You can try to reduce the image match threshold to a lower value. By default, the threshold is 0.4.
import com.kms.katalon.core.mobile.keyword.MobileBuiltInKeywords as Mobile
import com.kms.katalon.core.mobile.keyword.internal.MobileDriverFactory
import io.appium.java_client.HasSettings
import io.appium.java_client.Setting
HasSettings settings = MobileDriverFactory.getDriver()
settings.setSetting(Setting.IMAGE_MATCH_THRESHOLD, 0.2)
Mobile.findImageElement("image path")
References: http://appium.io/docs/en/advanced-concepts/image-elements/#related-settings