processing speed
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Embodiment 1
[0023] figure 1 A schematic flowchart of a method for generating a high dynamic range image provided in Embodiment 1 of the present invention, the method can be executed by a device for generating a high dynamic range image, wherein the device can be implemented by software and / or hardware, and generally can be integrated in a mobile in the terminal. Such as figure 1 As shown, the method includes:
[0024] Step 101. Calculate the brightness weighted average value of the current cached image.
[0025] Wherein, weights of regions whose luminance values are higher than the first luminance threshold are higher than weights of other regions.
[0026] Exemplarily, the mobile terminal in this embodiment may specifically be a terminal such as a mobile phone, a tablet computer, and a digital camera, preferably a smart phone.
[0027] Exemplarily, the current cached image may be divided into multiple regions according to the brightness distribution, and each region may include one...
Embodiment 2
[0037] figure 2 It is a schematic flowchart of a method for generating a high dynamic range image provided by Embodiment 2 of the present invention. This embodiment is optimized on the basis of the above embodiment. The brightness of the area at the second brightness threshold, and generate an HDR image" is optimized as follows: calculate the gamma parameter according to the brightness statistical data of the image to be processed; adjust the image to be processed according to the gamma parameter to improve the low brightness value in the image to be processed Obtain a sample image based on the brightness of the area of the second brightness threshold; generate an HDR image according to the sample image.
[0038] Correspondingly, the method of this embodiment includes the following steps:
[0039] Step 201. Calculate the brightness weighted average value of the current cached image.
[0040] Wherein, weights of regions whose luminance values are higher than the first lu...
Embodiment 3
[0053] image 3 It is a schematic flowchart of a preferred high dynamic range image generation method provided by Embodiment 3 of the present invention, and the method is especially suitable for the zero second delay (Zero Second Delay, ZSD; also known as Zero Second Later, ZSL) photographing mode. Such as image 3 As shown, the method includes the following steps:
[0054] Step 301. Calculate the weighted average value of brightness of the current cached image.
[0055] Wherein, weights of regions whose luminance values are higher than the first luminance threshold are higher than weights of other regions.
[0056] Exemplarily, the ZSD camera mode can be understood as what you take is what you get. The photo taken at the moment the user presses the camera button is the photo the user sees in the preview interface, which is relative to the normal mode of taking pictures. To take a picture in normal mode, after pressing the camera button, a series of processing and correct...
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