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Histogram size

Hi there! I'm trying to make a histogram of a picture preview from the camera of an android in Portrait mode 1080x1440. The problem is that where i want to show the histogram is ImageView with size 1080x115. The result histogram now is 1080x1440 and if i scale it to fit 1080x115, the lower part of the hist is barely observed. How can i make the proper histogram preview to my desired size?