Several Methods Of Converting Color Image TO monochrome

1、 Four different conversion methods    Several Methods Of Converting Color Image TO monochrome

      The quickest way to turn a color image into a monochrome image is to use the gray mode option, that is, select “image / mode / gray”. However, the biggest disadvantage of this operation is that all color information is removed in the conversion process, Several Methods Of Converting Color Image TO monochrome   

      And the conversion results will vary according to different images,Several Methods Of Converting Color Image TO monochrome

        In other words, the same amount of conversion and condition consistency in the process of color conversion cannot be guaranteed. Therefore, if you want to get good color conversion, try not to take this method.Several Methods Of Converting Color Image TO monochrome

         Saturation method, or more precisely, dilute the color, that is, select “image, adjustment, hue / saturation”, as shown in Figure 2, move the moving slider of saturation from 0 to – 100, Several Methods Of Converting Color Image TO monochrome

      And then click “OK”. As a result,Several Methods Of Converting Color Image TO monochrome

       The image obtained is very similar to that obtained using a monochrome negative without a color filter. Several Methods Of Converting Color Image TO monochrome

       At this time, the image tends to be smoother, which is equivalent to obtaining a completely different original color image with the same gray dark light (as shown in Figure 3). Several Methods Of Converting Color Image TO monochrome

      However, this method is not the best, so it is not recommended.Several Methods Of Converting Color Image TO monochrome

        This method is considered to be the most perfect so far, that is, using Lab color for transformation. First select “image / mode / Lab color”; Then select mode / grayscale, and the color image will become a monochrome image.Several Methods Of Converting Color Image TO monochrome

       In the channel palette, color information is contained in channel A and channel B. Several Methods Of Converting Color Image TO monochrome

      The lightness value is in the lightness channel (as shown in Figure 4). Several Methods Of Converting Color Image TO monochrome

        The highlight and image of the brightness channel appear in the form of monochrome. This step is the biggest improvement over the above two steps, which is that it uses the lab color space,Several Methods Of Converting Color Image TO monochrome

       which has the largest color gamut, Several Methods Of Converting Color Image TO monochrome

       uses a large color space to match a small color gamut, and the lab color space is a color expression independent of the device, so it does not need to consider the changes caused by display conditions Change. Several Methods Of Converting Color Image TO monochrome

       However, although this method is popular with most photographers,Several Methods Of Converting Color Image TO monochrome

        I personally think this method of color conversion is not the most appropriate.Several Methods Of Converting Color Image TO monochrome. Here is a new method to convert color images into monochrome images.Several Methods Of Converting Color Image TO monochrome

2. Mixed channel conversion method. Select “mode / adjust / blend channel”, Several Methods Of Converting Color Image TO monochrome

       As shown in Figure 5, and select monochrome in the dialog box.Several Methods Of Converting Color Image TO monochrome.The default values for this channel are + 100% red, 0% green and 0% blue. Several Methods Of Converting Color Image TO monochrome

       Adjust the 3 sliders to change the monochrome value of the image. In the mediation process, sometimes 100% red is the best choice. Several Methods Of Converting Color Image TO monochrome

        However, as a common basic initial point setting, the channel will be set to: 60% red, 40% green and 0% blue. Adjust the 3 channels until you are satisfied with the color of the image, Several Methods Of Converting Color Image TO monochrome

     Pay attention to the reasonable selection of the bottom support of the printing plate. For the relief printing press with circular flattening structure. 

       The characteristics of the plate base material have a great impact on the printing pressure, overprint accuracy and ink quality.Several Methods Of Converting Color Image TO monochrome

       The traditional wooden bottom support is not solid, with poor squareness, flatness and stability. It is easy to bow and deform, and the printing quality is difficult to guarantee. Several Methods Of Converting Color Image TO monochrome

        Therefore, relief printing should use solid, flat, square and stable aluminum or cast iron and other metallic materials, which is a reliable guarantee to improve the overprint accuracy and ink quality.Several Methods Of Converting Color Image TO monochrome