Image processing device and image processing method
An image processing device and image technology, applied in image data processing, image data processing, image analysis and other directions, can solve problems such as unknown distance information of all-focus images
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Embodiment approach 1
[0022] Below, use figure 1 Embodiment 1 will be described.
[0023] figure 1 It is a block diagram showing the functional configuration of the image processing device in the first embodiment.
[0024] The image processing device 100 in this embodiment is a device that calculates distance information to a subject using a plurality of images with different focus positions. Such as figure 1 As shown, the image processing device 100 includes a frequency conversion unit 110 , an amplitude extraction unit 120 , and a distance information calculation unit 130 .
[0025] The frequency conversion unit 110 is a processing unit that converts an image into a frequency. That is, the frequency conversion unit 110 converts the images from the image space to the frequency space for a plurality of images having different focus positions. By transforming the image from the image space to the frequency space, the accuracy of distance information calculation can be improved. In the case of ...
Embodiment approach 2
[0050] Below, use Figure 4 Embodiment 2 will be described.
[0051] Figure 4 It is a block diagram showing the functional configuration of the image processing device in the second embodiment. In addition, in this embodiment, the same code|symbol is used for the same structure as Embodiment 1, and description is abbreviate|omitted.
[0052] In this embodiment, in order to further improve the accuracy of distance information calculation, the distance information is calculated after correcting the positional offset between different images.
[0053] The image processing device 100 in this embodiment further includes a region division unit 140 and a region search unit 150 . The area dividing unit 140 is a processing unit that divides the first image into a plurality of first small areas. The size of the first small area to be divided is not particularly limited, for example, it may be divided into a first small area of 4 pixels×4 pixels.
[0054] The area search unit 150...
Embodiment approach 3
[0060] Below, use Figure 5 Embodiment 3 will be described.
[0061] Figure 5 It is a block diagram showing the functional configuration of the distance information calculation unit in this embodiment.
[0062] Such as Figure 5 As shown, the distance information calculation unit 130 includes a representative cost calculation unit 133 instead of the cost calculation unit 131 , and includes a representative distance determination unit 134 instead of the distance determination unit 132 .
[0063] The representative cost calculation unit 133 calculates the representative cost of the assumed distance for each small region by using the amplitude component of the first small region of the first image, the amplitude component of the second small region of the second image, and the input blur data of the lens. cost. That is, the representative cost calculation unit 133 calculates the representative cost of the assumed distance for each first small area aligned with the correspond...
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