Contraction of digital image circuit with adjustable proportion and accuracy
A digital image and high-precision technology, which is applied in the field of realizing digital image scaling circuits, can solve problems such as difficult hardware implementation and complex digital image logic, and achieve the effect of good continuous scaling effect, high data accuracy, and easy realization
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[0013] A method for realizing a digital image zooming circuit for adjusting ratio and precision of the present invention is a two-dimensional transformation. Such as figure 1 As shown, it includes the following steps, first perform horizontal transformation, then perform line data caching and accumulation, and finally perform vertical transformation;
[0014] The horizontal direction transformation can realize the scaling transformation of the three channels in the horizontal direction. According to the image transmission format in the usual chip, its input includes: frame synchronization (Vsync), row synchronization (Href), row conversion ratio (Hratio[7:0]), output image width (CropWidth[11:0]), input Image width (InWidth[11:0]), starting transform position (CropX[8:0]), and input data for one channel (InData[7:0]). Such as figure 2 As shown, when zooming in the horizontal direction, the state machine is first in the no-point state. When the input is valid (valid refers...
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