Apparatus and method for pre-processing image having element of interest

At least some embodiments of the present disclosure relate to a method for processing an input image having embedded elements, the method comprising the steps of: calculating one or more histograms of the input image; identifying a range of interest in one of the one or more histograms; and determining, by the processor, a threshold based on the range of interest. In some embodiments, the computing device processes the input image using the threshold to generate an output image. 本公开的至少一些实施方案涉及一种用于处理具有嵌入式元素的输入图像的方法，该方法包括以下步骤：计算该输入图像的一个或多个柱状图；识别该一个或多个柱状图中的一个柱状图中的关注的范围；以及基于该关注的范围，由该处理器来确定阈值。在一些实施方案中，计算设备使用该阈值来处理该输入图像以生成输出图像。